Table Cellmap - Archive of obsolete content
<table> <tr><td>cell 1</td><td colspan="2">cell 2</td></tr> <tr><td>cell 3</td><td>cell 4</td><td>cell 5</td></tr> </table> table cell map would be: row 0 : c0...
...dump ***** 023565b0 maprowcount=2 tablerowcount=2 row 0 : c0,0 c0,1 row 1 : c1,0 c1,1 c0,0=02763528(0) c0,1=0276381c(1) c1,0=02763990(0) c1,1=02763ab4(1) ***** end group cell map dump ***** ***** end table cell map dump ***** ***end table dump*** structural information one can imagine the cellmap as grid with equally wide rows and columns where the table cells are drawn. these cells can cover more than a grid cell if the row- or colspan attribute is different from 1. a colspan lets add a cell to the second row in the 2x2 table and let the second cell in the first row span over two cells. <table> <tr><td>cell 1</td><td colspan="2">cell 2</td></tr> <tr><td>cell 3</td><td>cell 4</td><td>cell 5</td></tr> </table> table cell map would be: row 0 : c0,0 c0,1 c row 1 : c1,...
...the bitfield will hold a 0x00090001. ...
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tree - Archive of obsolete content
te. disablekeynavigation type: boolean if this attribute is not used, the user can navigate to specific items within the element by pressing keys corresponding to letters in the item's label. this is done incrementally, so typing more letters with select more specific items. this feature may be disabled by setting this attribute to true. editable type: boolean indicates that the cells of the tree may be edited. enablecolumndrag type: boolean when set to true, the user may drag the column headers around to change the order in which they are displayed. flags type: space-separated list of the values below a set of flags used for miscellaneous purposes. two flags are defined, which may be the value of this attribute. dont-test-empty: for template generated cont...
...r of rows in the element, use the getrowcount method. seltype type: one of the values below used to indicate whether multiple selection is allowed. single only one row may be selected at a time. (default in listbox and richlistbox.) multiple multiple rows may be selected at once. (default in tree.) for trees, you can also use the following values: cell individual cells can be selected text rows are selected; however, the selection highlight appears only over the text of the primary column. for richlistbox, this is new in firefox 3.5. statedatasource type: uri chrome xul may specify an rdf datasource to use to store tree state information. this is used to hold which tree items are open and which items are collapsed. this information will be re...
...ifference, compare the selection style in the folder list and the message list in mozilla mail. tabindex type: integer gets and sets the value of the tabindex attribute. treeboxobject type: nsitreeboxobject the box object is responsible for rendering the tree on the window. this object implements the nsitreeboxobject interface and contains functions for retrieving the cells at certain coordinates, redrawing cells and scrolling the tree. this property is equivalent to the boxobject property. view type: nsitreeview the view for the tree, which is the object which generates the data to be displayed. you can assign an object which implements nsitreeview to this property. trees built from rdf or those which use treeitems directly will already have ...
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ARIA: cell role - Accessibility
the cell value of the aria role attribute identifies an element as being a cell in a tabular container that does not contain column or row header information. to be supported, the cell must be nested in an element with the role of row. <div role="row"> <span role="cell">france</span> <span role="cell">67 million</span> </div> a better, more semantic way of writing the cells above would be to use the semantic <td> element. <tr role="row"> <td role="cell">france</td> <td role="cell">67 million</td> </tr> description the element with role="cell" is a cell within a row, optionally within a rowgroup, within a grid, table or treegrid within a static tabular structure. using native html <td> elements, whenever possible, is strongly encouraged. each element with role="cell" must be ne...
...s position within the tabular data structure, including aria-colindex, aria-colspan, aria-rowindex, and aria-rowspan. using the native html table element (<table>) along with the table row element (<tr>) and table cell element (<td>) whenever possible is strongly encouraged. associated wai-aria roles, states, and properties context roles role="row" an element with role="row" is a row of cells within a tabular structure. a row contains one or more cells, grid cells, column headers, or row headers within a grid, table or treegrid, and optionally within a rowgroup. role="rowgroup" row is a required cell parent. rowgroup is an optional contextual row parent. it establishes a relationship between descendant rows. it is a structural equivalent to the thead, tfoot, and tbody elements in a...
...and optionally within a rowgroup. role="rowgroup" row is a required cell parent. rowgroup is an optional contextual row parent. it establishes a relationship between descendant rows. it is a structural equivalent to the thead, tfoot, and tbody elements in an html table element. role="table" one of the three possible contexts (along with grid and treegrid) in which you'll find a row containing cells. table identifies the cell as being part of a non-interactive table structure containing data arranged in rows and columns, similar to the native html <table> element. role="grid" one of the three possible contexts (along with table and treegrid) in which you'll find a row containing cells and gridcells. grid identifies a cell as being part of a possibly interactive table structure containing ...
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Table Reflow Internals - Archive of obsolete content
nstablerow frame ↓ nstablecell frame ↓ nsblock frame table reflow outer table reflows table and caption (if present) table reflows row groups in multiple passes pass 1 - unconstrained width, height and requests max elem width. ...
...stablecell frame ↓ nsblock frame table reflow outer table reflows table and caption (if present) table reflows row groups in multiple passes pass 1 - unconstrained width, height and requests max elem width. the table figures out the column widths (balances) given the style width constraints on the table, col groups, cols, cells the preferred and max element sizes of the cells (from the pass 1 reflow), and considers colspans pass 2 - cell widths are constrained by the column widths (heights are only constrained in paginated mode). table reflow table reflows row groups (continued) the row group figures out the row heights given its style height constraints, its rows and cells, and the actual heights of its rows and cells from the pass 2 reflow. if the table has a s...
...ths are constrained by the column widths (heights are only constrained in paginated mode). table reflow table reflows row groups (continued) the row group figures out the row heights given its style height constraints, its rows and cells, and the actual heights of its rows and cells from the pass 2 reflow. if the table has a style height, it allocates extra height to its row groups, rows and cells. in each pass, row groups reflow rows which reflow cells which reflow cell blocks. table reflow example <table width=300> <tr> <td>foo</td> <td>bar zap</td> </tr> </table> key: r = reflow reason, 0 (initial), 2 (resize) a = avail w, h c = computed w, h d = desired w, h me = max elem w debugging frame reflow gives instructions for turning this on: tblo 0...
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Mozilla Quirks Mode Behavior
tr, thead, tbody, and tfoot elements have the document background (and color?) applied to them (when the document background is specified in certain ways?) (see also bug 70831). [this may have been an accurate description when written in june 2001, but no longer appears accurate. should look into tablequirkcolorrule, re-describe, and figure out when it changed.] obsolete since gecko 37 the empty-cells property defaulted to hide in quirks mode but show (according to css2.1) in standards mode (see bug 33244) (though the correct fix would be to specify it on the html table element in quirk.css). this quirk has been removed in firefox 37 and empty-cells also defaults to show in quirks mode (bug 1020400). in quirks mode floated tables never move to the next "line" if they don't fit next to other f...
...ows/rowgroups have zero height even when a height is specified (bug 241161). something about the overhanging border (i.e., the half of the border that's outside the border-box) in border-collapse tables differs between quirks mode and standards mode. ...
... obsolete since gecko 1.9 (firefox 3) the basic table layout strategy ignores padding (on what) in quirks mode. ...
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Garbage collection
dermonkey has a mark-sweep garbage collection (gc) with incremental marking mode, generational collection, and compaction. much of the gc work is performed on helper threads. principal data structures cell a cell is the unit of memory that is allocated and collected by the gc, as used externally. in other words, from the point of view of the rest of the engine, the job of the gc is to allocate cells and automatically collect them. cell is the base class for all classes that are allocated by the gc, e.g., jsobject. allocation kind cells are classified by allocation kind. the allocation kind determines the size of the object and the finalization behavior. allocation kind is defined by enum allockind. arenas always hold objects of the same allocation kind. thus, an arena holds objects all o...
...of the object and the finalization behavior. allocation kind is defined by enum allockind. arenas always hold objects of the same allocation kind. thus, an arena holds objects all of the same size and finalization behavior. compartments the js heap is partitioned into compartments. some key properties of compartments are: every cell (js heap object) belongs to at most one compartment. (some cells are shared across all compartments in a zone.) an object may not hold a direct pointer to an object in another compartment. instead, it must store a wrapper for the other object. this allows compartments to be used for security checks: objects in the same compartment have the same access requirements, so no checks are needed, but checks may be done when traversing cross-compartment wrappers. th...
...ontains an arenaheader, a few pad bytes, and then an array of aligned elements. all elements in an arena have the same allocation kind and size. every arena maintains a list of free spans, starting at arenaheader::firstfreespanoffets. the last cell in each free span (except the last one) holds a freespan for the next free span. free span struct freespan represents a contiguous sequence of free cells [first,last] within an arena. freespan contains functions to allocate from the free span. mark bitmap the mark bitmap is represented by chunkbitmap. the mark bitmap has two bits per gc cell, so that it can represent both regular liveness marking ("marked black") as well as reachability from cycle-collected objects ("marked gray"). mark bits are allocated based on the minimum cell size, thus an...
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ARIA: gridcell role - Accessibility
l">smith</div> <div role="gridcell">496-619-5098</div> … </div> the first rule of aria is if a native html element or attribute has the semantics and behavior you require, use it instead of re-purposing an element and adding aria. instead use the native html td element in conjunction with the and contenteditable attribute: <td>potato</td> <td>cabbage</td> <td>onion</td> description gridcells with dynamically added, hidden, or removed rows and columns any element with a role="gridcell" applied to it should use aria to describe its order in the table-style grouping, provided the table, grid, or treegrid has the ability to have rows and/or columns dynamically added, hidden, or removed. use aria-colindex to describe a gridcell's order in the list of columns, and aria-rowindex to descri...
...the ids provided for aria-describedby should correspond to parent elements intended to be the rows and columns. by referencing the parent elements with roles...
... <div role="gridcell" aria-colindex="2">burks</div> <div role="gridcell" aria-colindex="5">new york</div> <div role="gridcell" aria-colindex="6">14127</div> </div> </div> … </div> describing the position of gridcells when the overall structure is unknown in situations where the table-style grouping of content does not provide information about the columns and rows, gridcells must have their positions programatically described by using aria-describedby. the ids provided for aria-describedby should correspond to parent elements intended to be the rows and columns. by referencing the parent elements with roles of rowheader or columnheader applied to them via aria-describedby, it allows assistive technology to understand the position and relationship of the gridcell ele...
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ARIA: table role - Accessibility
<span role="cell">h6</span> </div> <div role="row" aria-rowindex="18"> <span role="cell">rowgroup</span> <span role="cell">thead</span> </div> <div role="row" aria-rowindex="24"> <span role="cell">term</span> <span role="cell">dt</span> </div> </div> </div> description an element with role="table" is a static tabular structure with rows containing cells. the cells are not focusable or selectable, though widgets within individual cells of the table can be interactive. using a native html table element whenever possible is strongly encouraged. if a table maintains a selection state, has two-dimensional navigation, or allows the user to rearrange cell order use grid or treegrid instead. to create an aria table, add role="table" to the container...
...lls of the table can be interactive. using a native html table element whenever possible is strongly encouraged. if a table maintains a selection state, has two-dimensional navigation, or allows the user to rearrange cell order use grid or treegrid instead. to create an aria table, add role="table" to the container element. within that container, each row has role="row" set and contains child cells. each cell has a role of either columnheader, rowheader, or simply cell. rows can be children of the table or within a rowgroup. the table caption can be defined via aria-labelledby or aria-label. all other semantic table elements, such as <tbody>, <thead>, <tr>, <th>, and <td> need to be added via associated roles, such as rowgroup, row, columnheader, and cell. if the table contains sortable ...
...e added on the header cell element (not the table itself). if any rows or columns are hidden, the aria-colcount or aria-rowcount should be included indicating the total number of columns or rows, respectively, along with the aria-colindex or aria-rowindex on each cell. the aria-colindex or aria-rowindex is set to the position of a cell within the row or column, respectively. if the table includes cells that span multiple rows or multiple columns, then aria-rowspan or aria-colspan should be included as well. realize, it is much simpler to simply use the <table> element, along with all the related semantic elements and attributes that are all supported by all assistive technologies. to create an interactive widget that has a tabular structure, use the grid pattern instead. if the interaction pro...
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WAI-ARIA Roles - Accessibility
dy exist. a figure is generally considered to be one or more images, code snippets, or other content that puts across information in a different way to a regular flow of text.aria: form rolethe form landmark role can be used to identify a group of elements on a page that provide equivalent functionality to an html form.aria: grid rolethe grid role is for a widget that contains one or more rows of cells. the position of each cell is significant and can be focused using keyboard input.aria: gridcell rolethe gridcell role is used to make a cell in a grid or treegrid. it is intended to mimic the functionality of the html td element for table-style grouping of information.aria: heading rolethe heading role defines this element as a heading to a page or section. to give the page more structure, a lev...
...ajor groups of links used for navigating through a website or page content.aria: region rolethe region landmark role is used to identify an area in the document that the author has identified as significant. ...
... page content.aria: region rolethe region landmark role is used to identify an area in the document that the author has identified as significant. it is used to provide a generic landmark for people to be able to navigate to easily when none of the other landmark roles are appropriate.aria: row rolean element with role="row" is a row of cells within a tabular structure. ...
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border-spacing - CSS: Cascading Style Sheets
the border-spacing css property sets the distance between the borders of adjacent <table> cells. this property applies only when border-collapse is separate. the source for this interactive example is stored in a github repository. if you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request. the border-spacing value is also used along the outside edge of the table, where the distance between the table's border and the cells in the first/last column or row is the sum of the relevant (horizontal or vertical) border-spacing and the relevant (top, right, bottom, or left) padding on the table. ...
...and send us a pull request. the border-spacing value is also used along the outside edge of the table, where the distance between the table's border and the cells in the first/last column or row is the sum of the relevant (horizontal or vertical) border-spacing and the relevant (top, right, bottom, or left) padding on the table. note: the border-spacing property is equivalent to the deprecated cellspacing <table> attribute, except that it has an optional second value that can be used to set different horizontal and vertical spacing. syntax /* <length> */ border-spacing: 2px; /* horizontal <length> | vertical <length> */ border-spacing: 1cm 2em; /* global values */ border-spacing: inherit; border-spacing: initial; border-spacing: unset; the border-spacing property may be specified as e...
... spacing. syntax /* <length> */ border-spacing: 2px; /* horizontal <length> | vertical <length> */ border-spacing: 1cm 2em; /* global values */ border-spacing: inherit; border-spacing: initial; border-spacing: unset; the border-spacing property may be specified as either one or two values. when one <length> value is specified, it defines both the horizontal and vertical spacings between cells. when two <length> values are specified, the first value defines the horizontal spacing between cells (i.e., the space between cells in adjacent columns), and the second value defines the vertical spacing between cells (i.e., the space between cells in adjacent rows). values <length> the size of the spacing as a fixed value. formal definition initial value0applies totable and inline-tab...
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<table>: The Table element - HTML: Hypertext Markup Language
the source for this interactive example is stored in a github repository. if you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request. ...
...content. if the length is defined using a percentage value, the content will be centered and the total vertical space (top and bottom) will represent this value. the same is true for the total horizontal space (left and right). to achieve a similar effect, apply the border-collapse property to the <table> element, with its value set to collapse, and the padding property to the <td> elements. cellspacing this attribute defines the size of the space between two cells in a percentage value or pixels. the attribute is applied both horizontally and vertically, to the space between the top of the table and the cells of the first row, the left of the table and the first column, the right of the table and the last column and the bottom of the table and the last row. to achieve a similar eff...
...• tables • w3c wai web accessibility tutorials scoping rows and columns the scope attribute on header elements is redundant in simple contexts, because scope is inferred. however, some assistive technologies may fail to draw correct inferences, so specifying header scope may improve user experiences. in complex tables, scope can be specified so as to provide necessary information about the cells related to a header. example <table> <caption>color names and values</caption> <tbody> <tr> <th scope="col">name</th> <th scope="col">hex</th> <th scope="col">hsla</th> <th scope="col">rgba</th> </tr> <tr> <th scope="row">teal</th> <td><code>#51f6f6</code></td> <td><code>hsla(180, 90%, 64%, 1)</code></td> <td><code>rgba(81, 246, 24...
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<th> - HTML: Hypertext Markup Language
the exact nature of this group is defined by the scope and headers attributes. the source for this interactive example is stored in a github repository. if you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request. content categories none. permitted content flow content, but with no header, footer, sectioning content, or heading content descendants. tag omission the start tag is mandatory. the end tag may be omitted, if it is immediately followed by a <th> or <td> element or if there are no more data in its parent element. ...
...element. rowspan this attribute contains a non-negative integer value that indicates for how many rows the cell extends. its default value is 1; if its value is set to 0, it extends until the end of the table section (<thead>, <tbody>, <tfoot>, even if implicitly defined), that the cell belongs to. values higher than 65534 are clipped down to 65534. ...
...t value is 1; if its value is set to 0, it extends until the end of the table section (<thead>, <tbody>, <tfoot>, even if implicitly defined), that the cell belongs to. values higher than 65534 are clipped down to 65534. scope this enumerated attribute defines the cells that the header (defined in the <th>) element relates to. it may have the following values: row: the header relates to all cells of the row it belongs to. col: the header relates to all cells of the column it belongs to. rowgroup: the header belongs to a rowgroup and relates to all of its cells. these cells can be placed to the right or the left of the header, depending on the value of the dir attribute in the <table> element. colgroup: the header belongs to a colgroup and relates to all of its cells. auto the ...
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HTML documentation index - HTML: Hypertext Markup Language
, html text-level semantics, inline code, reference, web the html <code> element displays its contents styled in a fashion intended to indicate that the text is a short fragment of computer code. 81 <col> element, html, html tabular data, reference, tables, web the html <col> element defines a column within a table and is used for defining common semantics on all common cells. it is generally found within a <colgroup> element. 82 <colgroup> element, html, html tabular data, reference, tables, web the html <colgroup> element defines a group of columns within a table. 83 <command>: the html command element command, html, html commands, html5, html:element, html:element reference, obsolete the html command element (<command>) rep...
...ce, web the html superscript element (<sup>) specifies inline text which is to be displayed as superscript for solely typographical reasons. ...
...it participates in the table model. ...
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Mork
dictionaries are in practice only used to change the scope of alias definitions (the '(a=c)' that you can see in files). meta-tables are used to establish some facts about the table as well as the default row scope. meta-rows do not appear to be used at all, although the parser seems to consider setting the charset, row scope, and atom scope. some notes on further terminology: when referring to cells or aliases, the first component is the key and the second component is the value. expanding refers to taking a '^' hex buffer and replacing it with the alias value for the hex key (explained below). a mid has two components: the id itself, to the left of the colon, and the scope, to the right of the colon. there are two types of meta-rows, those of rows and those of tables. however, since the met...
...g an important part of the id, in that 1:scope1 is not the same row as 1:scope2. if the scope is not specified, then it is the default scope of the table (if it has one) or 'r' otherwise. these row ids are global, even if defined in a table. indeed, defining a row in a table is a shortcut for both defining a row and adding the row to the table. the presence of an initial minus means to delete all cells before adding new cells. a minus after the mid indicates that the next cell should be deleted. i haven't seen that case though, so it may not be an issue in practice. the rowreference is a mid that refers to a specific row. if it occurs in a table, you can treat it as adding that row to a table; in a meta-table, it is the same as making that row the meta-row of the table. groups, a.k.a. changeset...
...-row of the table. groups, a.k.a. changesets a group is theoretically an atomic transaction à la sql's transactions. the equivalent of begin transaction is the '@$${hex{@' identify (the hex represents the id). commit transaction is '@$$}hex}@' and rollback transaction '@$$}~~}'. a brief survey of mozilla code implies that it an aborted transaction is only used if mork loses internal consistency. cells and aliases and mids cells are the core of mork: they are key-value pairs of columns and the particular row's values. you can either manually refer to the key or use an alias to the key, and you can either manually refer to the value or use an alias to the value. the scope of the mid for keys defaults to the column scope, 'c', and the scope for values defaults to the value scope, 'v'. these defau...
...then the scope). the value of a mork cell is treated as nothing more than a char*, char here in the sense of an octet rather than a string character. most of the time, however, regular 7-bit ascii data is put in the cell. where integer data is used, the convention is to use and store the hexadecimal value for the output. aliases are how dictionary values are stored. they use the same semantics of cells for the value, except that it cannot refer to a mid. the values of cells and aliases, when not specified by a mid reference, are one of the cases where whitespace is significant. using the '\' character quotes the next character; at the end of the line, it represents a continuation such as that found in c\c++ code. the '$' character quotes the next two characters (which must be valid hexadecimal ...

HTMLTableRowElement - Web APIs
ies inherits properties from its parent, htmlelement. htmltablerowelement.align is a domstring containing an enumerated value reflecting the align attribute. it indicates the alignment of the element's contents with respect to the surrounding context. the possible values are "left", "right", and "center". htmltablerowelement.bgcolor is a domstring containing the background color of the cells. it reflects the obsolete bgcolor attribute. htmltablerowelement.cells read only returns a live htmlcollection containing the cells in the row. the htmlcollection is live and is automatically updated when cells are added or removed. htmltablerowelement.ch is a domstring containing one single character. this character is the one to align all the cell of a column on. it reflects the char and...
... the content of the cell must be vertically aligned. it reflects the valign attribute and can have one of the following values: "top", "middle", "bottom", or "baseline". methods inherits methods from its parent, htmlelement. htmltablerowelement.deletecell() removes the cell at the given position in the row. ...
...returns a reference to a htmltablecellelement [en-us]. specifications specification status comment html living standardthe definition of 'htmltablerowelement' in that specification. ...
...tandardthe definition of 'htmltablerowelement' in that specification. living standard html5the definition of 'htmltablerowelement' in that specification. recommendation the parameter of insertcell is now optional and default to -1. document object model (dom) level 2 html specificationthe definition of 'htmltablerowelement' in that specification. obsolete the cells, rowindex, and selectionrowindex properties are now read-only. the methods insertcell and deletecell can raise exceptions. document object model (dom) level 1 specificationthe definition of 'htmltablerowelement' in that specification. obsolete initial definition. ...

ARIA: grid role - Accessibility
the position of each cell is significant and can be focused using keyboard input. ...
...while it does not imply a specific visual presentation, it implies a relationship among elements. uses fall into two categories: presenting tabular information (data grids) and grouping other widgets (layout grids). even though both data grids and layout grids employ the same aria roles, states, and properties, differences in their content and purpose ...
...one of the last visible rows. if focus is in the first row of the grid, focus does not move. home moves focus to the first cell in the row that contains focus. end moves focus to the last cell in the row that contains focus. ctrl + home moves focus to the first cell in the first row. ctrl + end moves focus to the last cell in the last row. if cells, rows, or columns can be selected, the following key combination are commonly used: key combination action ctrl + space select the column that contains the focus. shift + space selects the row that contains the focus. if the grid includes a column with checkboxes to select rows, this key combination can be used to check that box even if the focus is not on...
...g key combination are commonly used: key combination action ctrl + space select the column that contains the focus. shift + space selects the row that contains the focus. if the grid includes a column with checkboxes to select rows, this key combination can be used to check that box even if the focus is not on the checkbox. ctrl + a selects all cells. shift + → extends selection one cell to the right. shift + ← extends selection one cell to the left. shift + ↓ extends selection one cell down. shift + ↑ extends selection one cell up. examples calendar example html <table role="grid" aria-labelledby="calendarheader" aria-readonly=true> <caption id="calendarheader">september 20...

Accessibility documentation index - Accessibility
n a different way to a regular flow of text. 63 aria: form role aria, aria role, aria figure, accessibility, reference, rôle, form the form landmark role can be used to identify a group of elements on a page that provide equivalent functionality to an html form. 64 aria: grid role aria, html the grid role is for a widget that contains one or more rows of cells. the position of each cell is significant and can be focused using keyboard input. 65 aria: gridcell role aria, html the gridcell role is used to make a cell in a grid or treegrid. it is intended to mimic the functionality of the html td element for table-style grouping of information. 66 aria: heading role aria, aria role, aria heading, reference the hea...
...sual manner. 68 aria: listbox role aria, accessibility, needscontent the listbox role is used for lists from which a user may select one or more items which are static and, unlike html <select> elements, may contain images. ...
...sibility, needscontent the listbox role is used for lists from which a user may select one or more items which are static and, unlike html <select> elements, may contain images. 69 aria: row role aria, aria role, aria row, aria row role, accessibility, reference, row role an element with role="row" is a row of cells within a tabular structure. ...
...dscontent the listbox role is used for lists from which a user may select one or more items which are static and, unlike html <select> elements, may contain images. 69 aria: row role aria, aria role, aria row, aria row role, accessibility, reference, row role an element with role="row" is a row of cells within a tabular structure. a row contains one or more cells, grid cells or column headers, and possibly a row header, within a grid, table or treegrid, and optionally within a rowgroup. 70 aria: rowgroup role aria, html, rôles, rowgroup, table an element with role="rowgroup" is a group of rows within a tabular structure. a rowgroup contains one or more rows of cells, grid cells, column headers, or row headers within a grid, table or treegrid. ...

Table Layout Strategy - Archive of obsolete content
um content width - min the minimum width that is required to layout the content, all linebreak possibilities will be used percent width - pct the cell width specified in percent, fixed width - fix the cell width specified as px, mm etc., proportional width - prop the cell width specified via 1*, 2* etc. and the desired width - des the width the content could fill without any linebreaks. cells can be members of colspans. these colspans have to distribute their space to the columns they include. this information is hold in the adjusted width's. due to this there are 10 width informations for every column. min_con des_con fix min_adj des_adj fix_adj pct pct_adj min_pro final the width parameter have the following meaning: #define width_not_set -1 #define num_widths ...
...these informations are very often conflicting. for instance one cell could have a large min width,the next could have a specified fixed width and another a specified pct width. for a given width type the maximum wins. special cases note: the following examples are not shown correctly due to technical constraints on wiki content. you can help by editing this page ...
...<table width="200px" border> <tbody> <tr><td>foo</td><td colspan="2" width="120px">bar</td></tr> <tr><td>baz</td><td>zap</td></tr> </tbody> </table> the colspan here is bogus, so the third column should not get any width. one would expect the first column to be 80 px and the second to be 120 px . the advantage of this limiting to numeffcols is that we don't poke the cellmap for nonexisting cells. overspeficied percent columns <col width="30%"><col width="60%"><tbody></tbody>foobar <col width="33%"><col><tbody></tbody>foobar <table border width="200px"> <col width="30%"><col width="60%"> <tbody> <tr><td>foo</td><td>bar</td></tr> </tbody> </table> the columns reach here only 90 % percent of the width so the remaining 20px need to be redistributed between the cols. the second table...

Building Trees - Archive of obsolete content
or this, typically when handling smaller amounts of data. however, the content builder becomes slower as the amount of data increases. apart from the flags attribute, the template syntax for the tree builder and the content builder are identical. however, the tree builder requires a very specific form to the action body. specifically, the action body should be a single treeitem with its rows and cells. here is an example (using an rdf source): <tree id="photoslist" flex="1" datasources="template-guide-photos5.rdf" ref="http://www.xulplanet.com/rdf/myphotos" flags="dont-build-content"> <treecols> <treecol id="name" label="name" flex="1"/> <treecol id="date" label="date" flex="1"/> </treecols> <template> <treechildren> <treeitem uri="rdf:*"> <treerow> ...
...gress meter or “undetermined” for an undetermined progress meter. the value attribute is used to set the current progress value for normal progress meters. the value attribute may also be used for checkbox columns by setting it to either true or false. whether a cell is a normal labeled value, a progress meter or a checkbox is determined by the type attribute on the column the cell is in. for cells in normal columns, you can use the value attribute to store some other value and you can use the view’s getcellvalue() method to retrieve it. naturally, this will retrieve the value after any variables have been substituted. besides the attributes mentioned above, any other attributes specified on the tree rows and cells are ignored. since no elements are generated, you won’t be able to retri...
...otos5.rdf" ref="http://www.xulplanet.com/rdf/myphotos" flags="dont-build-content"> <treecols> <treecol id="photo" label="photo" flex="1"/> </treecols> <template> <treechildren> <treeitem uri="rdf:*"> <treerow> <treecell src="rdf:*"/> </treerow> </treeitem> </treechildren> </template> </tree> this tree displays each photo in the tree cells. in this case, the member resource is used since that holds the photo’s url. however, it could be any other variable, a static value, or a combination of both. of course, we can’t really see the photos, since the tree’s rows are too small! it’s not normal to put photos in a tree like this—instead, the images would be used for icons. on the other hand, you could use a stylesheet to cha...

Tree Widget Changes - Archive of obsolete content
ting the value attribute to true, or leaving out the attribute. note that it's the value attribute you use, not the label attribute. <treecell/> <treecell value="true"/> you need to specify the checkbox image with css for the checkbox to display. (do not set id of the column to be 'checked' it will cause problems with the css) treechildren::-moz-tree-checkbox(checked) { /* css for checked cells */ list-style-image: url("chrome://global/skin/checkbox/cbox-check.gif"); } in addition, checkmark columns support editing: <tree editable="true"> <treecols> <treecol type="checkbox" editable="true"> ... </treecol> </treecols> </tree> if the column is editable, the user can click the cell to change the state of the checkbox. when the user clicks the cell, the view's set...
...cell by setting editable to false for that cell, as in the following: <treecell value="true" editable="false"/> or, for custom views, return false from the iseditable method. currently, only checkbox columns support editing, although the content-based tree handles the nsitreeview.setcellvalue() and nsitreeview.setcelltext() functions to change the tree content with a script for other types of cells. for instance: var col = tree.columns.getprimarycolumn(); treecell.setcelltext(5, col, "banana"); this will change the label of the cell in row 5 and the primary column to banana. however, this paves the way in the future for more general tree editing features. style improvements you can now specify the cursor to use for a cell using the css cursor property. treechildren::-moz-tree-cell-tex...
...text(5, col, "banana"); this will change the label of the cell in row 5 and the primary column to banana. however, this paves the way in the future for more general tree editing features. style improvements you can now specify the cursor to use for a cell using the css cursor property. treechildren::-moz-tree-cell-text { cursor: pointer; } this allows you to create separate cursors for cells. the :-moz-tree-separator pseudo has been improved to make it a proper box type and now has additional styling capabilities. example: treechildren::-moz-tree-separator { margin-top: 1px; border-top: 1px solid threedshadow; border-left: 1px solid threedshadow; border-right: 1px solid threedhighlight; border-bottom: 1px solid threedhighlight; height: 2px; }...

Trees - Archive of obsolete content
rk for you. for most trees, especially when you first start to use trees, you will use one of these built-in types. however, you can create a view entirely from scratch if necessary. if you do, you might store the data in an array or javascript data structure, or load the data from an xml file. since the entire body of the tree is a single widget, you can't change the style of individual rows or cells in the normal way. this is because there are no elements that display the individual cells, like there is with the listbox. instead, all drawing is done by the tree body using data supplied by the view. this is an important point and many xul developers have trouble understanding this aspect. to modify the appearance of a tree cell, the view must instead associate a set of keywords for a row and ...
..., there are special ways of styling the tree and setting other features which we will see in later sections. also, events do not get sent to treeitem element and their children; instead they get sent to the treechildren element. that the treeitems are unlike other xul elements is a common source of confusion for xul developers. essentially, the tree content view is a view where the data for the cells is supplied from tags placed inside the tree. naturally, if you are using a different kind of view, the data will be supplied from another source, and there won't be any treeitem elements at all. let's start by looking at how to create a simple tree with multiple columns using the tree content view. this could be used to create a list of mail messages. there might be multiple columns, such as th...
...to hide columns. make sure that you set an id attribute on each column or the hiding and showing of columns will not work in all versions of mozilla. the treechildren element surrounds all of the rows. inside the body are individual rows, which may in turn contain other rows. for a simpler tree, each row is created with the treeitem and treerow elements. the treerow element surrounds all of the cells in a single row, while a treeitem element would surround a row and all of its children. trees with nested rows are described in the next section. inside the rows, you will put individual tree cells. these are created using the treecell element. you can set the text for the cell using the label attribute. the first treecell in a row determines the content that will appear in the first column, the...

Browser Feature Detection - Archive of obsolete content
ontent true false true counterincrement true false true counterreset true false true cue true false false cueafter true false false cuebefore true false false cursor true true true direction true true true elevation true false false emptycells true false true fontsizeadjust true false true fontstretch true false true left true true true markeroffset true false true marks true false true maxheight true ie7 only true maxwidth true ie7 only true minheight true true true minwidth ...
... {name: 'content', 'supported': false}, {name: 'counterincrement', 'supported': false}, {name: 'counterreset', 'supported': false}, {name: 'cue', 'supported': false}, {name: 'cueafter', 'supported': false}, {name: 'cuebefore', 'supported': false}, {name: 'cursor', 'supported': false}, {name: 'direction', 'supported': false}, {name: 'elevation', 'supported': false}, {name: 'emptycells', 'supported': false}, {name: 'fontsizeadjust', 'supported': false}, {name: 'fontstretch', 'supported': false}, {name: 'left', 'supported': false}, {name: 'markeroffset', 'supported': false}, {name: 'marks', 'supported': false}, {name: 'maxheight', 'supported': false}, {name: 'maxwidth', 'supported': false}, {name: 'minheight', 'supported': false}, {name: 'minwidth', 'supported'...
...orted = true; ++level; } return math.floor( (100 * level) / features.length ); } function generatereport(object, featureset, description) { var i; var features = _features[featureset]; document.write('<p><b>' + featureset + ' support for properties/methods in ' + description + ', percentage of names defined = ' + supports(object, featureset) + '%<\/b><\/p>'); document.write('<table cellspacing="0">'); for (i = 0; i < features.length; i++) { if (features[i].supported) document.write('<tr><td>' + features[i].name + '<\/td><td>' + features[i].supported + '<\/td><\/tr>'); else document.write('<tr><td>' + features[i].name + '<\/td><td style="background-color:red">' + features[i].supported + '<\/td><\/tr>'); } document.write('<\/table>'); } var oldonerror ...

Accessibility API cross-reference
ox if you need to express 'mixed' state (some of the descendents are true, some are false), otherwise use switch or (preferred in html) <input type=checkbox>, which are true/false only. ...
... use switch or (preferred in html) <input type=checkbox>, which are true/false only. ...
...s a collection of items and objects that, as a whole, combine to create a form. form <form> presumably msaa's graphic is aria's and html's img? graphic n/a n/a img <img> a cell in a grid or treegrid. grid a composite widget containing a collection of one or more rows with one or more cells where some or all cells in the grid are focusable by using methods of two-dimensional navigation, such as directional arrow keys, e.g. a spreadsheet. gridcell a type of mouse pointer used for resizing windows grip n/a n/a n/a probably a group box (titledbox in mozilla) grouping panel panel group <field...

Mozilla Web Developer FAQ
ndards. in the standards mode gecko aims to treat documents authored in compliance with the applicable web format specifications. in the quirks mode—for the purpose of backwards compatibility—gecko mimics some behaviors of legacy browsers in ways that are spec violations. the almost standards mode is like the standards mode except it addresses the issue of the next question by rendering table cells with images in the traditional way. the mode is picked based on the doctype declaration (or the lack thereof) at the beginning of an html document. the easiest way to make sure that the standards mode is activated for html, is to use this doctype declaration: <!doctype html> the easiest way to make sure that the almost standards mode is activated for html, is to use this doctype declaration...
... rows in tables when the layout engine is in the standards mode? in the css2 box layout model the default vertical sizing of layout boxes and the default vertical alignment of images is different from the behavior of old browsers. these aspects of the layout can be changed by explicitly setting the display css property of the images (and possible surrounding <a> elements) to block. ...
... class="imgcell">, the required css rule is: .imgcell img, .imgcell a { display: block; } longer explanation… why are there still gaps even between text rows in tables when the layout engine is in the standards mode or in the almost standards mode? in the standards mode and in the almost standards mode mozilla does not suppress the default margins of the first and last child element in table cells. therefore, the default margins for paragraphs apply even with markup such as <td><p>foo</p></td>. often the content of a cell in a table of tabular data does not constitute a paragraph. in that case, the easy solution is not to mark the contents of the cell as a paragraph. when the paragraph markup is called for but the default margins are unwanted, zero margins can be suggested using css. my...

Index
like icons on buttons. iaccessibleimage only needs to be implemented in certain situations. some examples are: 169 iaccessiblerelation interfaces, needscontent, xpcom, xpcom interface reference returns a localized version of the relation type. ...
...this object attribute is obtained by parsing the attribute string returned by iaccessible2.attributes(). ...
...the 0 based table cell index. this object attribute is obtained by parsing the attribute string returned by iaccessible2.attributes(). the "table-cell-index" attribute can be used just like a child index of the typical case. ats should first test for the presence of the "table-cell-index" attribute and if it is not present then iaccessible2.indexinparent() can be used as in the typical case where cells are direct children of the table. the range of valid coordinates for this interface are implementation dependent. however, that range includes at least the intervals from the from the first row or column with the index 0 up to the last (but not including) used row or column as returned by nrows() and ncolumns(). 171 iaccessibletable2 interfaces, needshelp please also refer to...

HTMLImageElement.x - Web APIs
td><img src="https://udn.realityripple.com/samples/d6/7ab36d79bb.jpg"</td> </th> </table> <pre id="log"> </pre> javascript the javascript code that fetches the image from the table and looks up its x and y values is below. ...
...the third cell is taken from that row (once again, specifying 2 as the zero-based offset). from there, we can get the <img> element itself from the cell by calling queryselector() on the htmltablecellelement representing that cell. ...
...the third cell is taken from that row (once again, specifying 2 as the zero-based offset). from there, we can get the <img> element itself from the cell by calling queryselector() on the htmltablecellelement representing that cell. finally, we can look up and display the values of the htmlimageelement's x and y properties. ...

HTMLImageElement.y - Web APIs
td><img src="https://udn.realityripple.com/samples/d6/7ab36d79bb.jpg"</td> </th> </table> <pre id="log"> </pre> javascript the javascript code that fetches the image from the table and looks up its x and y values is below. ...
...the third cell is taken from that row (once again, specifying 2 as the zero-based offset). from there, we can get the <img> element itself from the cell by calling queryselector() on the htmltablecellelement representing that cell. ...
...the third cell is taken from that row (once again, specifying 2 as the zero-based offset). from there, we can get the <img> element itself from the cell by calling queryselector() on the htmltablecellelement representing that cell. finally, we can look up and display the values of the htmlimageelement's x and y properties. ...

Index - Web APIs
the htmlstyleelement.type read-only property returns the type of the current style. 1906 htmltablecaptionelement api, html dom, interface, reference the htmltablecaptionelement interface special properties (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating table caption elements. 1907 htmltablecellelement api, cells, html dom, htmltablecellelement, interface, reference, table cells, tables the htmltablecellelement interface provides special properties and methods (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating the layout and presentation of table cells, either header or data cells, in an html document. 1908 htmltablecolelement api, h...
...bleelement.caption api, html dom, property, reference the htmltableelement.caption property represents the table caption. if no caption element is associated with the table, this property is null. 1915 htmltableelement.cellpadding api, html dom, needsspectable, property, reference the htmltableelement.cellpadding property represents the padding around the individual cells of the table. 1916 htmltableelement.cellspacing api, html dom, htmltableelement, needsspectable, obsolete, property, reference, cellspacing while you should instead use the css border-spacing property, the obsolete htmltableelement interface's cellspacing property represents the spacing around the individual <th> and <td> elements representing a table's cells. 1917 ...
...idth property represents the desired width of the table. 1933 htmltableheadercellelement api, html dom, interface, reference the htmltableheadercellelement interface provides special properties and methods (beyond the regular htmltablecellelement and htmlelement interfaces it also has available to it by inheritance) for manipulating the layout and presentation of table header cells in an html document. 1934 htmltablerowelement api, html dom, interface, reference the htmltablerowelement interface provides special properties and methods (beyond the htmlelement interface it also has available to it by inheritance) for manipulating the layout and presentation of rows in an html table. 1935 htmltablerowelement.insertcell() api, html dom, htmlt...

ARIA: rowgroup role - Accessibility
an element with role="rowgroup" is a group of rows within a tabular structure. a rowgroup contains one or more rows of cells, grid cells, column headers, or row headers within a grid, table or treegrid. <div role="table" aria-label="populations" aria-describedby="country_population_desc"> <div id="country_population_desc">world populations by country</div> <div role="rowgroup"> <div role="row"> <span role="columnheader" aria-sort="descending">country</span> <span role="columnheader"aria-sort="none">population</span> </div> </div> <div role="rowgroup"> <div role="row"> <span role="cell">finland</span> <span role="cell">5.5 million</span> </div> <div role="row"> <span role="cell">france</span> <span ro...
... owned by, elements with either the table or grid role. using the native <thead>, <tfoot> , and <tbody> html elements, whenever possible, is strongly encouraged. to create an aria table header, table footer or table body, add role="rowgroup" to the element. that rowgroup should be nested within a grid, table or treegrid, encompassing a group of one or more rows. each row, in turn, contains child cells. these cells can be of different types, depending on whether they are column or row headers, or plain or grid cells. note: using the native html table element (<table>) along with the table header (<thead>), footer (<tfoot>), and body (<tbody>) elements whenever possible is strongly encouraged. associated wai-aria roles, states, and properties context roles role="table" one of the three...
...ible contexts (along with table and treegrid) in which you'll find a row. it identifies the row as being part of a non-interactive table structure containing data arranged in rows and columns, similar to the native <table> html element. role="treegrid" similar to a grid, but with rows that can be expanded and collapsed in the same manner as for a tree. descendant roles role="row" a row of cells within a tabular structure. a row contains one or more cells, gridcell, or column headers, and sometimes a row header. keyboard interactions none required javascript features none. the first rule of aria use is if you can use a native feature with the semantics and behavior you require already built in, instead of re-purposing an element and adding an aria role, state or property to make ...

Box alignment for block, absolutely positioned and table layout - CSS: Cascading Style Sheets
time of writing (may 2018), there is no real support for the box alignment properties in block layout. this document details how the specification expects these properties to be implemented for completeness, and is likely to change as the specification and browser implementations develop. align-content and justify-content the justify-content property does not apply to block containers or table cells. the align-content property applies to the block axis in order to align the contents of the box within its container. if a content distribution method such as space-between, space-around or space-evenly is requested then the fallback alignment will be used, as the content is treated as a single alignment subject. justify-self the justify-self property is used to align an item inside its contai...
...the box within its container. if a content distribution method such as space-between, space-around or space-evenly is requested then the fallback alignment will be used, as the content is treated as a single alignment subject. justify-self the justify-self property is used to align an item inside its containing block on the inline axis. this property does not apply to floated elements or table cells. absolutely positioned elements the alignment container is the positioned block, accounting for the offset values of top, left, bottom, and right. the normal keyword resolves to stretch, unless the positioned item is a replaced element, in which case it resolves to start. align-self the align-self property does not apply to block-level boxes (including floats), because there is more than one ...
...er is the positioned block, accounting for the offset values of top, left, bottom, and right. the normal keyword resolves to stretch, unless the positioned item is a replaced element, in which case it resolves to start. align-self the align-self property does not apply to block-level boxes (including floats), because there is more than one item in the block axis. it also does not apply to table cells. absolutely positioned elements the alignment container is the positioned block, accounting for the offset values of top, left, bottom, and right. the normal keyword resolves to stretch, unless the positioned item is a replaced element, in which case it resolves to start. aligning in these layout methods today as we do not currently have browser support for box alignment in block layout, your...

Grid template areas - CSS: Cascading Style Sheets
<div class="footer">footer</div> </div> using this method we do not need to specify anything at all on the individual grid items, everything happens on our grid container. we can see the layout described as the value of the grid-template-areas property. leaving a grid cell empty we have completely filled our grid with areas in this example, leaving no white space. however you can leave grid cells empty with this method of layout. to leave a cell empty use the full stop character, '.'. if i want to only display the footer directly under the main content i would need to leave the three cells underneath the sidebar empty. .header { grid-area: hd; } .footer { grid-area: ft; } .content { grid-area: main; } .sidebar { grid-area: sd; } * {box-sizing: border-box;} .wrapper { ...
... <div class="footer">footer</div> </div> in order to make the layout neater i can use multiple . characters. as long as there is no white space between the full stops it will be counted as one cell. for a complex layout there is a benefit to having the rows and columns neatly aligned. it means that you can actually see, right there in the css, what this layout looks like. spanning multiple cells in our example each of the areas spans multiple grid cells and we achieve this by repeating the name of that grid area multiple times with white space between. you can add extra white space in order to keep your columns neatly lined up in the value of grid-template-areas. you can see that i have done this in order that the hd and ft line up with main. the area that you create by chaining the ar...
... "sd sd sd ft ft ft ft ft ft"; } <div class="wrapper"> <div class="header">header</div> <div class="sidebar">sidebar</div> <div class="content">content</div> <div class="footer">footer</div> </div> the value of grid-template-areas must show a complete grid, otherwise it is invalid (and the property is ignored). this means that you must have the same number of cells for each row, if empty with a full stop character demonstrating that the cell is to be left empty. you will also create an invalid grid if your areas are not rectangular. redefining the grid using media queries as our layout is now contained in one part of the css, this makes it very easy to make changes at different breakpoints. you can do this by redefining the grid, the position of items on ...

table-layout - CSS: Cascading Style Sheets
the table-layout css property sets the algorithm used to lay out <table> cells, rows, and columns. the source for this interactive example is stored in a github repository. if you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request. syntax /* keyword values */ table-layout: auto; table-layout: fixed; /* global values */ table-layout: inherit; table-layout: initial; table-layout: unset; values auto by default, most browsers use an automatic table layout algorithm. the widths of the table and its cells are adjusted to fit the content. ...
...able-layout: auto; table-layout: fixed; /* global values */ table-layout: inherit; table-layout: initial; table-layout: unset; values auto by default, most browsers use an automatic table layout algorithm. the widths of the table and its cells are adjusted to fit the content. fixed table and column widths are set by the widths of table and col elements or by the width of the first row of cells. cells in subsequent rows do not affect column widths. ...
...e widths of table and col elements or by the width of the first row of cells. cells in subsequent rows do not affect column widths. under the "fixed" layout method, the entire table can be rendered once the first table row has been downloaded and analyzed. this can speed up rendering time over the "automatic" layout method, but subsequent cell content might not fit in the column widths provided. cells use the overflow property to determine whether to clip any overflowing content, but only if the table has a known width; otherwise, they won't overflow the cells. formal definition initial valueautoapplies totable and inline-table elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax auto | fixed examples fixed-width tables with text-overflow this example uses ...

Index - Archive of obsolete content
he element is on. the user can switch the state of the check box by selecting it with the mouse. a label, specified with the label attribute, may be added beside the check box. 1835 clicktoscroll event, scroll, scrollbar no summary! 1836 colorpicker xul elements, xul reference a palette of colors from which a user may select by clicking on one of the grid cells. 1837 column xul elements, xul reference a single column in a columns element. each child of the column element is placed in each successive cell of the grid. the column with the most child elements determines the number of rows in each column. 1838 columns xul elements, xul reference defines the columns of a grid. child column elements define the individ...
...ul reference this element is used to create a list of items where one or more of the items may be selected. a listbox may contain multiple columns. there are numerous methods which allow the items in the listbox to be retrieved and modified. 1862 listcell xul elements, xul reference a single cell of a listbox. by default it only contains text but iconic and checkbox listcells are also available. 1863 listcol xul elements, xul reference a column in a listbox. you can make some columns flexible and other columns non-flexible. 1864 listcols xul elements, xul reference a container for the columns of a listbox, each of which are created with the listcol element. there should be only one listcols element in a list box. if there is n...

Monitoring downloads - Archive of obsolete content
.getservice(components.interfaces.mozistorageservice); var dbconn = this.storageservice.opendatabase(this.dbfile); var loglist = document.getelementbyid("loglist"); var statement = dbconn.createstatement("select * from items"); // get all items in table try { while (statement.executestep()) { var row = document.createelement('listitem'); // add the cells to the row var cell = document.createelement('listcell'); var sourcestr = statement.getstring(0); row.setattribute("tooltiptext", sourcestr); sourcestr = sourcestr.slice(sourcestr.lastindexof("/")+1); cell.setattribute("label", sourcestr); // source row.appendchild(cell); cell = document.createelement('listcell'); cell.setattribute("labe...
...ble(), and getint64(). these methods take as a parameter the zero-based index number of the column whose value you wish to retrieve. note that the start time is being divided by 1000 before we create a javascript date object from it. that's to adjust the value from the granularity stored in the database to that expected by javascript. to right-justify the numeric columns, we set the appropriate cells' style attribute to text-align:right. exercises for the reader there are some obvious things that could be done to improve this extension. if you're learning to use the download manager or storage apis, they're things you might look into doing for practice: add code to update the download log window on the fly, instead of generating a static list when it's first opened. add additional s...

treecol.type - Archive of obsolete content
columns are a progress meters. this is used in mozilla's download manager window. text the content of the columns is text. if you are using type="checkbox", then the tree and each treecol must be editable. you need to apply css to make the checkbox toggle. here is an example css style using the current theme's checkboxes: treechildren::-moz-tree-checkbox { /* unchecked checkbox treecells. this style must come before treechildren::-moz-tree-checkbox(checked) otherwise it won't take effect. */ list-style-image: none; } treechildren::-moz-tree-checkbox(checked) { /* checked checkbox treecells. cbox-check.gif isn't available in firefox 1, 2, and 3 in mac os x so you should specify a url to an image in your extension or elsewhere. */ list-style-image: url("chrome://glo...
...cbox-check.gif isn't available in firefox 1, 2, and 3 in mac os x, so you should specify a url to an image in your extension or elsewhere. ...

Index - Archive of obsolete content
he element is on. the user can switch the state of the check box by selecting it with the mouse. a label, specified with the label attribute, may be added beside the check box. 1104 clicktoscroll event, scroll, scrollbar no summary! 1105 colorpicker xul elements, xul reference a palette of colors from which a user may select by clicking on one of the grid cells. 1106 column xul elements, xul reference a single column in a columns element. each child of the column element is placed in each successive cell of the grid. the column with the most child elements determines the number of rows in each column. 1107 columns xul elements, xul reference defines the columns of a grid. child column elements define the individ...
...ul reference this element is used to create a list of items where one or more of the items may be selected. a listbox may contain multiple columns. there are numerous methods which allow the items in the listbox to be retrieved and modified. 1131 listcell xul elements, xul reference a single cell of a listbox. by default it only contains text but iconic and checkbox listcells are also available. 1132 listcol xul elements, xul reference a column in a listbox. you can make some columns flexible and other columns non-flexible. 1133 listcols xul elements, xul reference a container for the columns of a listbox, each of which are created with the listcol element. there should be only one listcols element in a list box. if there is n...

Custom Tree Views - Archive of obsolete content
, getrowproperties: function(row,props){}, getcellproperties: function(row,col,props){}, getcolumnproperties: function(colid,col,props){} }; the functions in the example not described above do not need to perform any action, but they must be implemented as the tree calls them to gather additional information. this example can be used for a tree with 10,000 rows. the contents of the cells in the first column will be set to the text 'row x' where x is the row number. the contents of the cells in the second column will be set to 'february 18'. the if statement in the function getcelltext() compares the id property of the column argument to the text 'namecol'. this text 'namecol' corresponds to the id of the first treecol in the example above. this example is very simple of course --...
...each with data taken from the getcelltext() function. the setview() function has been called in the onload() handler for the window, but you could also set the view later if you wish. you can change the view at any time. one thing to note is that the getcelltext() function is only called when necessary to display the contents. in the 10,000 row example above, getcelltext() is only called for the cells that are currently displayed. in the image, only seven rows are displayed, the last only partially, so getcelltext() will be called only 14 times, one for each row and column. it is called for other rows when the user scrolls through them. this makes the tree much more efficient. note that the view object is also available for trees using the built-in content view. you can use this to get the ce...

Grids - Archive of obsolete content
ed with the column tag. each column has been given a flex attribute. each row contains two elements, both buttons. the first element in each row element is placed in the first column of the grid and the second element is each row is placed in the second column. note that you do not need an element to declare a cell -- there is no equivalent of the html td element. instead, you put the contents of cells directly in the row elements. grid with more elements you can use any element in place of the button element of course. if you wanted one particular cell to contain multiple elements, you can use a nested hbox or other box element. an hbox is a single element but you can put as many elements that you want inside it. for example: example 2 : source view <grid flex="1"> <columns> <column...
... top. similarly, events such as mouse buttons and keypresses are sent only to the set on top. this is why the columns were declared after the rows in the above example. if the columns has been placed first, the rows would have grabbed the events and you would not be able to type into the fields. flexibility of grids one advantage that grids have over a set of nested boxes is that you can create cells that are flexible both horizontally and vertically. you can do this by putting a flex attribute on both a row and a column. the following example demonstrates this: example 4 : source view <grid flex="1"> <columns> <column flex="5"/> <column/> <column/> </columns> <rows> <row flex="10"> <button label="cherry"/> <button label="lemon"/> <button label="grape"/> </row> <r...

Trees and Templates - Archive of obsolete content
used. you can see the difference by using mozilla's dom inspector on a tree with and without the flag. if you do use a content builder instead, note that the content won't generally get built until it is needed. with hierarchical trees, the children don't get generated until the parent nodes have been opened by the user. in the template, there will be one treecell for each column in the tree. the cells should have a label attribute to set the label for the cell. this would normally be set to an rdf property so that the label is pulled from the datasource. template-built tree example the following example demonstrates a template-built tree, in this case for the file system. example 1 : source <tree id="my-tree" flex="1" datasources="rdf:files" ref="nc:filesroot" flags="dont-build-content"...
...ow> </treeitem> </treechildren> </rule> </template> </tree> here, a tree is created with two columns, for the name and date of a file. the tree should display a list of the files in the root directory. only one rule is used, but you may add others if needed. like with other templates, the uri attribute on an element indicates where to start generating content. the two cells grab the name and date from the datasource and place the values in the cell labels. this example shows why the uri attribute becomes useful. notice how it has been placed on the treeitem in the example, even though it is not a direct descendant of the rule element. we need to put this attribute on only those elements that we want repeated for each resource. because we don't want multiple treechil...

treecol - Archive of obsolete content
to the stylesheet (see treecol.type). on firefox 2.x and 3.x, all operating systems other than mac os x already use these styles by default. if targeting firefox for mac os x, be sure to use these styles but include your own checkbox image. however, chrome://global/skin/checkbox/cbox-check.gif is available in seamonkey on mac os x.. treechildren::-moz-tree-checkbox { /* unchecked checkbox treecells. this style must come before treechildren::-moz-tree-checkbox(checked) otherwise it won't take effect. */ list-style-image: none; } treechildren::-moz-tree-checkbox(checked){ /* css for checked cells. cbox-check.gif isn't available in firefox 1, 2, and 3 on mac os x, so you should specify a url to an image in your extension or elsewhere. */ list-style-image: url("chrome://global/skin...
... mail window, for a column that indicates that the message is read or unread with a small mark in the cell. if the cycler attribute is not set, the cell is a regular text cell. dragging type: boolean this attribute will be set to true if the column is being dragged. this attribute is set automatically; you shouldn't adjust it yourself. editable type: boolean allows the contents of cells in the column to be changed, especially useful when type="checkbox". when the user double-clicks an editable cell, a text field appears in which the user can edit the contents of the cell. the tree must also be marked as editable in order for this to work. individual treecell elements in the column may be marked editable="false" in order to disable editing. fixed type: boolean if true...

Grid Cell - MDN Web Docs Glossary: Definitions of Web-related terms
the smallest unit you can have on your css grid. it is the space between four intersecting grid lines and conceptually much like a table cell. if you do not place items using one of the grid placement methods, direct children of the grid container will be placed one into each individual grid cell by the auto-placement algorithm. additional row or column tracks will be created to create enough cells to hold all items. in the example we have created a three column track grid. the five items are placed into grid cells working along an initial row of three grid cells, then creating a new row for the remaining two. * {box-sizing: border-box;} .wrapper { border: 2px solid #f76707; border-radius: 5px; background-color: #fff4e6; } .wrapper > div { border: 2px solid #ffa94d; ...
...grid-template-columns: repeat(3,1fr); grid-auto-rows: 100px; } <div class="wrapper"> <div>one</div> <div>two</div> <div>three</div> <div>four</div> <div>five</div> </div> learn more property reference grid-template-columns grid-template-rows grid-auto-rows grid-auto-columns further reading css grid layout guide: basic concepts of grid layout definition of grid cells in the css grid layout specification ...

Introduction to CSS layout - Learn web development
p to the flex example, with a container and some child elements. in addition to using display: grid, we are also defining some row and column tracks on the parent using the grid-template-rows and grid-template-columns properties respectively. we've defined three columns each of 1fr and two rows of 100px. i don’t need to put any rules on the child elements; they are automatically placed into the cells our grid has created. grid example 1 * {box-sizing: border-box;} .wrapper > div { border-radius: 5px; background-color: rgb(207,232,220); padding: 1em; } .wrapper { display: grid; grid-template-columns: 1fr 1fr 1fr; grid-template-rows: 100px 100px; grid-gap: 10px; } <div class="wrapper"> <div class="box1">one</div> <div cla...
...> <label for="lname">last name:</label> <input type="text" id="lname"> </div> <div> <label for="age">age:</label> <input type="text" id="age"> </div> </form> now, the css for our example. most of the css is fairly ordinary, except for the uses of the display property. the <form>, <div>s, and <label>s and <input>s have been told to display like a table, table rows, and table cells respectively — basically, they'll act like html table markup, causing the labels and inputs to line up nicely by default. all we then have to do is add a bit of sizing, margin, etc. to make everything look a bit nicer and we're done. you'll notice that the caption paragraph has been given display: table-caption; — which makes it act like a table <caption> — and caption-side: bottom; to tel...

Handling common accessibility problems - Learn web development
an be selected, or leave form if you are already in it. shift tab and tab (when inside form) move between form inputs. up cursor and down cursor (when inside form) change form input values (in the case of things like select boxes). spacebar (when inside form) select chosen value. ctrl + alt + cursor keys (when a table is selected) move between table cells. screenreader testing now you've gotten used to using a screenreader, we'd like you to use it to do some quick accessibility tests, to get an idea of how screenreaders deal with good and bad webpage features: look at good-semantics.html, and note how the headers are found by the screenreader and available to use for navigation. now look at bad-semantics.html, and note how the screenrea...
...how the form inputs are described using their labels because we've used <label> elements properly. in bad-form.html, they get an unhelpful label along the lines of "blank". look at our punk-bands-complete.html example, and see how the screenreader is able to associate columns and rows of content and read them out all together because we've defined headers properly. in bad-table.html, none of the cells can be associated at all. note that nvda seems to behave slightly stragely when you've only got a single table on a page; you could try webaim's table test page instead. have a look at the wai-aria live regions example we saw earlier, and note how the screen reader will keep reading out the constantly updating section as it updates. user testing as mentioned above, you can't rely on automated...

nsIAccessibleRole
xul:toolbar, role="toolbar". role_statusbar 23 represents a status bar, which is an area at the bottom of a window that displays information about the current operation, state of the application, or selected object. the status bar has multiple fields, which display different kinds of information. it is used for xul:statusbar. role_table 24 represents a table that contains rows and columns of cells, and optionally, row headers and column headers. it is used for html:table, role="grid". also refer to the following roles: role_columnheader, role_rowheader, role_column, role_row, role_cell. role_columnheader 25 represents a column header, providing a visual label for a column in a table. it is used for xul tree column headers, html:th, role="colheader". also refer to role_table. role_rowhe...
...le_row, role_cell. role_columnheader 25 represents a column header, providing a visual label for a column in a table. it is used for xul tree column headers, html:th, role="colheader". also refer to role_table. role_rowheader 26 represents a row header, which provides a visual label for a table row. it is used for role="rowheader". also, see role_table. role_column 27 represents a column of cells within a table. also, see role_table. role_row 28 represents a row of cells within a table. also, see role_table. role_cell 29 represents a cell within a table. it is used for html:td, xul:tree cell and xul:listcell. also, see role_table. role_link 30 represents a link to something else. this object might look like text or a graphic, but it acts like a button. it is used for xul:label@class...

nsITreeColumn
nvalidate(); attributes attribute type description atom nsiatom the atom attribute of nsitreecolumn which returns an nsiatom for the column, making it fast to do comparisons. read only. native code only! columns nsitreecolumns the nsitreecolumns containing this column. read only. cycler boolean if true, then the column is a cycler column. if the cycler attribute is not set, the column cells are regular text cells. read only. editable boolean if true the nsitreecolumn content is editable. if the editable attribute is not set, the column cells are not editable. read only. element nsidomelement the treecol element. read only. id astring the id attribute of the nsitreecolumn. read only. index long the index of the nsitreecolumn in displayed order. read only. primary boolean i...
...the id attribute of the nsitreecolumn. read only. index long the index of the nsitreecolumn in displayed order. read only. primary boolean if true the nsitreecolumn is the primary column. if the primary attribute is not set, the column is not the primary column. read only. selectable boolean if true the nsitreecolumn is able to be selected. if the selectable attribute is not set, the column cells are not selectable. read only. type short the type of the column, see constants. read only. width long the width of nsitreecolumn. read only. x long the x position in the tree of the left edge of the nsitreecolumn. read only. constants constant value description type_text 1 text column type. type_checkbox 2 checkbox column type. type_progressmeter 3 progress meter column type. ...

Examples of web and XML development using the DOM - Web APIs
tproperties(event); } </script> </head> <body> <h1>properties of the dom <span id="eventtype"></span> event object</h1> </body> </html> example 8: using the dom table interface the dom htmltableelement interface provides some convenience methods for creating and manipulating tables. two frequently used methods are htmltableelement.insertrow and tablerow.insertcell. ...
... < 2; i++) { cell = row.insertcell(-1); text = 'row ' + row.rowindex + ' cell ' + i; cell.appendchild(document.createtextnode(text)); } </script> notes a table's innerhtml property should never be used to modify a table, although you can use it to write an entire table or the content of a cell. if dom core methods document.createelement and node.appendchild are used to create rows and cells, ie requires that they are appended to a tbody element, whereas other browsers will allow appending to a table element (the rows will be added to the last tbody element). there are a number of other convenience methods belonging to the table interface that can be used for creating and modifying tables. ...

Traversing an HTML table with JavaScript and DOM Interfaces - Web APIs
ly (sample1.html) html <input type="button" value="generate a table." onclick="generate_table()"> javascript function generate_table() { // get the reference for the body var body = document.getelementsbytagname("body")[0]; // creates a <table> element and a <tbody> element var tbl = document.createelement("table"); var tblbody = document.createelement("tbody"); // creating all cells for (var i = 0; i < 2; i++) { // creates a table row var row = document.createelement("tr"); for (var j = 0; j < 2; j++) { // create a <td> element and a text node, make the text // node the contents of the <td>, and put the <td> at // the end of the table row var cell = document.createelement("td"); var celltext = document.createtextnode("cell in row ...
...>sample code - traversing an html table with javascript and dom interfaces</title> <script> function start() { // get the reference for the body var mybody = document.getelementsbytagname("body")[0]; // creates <table> and <tbody> elements mytable = document.createelement("table"); mytablebody = document.createelement("tbody"); // creating all cells for(var j = 0; j < 3; j++) { // creates a <tr> element mycurrent_row = document.createelement("tr"); for(var i = 0; i < 4; i++) { // creates a <td> element mycurrent_cell = document.createelement("td"); // creates a text node currenttext = document.createtextnode("cell is row " + j + ", co...

Element.getElementsByTagNameNS() - Web APIs
ace uri of elements to look for (see element.namespaceuri and attr.namespaceuri). for example, if you need to look for xhtml elements, use the xhtml namespace uri, http://www.w3.org/1999/xhtml. localname is either the local name of elements to look for or the special value "*", which matches all elements (see element.localname and attr.localname). ...
...you need to look for xhtml elements, use the xhtml namespace uri, http://www.w3.org/1999/xhtml. localname is either the local name of elements to look for or the special value "*", which matches all elements (see element.localname and attr.localname). example // check the alignment on a number of cells in a table in an xhtml document. var table = document.getelementbyid("forecast-table"); var cells = table.getelementsbytagnamens("http://www.w3.org/1999/xhtml", "td"); for (var i = 0; i < cells.length; i++) { var axis = cells[i].getattribute("axis"); if (axis == "year") { // grab the data } } specifications specification status comment domthe definition of 'element.getelementsbytagnamens()' in that specification. living standard changed the...

HTMLTableElement - Web APIs
ing properties are obsolete. you should avoid using them. htmltableelement.align is a domstring containing an enumerated value reflecting the align attribute. it indicates the alignment of the element's contents with respect to the surrounding context. the possible values are "left", "right", and "center". htmltableelement.bgcolor is a domstring containing the background color of the cells. it reflects the obsolete bgcolor attribute. htmltableelement.border is a domstring containing the width in pixels of the border of the table. it reflects the obsolete border attribute. htmltableelement.cellpadding is a domstring containing the width in pixels of the horizontal and vertical sapce between cell content and cell borders. it reflects the obsolete cellpadding attribute. htmlt...
...s the obsolete bgcolor attribute. htmltableelement.border is a domstring containing the width in pixels of the border of the table. it reflects the obsolete border attribute. htmltableelement.cellpadding is a domstring containing the width in pixels of the horizontal and vertical sapce between cell content and cell borders. it reflects the obsolete cellpadding attribute. htmltableelement.cellspacing is a domstring containing the width in pixels of the horizontal and vertical separation between cells. it reflects the obsolete cellspacing attribute. htmltableelement.frame is a domstring containing the type of the external borders of the table. it reflects the obsolete frame attribute and can take one of the following values: "void", "above", "below", "hsides", "vsides", "lhs", "rh...

Selection.rangeCount - Web APIs
nges in the selection. before the user has clicked a freshly loaded page, the rangecount is 0. after the user clicks on the page, rangecount is 1, even if no selection is visible. a user can normally only select one range at a time, so the rangecount will usually be 1. scripting can be used to make the selection contain more than one range. gecko browsers allow multiple selections across table cells. firefox allows to select multiple ranges in the document by using ctrl+click (unless the click within an element with display: table-cell). syntax value = sel.rangecount example the following example will show the rangecount every second. select text in the browser to see it change. html <table> <tr><td>a.1<td>a.2 <tr><td>b.1<td>b.2 <tr><td>c.1<td>c.2 javascript window.setinterva...
... show the rangecount every second. select text in the browser to see it change. html <table> <tr><td>a.1<td>a.2 <tr><td>b.1<td>b.2 <tr><td>c.1<td>c.2 javascript window.setinterval(function () { console.log(window.getselection().rangecount); }, 1000); result open your console to see how many ranges are in the selection. in gecko browsers, you can select multiple ranges across table cells by holding down ctrl while dragging with the mouse. specifications specification status comment selection apithe definition of 'selection.rangecount' in that specification. working draft current ...

Introduction to formatting contexts - CSS: Cascading Style Sheets
e <html> element is not the only element capable of creating a block formatting context. any block-level element can be made to create a bfc by the application of certain css properties. ...
...ormatting context. any block-level element can be made to create a bfc by the application of certain css properties. ...

Basic Concepts of grid layout - CSS: Cascading Style Sheets
ing: border-box;} .wrapper { border: 2px solid #f76707; border-radius: 5px; background-color: #fff4e6; } .wrapper > div { border: 2px solid #ffa94d; border-radius: 5px; background-color: #ffd8a8; padding: 1em; color: #d9480f; } don't forget that you can use the grid inspector in firefox developer tools to see how the items are positioned against the lines of the grid. ...
...s are positioned against the lines of the grid. grid cells a grid cell is the smallest unit on a grid. conceptually it is like a table cell. as we saw in our earlier examples, once a grid is defined as a parent the child items will lay themselves out in one cell each of the defined grid. in the below image, i have highlighted the first cell of the grid. grid areas items can span one or more cells both by row or by column, and this creates a grid area. grid areas must be rectangular – it isn’t possible to create an l-shaped area for example. the highlighted grid area spans two row and two column tracks. gutters gutters or alleys between grid cells can be created using the column-gap and row-gap properties, or the shorthand gap. in the below example, i am creating a 10-pixel gap bet...

Line-based placement with CSS Grid - CSS: Cascading Style Sheets
teraction between writing modes and grids in a later guide. a basic example as a very simple example we can take a grid with 3 column tracks and 3 row tracks. this gives us 4 lines in each dimension. inside our grid container i have four child elements. if we do not place these on to the grid in any way they will lay out according to the auto-placement rules, one item in each of the first four cells. if you use the firefox grid highlighter you can see how the grid has defined columns and rows. * {box-sizing: border-box;} .wrapper { border: 2px solid #f76707; border-radius: 5px; background-color: #fff4e6; } .wrapper > div { border: 2px solid #ffa94d; border-radius: 5px; background-color: #ffd8a8; padding: 1em; color: #d9480f; } .wrapper { display: g...
...the grid and span to the fourth row line. .box1 { grid-column-start: 1; grid-column-end: 2; grid-row-start: 1; grid-row-end: 4; } as you position some items, other items on the grid will continue to be laid out using the auto-placement rules. we will take a proper look at how these work in a later guide but you can see as you work that grid is laying out un-placed items into empty cells of the grid. addressing each item individually we can place all four items spanning row and column tracks. note that we can leave cells empty if we wish. one of the very nice things about grid layout is this ability to have white space in our designs without having to push things around using margins to prevent floats from rising up into the space we have left. * {box-sizing: border-box;} .wr...

Relationship of grid layout to other layout methods - CSS: Cascading Style Sheets
r. you let the size of the content decide how much individual space each item takes up. if the items wrap onto a new line, they will work out their spacing based on their size and the available space on that line. grid works from the layout in. when you use css grid layout you create a layout and then you place items into it, or you allow the auto-placement rules to place the items into the grid cells according to that strict grid. it is possible to create tracks that respond to the size of the content, however, they will also change the entire track. if you are using flexbox and find yourself disabling some of the flexibility, you probably need to use css grid layout. an example would be if you are setting a percentage width on a flex item to make it line up with other items in a row above. ...
...ignment in css grids this second example uses a grid to create the same layout. this time we are using the box alignment properties as they apply to a grid layout. so we align to start and end rather than flex-start and flex-end. in the case of a grid layout, we are aligning the items inside their grid area. in this case that is a single grid cell, but it could be an area made up of several grid cells. * {box-sizing: border-box;} .wrapper { border: 2px solid #f76707; border-radius: 5px; background-color: #fff4e6; } .wrapper > div { border: 2px solid #ffa94d; border-radius: 5px; background-color: #ffd8a8; padding: 1em; color: #d9480f; } <div class="wrapper"> <div class="box1">one</div> <div class="box2">two</div> <div class="box3">three</div> </div> .wrapper { d...

align-self - CSS: Cascading Style Sheets
ems value. in grid, it aligns the item inside the grid area. in flexbox, it aligns the item on the cross axis. the source for this interactive example is stored in a github repository. if you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request. the property doesn't apply to block-level boxes, or to table cells. if a flexbox item's cross-axis margin is auto, then align-self is ignored. syntax /* keyword values */ align-self: auto; align-self: normal; /* positional alignment */ /* align-self does not take left and right values */ align-self: center; /* put the item around the center */ align-self: start; /* put the item at the start */ align-self: end; /* put the item at the end */ align-self: self-st...
...bsolutely-positioned boxes. in static position of absolutely-positioned layouts, the keyword behaves as stretch. for flex items, the keyword behaves as stretch. for grid items, this keyword leads to a behavior similar to the one of stretch, except for boxes with an aspect ratio or an intrinsic sizes where it behaves like start. the property doesn't apply to block-level boxes, and to table cells. self-start aligns the items to be flush with the edge of the alignment container corresponding to the item's start side in the cross axis. self-end aligns the items to be flush with the edge of the alignment container corresponding to the item's end side in the cross axis. flex-start the cross-start margin edge of the flex item is flushed with the cross-start edge of the line. flex-en...

border-collapse - CSS: Cascading Style Sheets
the border-collapse css property sets whether cells inside a <table> have shared or separate borders. the source for this interactive example is stored in a github repository. if you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request. when cells are collapsed, the border-style value of inset behaves like groove, and outset behaves like ridge. when cells are separated, the distance between cells is defined by the border-spacing property. syntax /* keyword values */ border-collapse: collapse; border-collapse: separate; /* global values */ border-collapse: inherit; border-collapse: initial; border-collapse: unset; the border-collapse property is specified as a single keyword, which may be chosen f...
...e separated, the distance between cells is defined by the border-spacing property. syntax /* keyword values */ border-collapse: collapse; border-collapse: separate; /* global values */ border-collapse: inherit; border-collapse: initial; border-collapse: unset; the border-collapse property is specified as a single keyword, which may be chosen from the list below. values collapse adjacent cells have shared borders (the collapsed-border table rendering model). separate adjacent cells have distinct borders (the separated-border table rendering model). formal definition initial valueseparateapplies totable and inline-table elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax collapse | separate examples a colorful table of browser engines html <tabl...

grid-template-areas - CSS: Cascading Style Sheets
the source for this interactive example is stored in a github repository. if you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request. those areas are not associated with any particular grid item, but can be referenced from the grid-placement properties grid-row-start, grid-row-end, grid-column-start, grid-column-end, and their shorthands grid-row, grid-column, and grid-area. ...
...*/ grid-template-areas: inherit; grid-template-areas: initial; grid-template-areas: unset; values none the grid container doesn’t define any named grid areas. <string>+ a row is created for every separate string listed, and a column is created for each cell in the string. multiple named cell tokens within and between rows create a single named grid area that spans the corresponding grid cells. unless those cells form a rectangle, the declaration is invalid. formal definition initial valuenoneapplies togrid containersinheritednocomputed valueas specifiedanimation typediscrete formal syntax none | <string>+ examples specifying named grid areas html <section id="page"> <header>header</header> <nav>navigation</nav> <main>main area</main> <footer>footer</footer> </section>...

place-self - CSS: Cascading Style Sheets
bsolutely-positioned boxes. in static position of absolutely-positioned layouts, the keyword behaves as stretch. for flex items, the keyword behaves as stretch. for grid items, this keyword leads to a behavior similar to the one of stretch, except for boxes with an aspect ratio or an intrinsic sizes where it behaves like start. the property doesn't apply to block-level boxes, and to table cells. self-start aligns the items to be flush with the edge of the alignment container corresponding to the item's start side in the cross axis. self-end aligns the items to be flush with the edge of the alignment container corresponding to the item's end side in the cross axis. flex-start the cross-start margin edge of the flex item is flushed with the cross-start edge of the line. flex-en...
...lf. otherwise the specified value.justify-self: as specifiedanimation typediscrete formal syntax <'align-self'> <'justify-self'>? examples simple demonstration in the following example we have a simple 2 x 2 grid layout. initially the grid container has justify-items and align-items values of stretch — the defaults — which causes the grid items to stretch across the entire width of their cells. the second, third, and fourth grid items are then given different values of place-self, to show how these override the default placements. these values cause the grid items to span only as wide/tall as their content width/height, and align in different positions across their cells, in the block and inline directions. html <article class="container"> <span>first</span> <span>second</span> ...

visibility - CSS: Cascading Style Sheets
y set to visible. the element cannot receive focus (such as when navigating through tab indexes). collapse for <table> rows, columns, column groups, and row groups, the row(s) or column(s) are hidden and the space they would have occupied is removed (as if display: none were applied to the column/row of the table). however, the size of other rows and columns is still calculated as though the cells in the collapsed row(s) or column(s) are present. this value allows for the fast removal of a row or column from a table without forcing the recalculation of widths and heights for the entire table. collapsed flex items are hidden, and the space they would have occupied is removed. for xul elements, the computed size of the element is always zero, regardless of other styles that would normally ...
...a result of cubic-bezier() functions with y values outside of [0, 1]) map to the closer endpoint. notes support for visibility: collapse is missing or partially incorrect in some modern browsers. it may not be correctly treated like visibility: hidden on elements other than table rows and columns. visibility: collapse may change the layout of a table if the table has nested tables within the cells that are collapsed, unless visibility: visible is specified explicitly on nested tables. formal definition initial valuevisibleapplies toall elementsinheritedyescomputed valueas specifiedanimation typea visibility formal syntax visible | hidden | collapse examples basic example html <p class="visible">the first paragraph is visible.</p> <p class="not-visible">the second paragraph is not ...

Block formatting context - Developer guides
gion in which the layout of block boxes occurs and in which floats interact with other elements. a block formatting context is created by at least one of the following: the root element of the document (<html>). floats (elements where float isn't none). absolutely positioned elements (elements where position is absolute or fixed). inline-blocks (elements with display: inline-block). ...
...th other elements. a block formatting context is created by at least one of the following: the root element of the document (<html>). floats (elements where float isn't none). absolutely positioned elements (elements where position is absolute or fixed). inline-blocks (elements with display: inline-block). table cells (elements with display: table-cell, which is the default for html table cells). table captions (elements with display: table-caption, which is the default for html table captions). anonymous table cells implicitly created by the elements with display: table, table-row, table-row-group, table-header-group, table-footer-group (which is the default for html tables, table rows, table bodies, table headers, and table footers, respectively), or inline-table. block elements wh...

<col> - HTML: Hypertext Markup Language
it is generally found within a <colgroup> element. the source for this interactive example is stored in a github repository. if you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request. <col> allows styling columns using css, but only a few properties will have an effect on the column (see the css 2.1 specification for a list). content categories none. permitted content none, it is an empty element. ...
...combining adequate css attribute selectors like [colspan=n], though this is not trivial. bgcolor the background color of the table. it is a 6-digit hexadecimal rgb code, prefixed by a '#'. one of the predefined color kewords can also be used. to achieve a similar effect, use the css background-color property. char this attribute is used to set the character to align the cells in a column on. typical values for this include a period (.) when attempting to align numbers or monetary values. if align is not set to char, this attribute is ignored. charoff this attribute is used to indicate the number of characters to offset the column data from the alignment characters specified by the char attribute. valign this attribute specifies the vertical alignment of the te...

<td>: The Table Data Cell element - HTML: Hypertext Markup Language
d is left. note: to achieve the same effect as the left, center, right or justify values, apply the css text-align property to the element. to achieve the same effect as the char value, give the text-align property the same value you would use for the char. unimplemented in css3. axis this attribute contains a list of space-separated strings. each string is the id of a group of cells that this header applies to. bgcolor this attribute defines the background color of each cell in a column. it is a 6-digit hexadecimal rgb code, prefixed by a '#'. one of the predefined color kewords can also be used. to achieve a similar effect, use the css background-color property. char the content in the cell element is aligned to a character. typical values include a period ...
...rs or monetary values. if align is not set to char, this attribute is ignored. charoff this attribute is used to shift column data to the right of the character specified by the char attribute. its value specifies the length of this shift. height this attribute is used to define a recommended cell height. use the css height property instead. scope this enumerated attribute defines the cells that the header (defined in the <th>) element relates to. only use this attribute with the <th> element to define the row or column for which it is a header. valign this attribute specifies how a text is vertically aligned inside a cell. possible values for this attribute are: baseline: positions the text near the bottom of the cell and aligns it with the baseline of the characters instea...

<tfoot>: The Table Foot element - HTML: Hypertext Markup Language
t use this attribute, as it is non-standard and only implemented some versions of microsoft internet explorer: the <tfoot> element should be styled using css. to give a similar effect to the bgcolor attribute, use the css property background-color, on the relevant <td> or <th> elements. char deprecated since html4obsolete since html5 this attribute is used to set the character to align the cells in a column on. typical values for this include a period (.) when attempting to align numbers or monetary values. if align is not set to char, this attribute is ignored. note: do not use this attribute as it is obsolete (and not supported) in the latest standard. to achieve the same effect as the char, in css3, you can use the character set using the char attribute as the value of the text-align...
...solete since html5 this attribute is used to indicate the number of characters to offset the column data from the alignment characters specified by the char attribute. note: do not use this attribute as it is obsolete (and not supported) in the latest standard. valign deprecated since html4obsolete since html5 this attribute specifies the vertical alignment of the text within each row of cells of the table header. possible values for this attribute are: baseline, which will put the text as close to the bottom of the cell as it is possible, but align it on the baseline of the characters instead of the bottom of them. if characters are all of the size, this has the same effect as bottom. bottom, which will put the text as close to the bottom of the cell as it is possible; middle,...

<thead>: The Table Head element - HTML: Hypertext Markup Language
sage note: do not use this attribute, as it is non-standard and only implemented in some versions of microsoft internet explorer: the <thead> element should be styled using css. to give a similar effect to the bgcolor attribute, use the css property background-color, on the relevant <td> or <th> elements. char in html 4, in html5 this attribute is used to set the character to align the cells in a column on. typical values for this include a period (.) when attempting to align numbers or monetary values. if align is not set to char, this attribute is ignored. note: do not use this attribute as it is obsolete (and not supported) in the latest standard. to achieve the same effect as the char, in css3, you can use the character set using the char attribute as the value of the text-align...
... charoff in html 4, in html5 this attribute is used to indicate the number of characters to offset the column data from the alignment characters specified by the char attribute. note: do not use this attribute as it is obsolete (and not supported) in the latest standard. valign in html 4, in html5 this attribute specifies the vertical alignment of the text within each row of cells of the table header. possible values for this attribute are: baseline, which will put the text as close to the bottom of the cell as it is possible, but align it on the baseline of the characters instead of the bottom of them. if characters are all of the size, this has the same effect as bottom. bottom, which will put the text as close to the bottom of the cell as it is possible; middle,...

HTML elements reference - HTML: Hypertext Markup Language
range of text that has been added to a document. table content the elements here are used to create and handle tabular data. element description <caption> the html <caption> element specifies the caption (or title) of a table. <col> the html <col> element defines a column within a table and is used for defining common semantics on all common cells. it is generally found within a <colgroup> element. <colgroup> the html <colgroup> element defines a group of columns within a table. <table> the html <table> element represents tabular data — that is, information presented in a two-dimensional table comprised of rows and columns of cells containing data. <tbody> the html table body element (<tbody>) en...
...ows (<tr> elements), indicating that they comprise the body of the table (<table>). <td> the html <td> element defines a cell of a table that contains data. it participates in the table model. <tfoot> the html <tfoot> element defines a set of rows summarizing the columns of the table. <th> the html <th> element defines a cell as header of a group of table cells. the exact nature of this group is defined by the scope and headers attributes. <thead> the html <thead> element defines a set of rows defining the head of the columns of the table. <tr> the html <tr> element defines a row of cells in a table. the row's cells can then be established using a mix of <td> (data cell) and <th> (header cell) elements. forms html pr...

MathML attribute reference - MathML
evelled <mfrac> specifies the style how the fraction should be displayed. deprecated. use u+2044 (fraction slash) instead. unimplemented charalign <mstack> specifies the horizontal alignment of digits. close <mfenced> a string for the closing delimiter. columnalign <mtable>, <mtd>, <mtr>, <mlabeledtr> specifies the horizontal alignment of table cells. columnlines <mtable> specifies table column borders. columnspacing <mtable> specifies the space between table columns. columnspan <mtd> a non-negative integer value that indicates over how many table columns the cell extends. unimplemented columnwidth <mtable> specifies the width of table columns. unimplemented crossout <msc...
...er the fraction. open <mfenced> a string for the opening delimiter. unimplemented overflow <math> if an expression is too long to fit in the allowed width, this attribute sets the preferred handling. unimplemented position <msgroup>, <msrow>, <mscarries>, <msline> rowalign <mtable>, <mtd>, <mtr> specifies the vertical alignment of table cells. rowlines <mtable> specifies table row borders. rowspacing <mtable> specifies the space between table rows. rowspan <mtd> a non-negative integer value that indicates on how many rows does the cell extend. rspace <mo> the amount of space after the operator. rquote <ms> the closing quote mark (depends on dir) to enclose the ...

<mtable> - MathML
with gecko 8.0 (firefox 8.0 / thunderbird 8.0 / seamonkey 2.5) the interpretation of negative values has been corrected (bug 601436). in gecko 17.0 (firefox 17.0 / thunderbird 17.0 / seamonkey 2.14) the parsing has been updated to treat whitespace correctly. alignmentscope unimplemented class, id, style provided for use with stylesheets. columnalign specifies the horizontal alignment of the cells. multiple values separated by space are allowed and apply to the corresponding columns (e.g. columnalign="left right center"). possible values are: left, center (default) and right. columnlines specifies column borders. multiple values separated by space are allowed and apply to the corresponding columns (e.g. columnlines="none none solid"). possible values are: none (default), solid and dashed...
...plemented href used to set a hyperlink to a specified uri. mathbackground the background color. you can use #rgb, #rrggbb and html color names. mathcolor the text color. you can use #rgb, #rrggbb and html color names. unimplemented minlabelspacing a length value specifing the minimum space between a label and the adjacent cell in the row. rowalign specifies the vertical alignment of the cells. multiple values separated by space are allowed and apply to the corresponding rows (e.g. rowalign="top bottom axis"). possible values are: axis, baseline (default), bottom, center and top. rowlines specifies row borders. multiple values separated by space are allowed and apply to the corresponding rows (e.g. rowlines="none none solid"). possible values are: none (default), solid and dashed. u...

Drag and Drop JavaScript Wrapper - Archive of obsolete content
s how to set the data to be dragged from the element's label attribute. in this case we only provide the data in one flavour. var textobserver = { ondragstart: function (event) { var txt = event.target.getattribute("label"); transferdata.data = new transferdata(); transferdata.data.adddataforflavour("text/unicode",txt); } } this might be useful when implementing drag and drop for cells in a tree. you can use the value of a cell, or some resource from an rdf file if the tree is built from a template, as the value of a drag. if you store it as a string, any object that accepts strings dragged onto it can grab the dragged data. if you want to send more then one data object, (for example multiple files) you must use an transferdataset as follows: var textobserver = { ondragstart:...

jspage - Archive of obsolete content
):null;};var e={html:"innerhtml","class":"classname","for":"htmlfor",defaultvalue:"defaultvalue",text:(browser.engine.trident||(browser.engine.webkit&&browser.engine.version<420))?"innertext":"textcontent"}; var b=["compact","nowrap","ismap","declare","noshade","checked","disabled","readonly","multiple","selected","noresize","defer"];var k=["value","type","defaultvalue","accesskey","cellpadding","cellspacing","colspan","frameborder","maxlength","readonly","rowspan","tabindex","usemap"]; b=b.associate(b);hash.extend(e,b);hash.extend(e,k.associate(k.map(string.tolowercase)));var a={before:function(m,l){if(l.parentnode){l.parentnode.insertbefore(m,l); }},after:function(m,l){if(!l.parentnode){return;}var n=l.nextsibling;(n)?l.parentnode.insertbefore(m,n):l.parentnode.appendchild(m);},bottom:functio...

Migrate apps from Internet Explorer to Mozilla - Archive of obsolete content
or xhtml mimetype for any "doctype html system" doctype (for example, <!doctype html system "http://www.w3.org/tr/rec-html40/strict.dtd">), except for the ibm doctype for unknown doctypes or doctypes without dtds almost standards mode mozilla introduced almost standards mode for one reason: a section in the css 2 specification breaks designs based on a precise layout of small images in table cells. instead of forming one image to the user, each small image ends up with a gap next to it. the old ibm homepage shown in figure 5 offers an example. figure 5. image gap almost standards mode behaves almost exactly as standards mode, except when it comes to an image gap issue. the issue occurs often on standards-compliant pages and causes them to display incorrectly. mozilla uses almost stand...

Table Layout Regression Tests - Archive of obsolete content
file in rtest.lst mozilla takes the root frame and dumps the whole tree via nsframe::dumpregression. the frame tree dumps are invoked by the nsilayoutdebugger. the frame trees are dumped to separate files in a baseline or verify directory for all url's in rtest.lst (see: nsregressiontester::dumpframemodel). their name is generated by replacing the old extension .html or .xml with .rgd. for appendcells1.html a file appendcells1.rgd will be created in the baseline or verify subdirectory. a typical beginning of a dump (*.rgd file) looks like: <frame va="15022440" type="viewport(-1)" state="270340" parent="0"> <view va="47171904"> </view> <stylecontext va="15022232"> <font serif 240 240 0 /> <color data="-16777216"/> <background data="0 2 3 -1 0 0 "/> <spacing data="left: n...

Elements - Archive of obsolete content
hello from my binding! </html:b><children/></content> </binding> </bindings> you can view the result by opening helloworld.html in firefox. hello.xml should reside in the same directory which contains helloworld.html. next: bindings > binding element. notes in the current stable releases of mozilla products (e.g. firefox 2) it is impossible to attach bindings to table sub-elements (rows, cells etc.) you can attach binding only to the table element itself. this has been fixed for future versions of mozilla products. see bug 83830 for more information and for workarounds. default encoding in xml documents (including xbl files) is utf-8. an explicit encoding declarations may be present to override the default, for example <?xml version="1.0" encoding="iso-8859-1"?> uri in namespace decl...

seltype - Archive of obsolete content
« xul reference home seltype type: one of the values below used to indicate whether multiple selection is allowed. single only one row may be selected at a time. (default in listbox and richlistbox.) multiple multiple rows may be selected at once. (default in tree.) for trees, you can also use the following values: cell individual cells can be selected text rows are selected; however, the selection highlight appears only over the text of the primary column. for richlistbox, this is new in firefox 3.5. ...

tree.editable - Archive of obsolete content
...

treecell.editable - Archive of obsolete content
« xul reference home editable type: boolean allows the contents of individual cells in the column to be changed, especially useful when <treecol type="checkbox">. also useful for disabling editing of individual treecells. when the user double-clicks an editable cell, a text field appears in which the user can edit the contents of the cell. the tree and treecol must also be marked as editable in order for this to work. the tree must be a content tree for this to work on treecells. ...

treecol.editable - Archive of obsolete content
when the user double-clicks an editable cell, a text field appears in which the user can edit the contents of the cell. the tree must also be marked as editable in order for this to work. ...

Tooltips - Archive of obsolete content
as the value of the last child of the tooltip. in the earlier example, the last child of the tooltip is a label. the effect is that the value of the label within the tooltip will change based on the element that the mouse is moved over. tooltips in trees as the entire body of the tree is displayed using a single element, the tooltip and tooltiptext attributes do not apply to individual rows or cells of a tree. however, the tree will automatically display tooltips for a cell when the value is cropped. for instance, if a cell has a long label and the column is shorter than the label's length, a tooltip will appear when the mouse is moved over the cell so that the user can see the entire value. ...

treeBoxObject - Archive of obsolete content
« xul reference treeboxobject type: nsitreeboxobject the box object is responsible for rendering the tree on the window. this object implements the nsitreeboxobject interface and contains functions for retrieving the cells at certain coordinates, redrawing cells and scrolling the tree. this property is equivalent to the boxobject property. ...

view - Archive of obsolete content
« xul reference view type: nsitreeview the view for the tree, which is the object which generates the data to be displayed. you can assign an object which implements nsitreeview to this property. trees built from rdf or those which use treeitems directly will already have a view. functions available in the view allow one to retrieve the data within the cells, and determine which rows are nested within others. for a complete list of view functions, see the nsitreeview interface. ...

Sorting Results - Archive of obsolete content
er means. if you don't want to allow sorting by a certain column, you can leave out the sort attribute. only specify this attribute on columns that you wish to allow the user to sort by. here is a complete example of sorting a tree. the sort attribute should be set to the variable that holds the values to sort by. usually, this would be the same variable that is used to generate the label for the cells in that column, however this is not actually necessary. for instance, in the example the second column sorts by date, but if you were to use a different variable such as ?description, the tree would sort by the value of the description variable for each row. in almost all situations however, you would normally sort using the same variable used for the label value. however, one situation where thi...

Things I've tried to do with XUL - Archive of obsolete content
reate and attach 2nd cell var cell = document.createelement('listcell'); cell.setattribute('label', label2 ); cell.setattribute('value', value2 ); row.appendchild( cell ); // etc // ... while this works at first, after a number of rows have been added it breaks and stops displaying the first cell (the one specified by the appenditem call). ...

List Controls - Archive of obsolete content
<listcell label="swashbuckler" /> </listitem> </listbox> in this example, the flex attribute is used to make the column flexible. this attribute will be described in a later section, but here it allows the column to fill all of the remaining space horizontally. you can resize the window to see that the column stretches as the window does. if you shrink the size horizontally, the labels on the cells will crop themselves automatically using an ellipsis. you can use the crop attribute on the cells or items set to the value none to disable the ellipsis. drop-down lists drop-down lists can be created in html using the select element. the user can see a single choice in a textbox and may click the arrow or some similar such button next to the textbox to make a different selection. the other cho...

More Tree Features - Archive of obsolete content
ing the open attribute. when the user expands and collapses the parent, the view's toggleopenstate function will be called to toggle the item between open and closed. for a content tree view, this will set the open attribute to reflect the current state. the second change is that you must put the primary attribute on the first column. this causes a small triangle or plus sign to appear before the cells in that column to indicate the cells that can be expanded. in addition, child rows are indented. note also that the user cannot hide the primary column using the drop down to the right of the columns. example hierarchical tree the following is a simple example: example 1 : source view <tree rows="6"> <treecols> <treecol id="firstname" label="first name" primary="true" flex="3" /> ...

RDF Datasources - Archive of obsolete content
referrer referrer of the page url http://home.netscape.com/nc-rdf#url url of the page visit count http://home.netscape.com/nc-rdf#visitcount number of page visits a typical history list will display a tree with a selection of these fields. to use them, just put the url values above in the label attributes of the buttons or treecells. you can use nc:historyroot as the value of the ref attribute. you can also use the value nc:historybydate to get the history sorted into days. using the history list example let's see an example of displaying the history list. we'll display the history in a tree with three columns, the name, the url and the date. example 1 : source <tree flex="1" datasources="rdf:history" ref="nc:historyroot"> ...

Templates - Archive of obsolete content
dom elements for the rows. instead, it gets the data directly from the rdf datasource whenever it needs it. since trees are often expected to display thousands of rows of data, this is much more efficient. creating an element for every cell would be too costly. however, the tradeoff is that trees may only display text, and, since no elements are created, you can't use css properties to style tree cells in the same way. the tree builder is only used for trees. other elements use only the content builder. this isn't a problem though, since other elements such as menus wouldn't be expected to display too many items. it's also possible to use the content builder for trees as well, and a treeitem element and related elements will be created for each row. rules in the image of the earlier example,...

XUL Questions and Answers - Archive of obsolete content
</listitem> </listbox> <listbox rows="4"> <listhead> <listheader label="single-column"/> </listhead> <listitem type="checkbox" value="1" label="vghkvghk"/> <listitem type="checkbox" value="2" label="vghjkvk" checked="true"/> <listitem type="checkbox" value="3" label="hukfzgjcfj" disabled="true"/> </listbox> </window> list box handlers can only check for listitems not listcells. if user wants checkbox support for multicolumn lists, then they will have to implement one. are xul attributes integers? xul attributes such as left="100" or top="200", as well as corresponding properties, look as if they're integers but they are actually handled as strings. to convert them to integers use the parseint() javascript function. while the attributes are always strings per the d...

The Implementation of the Application Object Model - Archive of obsolete content
a potentially enormous and time-consuming walk through the tree in order to reorder the children of each item. but suppose that instead we could store additional information about the tree's columns, namely in which order they occur, then the act of persistently saving a column reordering would take far less time (o(1) to swap two columns, as opposed to a worst case o(n) where n is the number of cells in the tree). some of you might be saying, "wait a minute. for sorting and column reordering, you have to rebuild the whole content model anyway! why do you even need to change the intermediate representation of the data?" the answer is simple: persistence. changes such as sorting and column ordering must be remembered across application sessions, and that means that these changes to the intermed...

colorpicker - Archive of obsolete content
attributes disabled, color, onchange, preference, tabindex, type properties accessibletype, color, disabled, open, tabindex, value examples <colorpicker/> attributes disabled type: boolean indicates whether the element is disabled or not. if this attribute is set, the element is disabled. disabled elements are usually drawn with grayed-out text. ...

listbox - Archive of obsolete content
r of rows in the element, use the getrowcount method. seltype type: one of the values below used to indicate whether multiple selection is allowed. single only one row may be selected at a time. (default in listbox and richlistbox.) multiple multiple rows may be selected at once. (default in tree.) for trees, you can also use the following values: cell individual cells can be selected text rows are selected; however, the selection highlight appears only over the text of the primary column. for richlistbox, this is new in firefox 3.5. suppressonselect type: boolean if this attribute is not specified, a select event is fired whenever an item is selected, either by the user or by calling one of the select methods. if set to true, the select even...

listcell - Archive of obsolete content
attributes crop, disabled, image, label, type properties disabled style classes listcell-iconic, examples (example needed) attributes crop type: one of the values below if the label of the element is too big to fit in its given space, the text will be cropped on the side specified by the crop attribute. ...

richlistbox - Archive of obsolete content
ion is available in the preferences system article. seltype type: one of the values below used to indicate whether multiple selection is allowed. single only one row may be selected at a time. (default in listbox and richlistbox.) multiple multiple rows may be selected at once. (default in tree.) for trees, you can also use the following values: cell individual cells can be selected text rows are selected; however, the selection highlight appears only over the text of the primary column. for richlistbox, this is new in firefox 3.5. suppressonselect type: boolean if this attribute is not specified, a select event is fired whenever an item is selected, either by the user or by calling one of the select methods. if set to true, the select eve...

treecell - Archive of obsolete content
[ examples | attributes | properties | methods | related ] a single cell in a tree. this element should be placed inside a treerow. you can set the text for the cell using the label attribute. more information is available in the xul tutorial. attributes editable, label, mode, properties, ref, src, value attributes editable type: boolean allows the contents of individual cells in the column to be changed, especially useful when <treecol type="checkbox">. also useful for disabling editing of individual treecells. when the user double-clicks an editable cell, a text field appears in which the user can edit the contents of the cell. the tree and treecol must also be marked as editable in order for this to work. the tree must be a content tree for this to work on treec...

ActiveXObject - Archive of obsolete content
("excel.sheet"); this code starts the application creating the object (in this case, a microsoft excel worksheet). once an object is created, you refer to it in code using the object variable you defined. in the following example, you access properties and methods of the new object using the object variable excelsheet and other excel objects, including the application object and the activesheet.cells collection. // make excel visible through the application object. excelsheet.application.visible = true; // place some text in the first cell of the sheet. excelsheet.activesheet.cells(1,1).value = "this is column a, row 1"; // save the sheet. excelsheet.saveas("c:\\test.xls"); // close excel with the quit method on the application object. excelsheet.application.quit(); requirements supported...

Fixing Table Inheritance in Quirks Mode - Archive of obsolete content
ll cases with a single css2 rule. tables and inheritance in css terms, tables are like any other element when it comes to inheritance. if a css property can be inherited, then table elements and their components (tr, td, etc.) should inherit just as any other element would. for example, if an author writes: <style type="text/css"> body {font-size: 11px;} </style> ...then the text inside table cells should also be 11 pixels in size. browsers from the version-four era, however, treated tables differently. in these browsers, a table's text would be the same size as the user's default settings, regardless of the css assigned to ancestor elements such as body. this represented a violation of css inheritance rules, and led many authors to create workarounds such as: <style type="text/css"> body...

Alignment subject - MDN Web Docs Glossary: Definitions of Web-related terms
is the thing (or things) being aligned by the property. for justify-self and align-self, the alignment subject is the margin box of the box the property is set on, using the writing mode of that box. for justify-content and align-content, the writing mode of the box is also used. the definition of the alignment subject depends on the layout mode being used. block containers (including table cells) the entire content of the block as a single unit. multicol containers the column boxes, with any spacing inserted between column boxes added to the relevant column gaps. flex containers for justify-content, the flex items in each flex line. for align-content, the flex lines. note, this only has an effect on multi-line flex containers. grid containers the grid tracks in the appropriate ax...

Grid Areas - MDN Web Docs Glossary: Definitions of Web-related terms
a grid area is one or more grid cells that make up a rectangular area on the grid. grid areas are created when you place an item using line-based placement or when defining areas using named grid areas. grid areas must be rectangular in nature; it is not possible to create, for example, a t- or l-shaped grid area. in the example below i have a grid container with two grid items. i have named these with the grid-area property and then laid them out on the grid using grid-template-areas. this creates two grid areas, one covering four grid cells, the other two. * {box-sizing: border-box;} .wrapper { border: 2px solid #f76707; border-radius: 5px; background-color: #fff4e6; } .wrapper > div { border: 2px solid #ffa94d; border-radius: 5px; background-color: #f...

Index - MDN Web Docs Glossary: Definitions of Web-related terms
d still delivers essential content and functionality in older browsers. 179 grid css, css grid, glossary a css grid is defined using the grid value of the display property; you can define columns and rows on your grid using the grid-template-rows and grid-template-columns properties. 180 grid areas css, css grids, reference a grid area is one or more grid cells that make up a rectangular area on the grid. grid areas are created when you place an item using line-based placement or when defining areas using named grid areas. 181 grid axis css, css grids css grid layout is a two-dimensional layout method enabling the laying out of content in rows and columns. therefore in any grid we have two axes. the block or column axis, and the inl...

HTML: A good basis for accessibility - Learn web development
r. for example: don't use dashes if you can avoid it. instead of writing 5–7, write 5 to 7. expand abbreviations — instead of writing jan, write january. expand acronyms, at least once or twice. instead of writing html in the first instance, write hypertext markup language. page layouts in the bad old days, people used to create page layouts using html tables — using different table cells to contain the header, footer, sidebar, main content column, etc. this is not a good idea because a screen reader will likely give out confusing readouts, especially if the layout is complex and has many nested tables. try our example table-layout.html example, which looks something like this: <table width="1200"> <!-- main heading row --> <tr id="heading"> <td colspan="6"> ...

HTML: A good basis for accessibility - Learn web development
r. for example: don't use dashes if you can avoid it. instead of writing 5–7, write 5 to 7. expand abbreviations — instead of writing jan, write january. expand acronyms, at least once or twice. instead of writing html in the first instance, write hypertext markup language. page layouts in the bad old days, people used to create page layouts using html tables — using different table cells to contain the header, footer, sidebar, main content column, etc. this is not a good idea because a screen reader will likely give out confusing readouts, especially if the layout is complex and has many nested tables. try our example table-layout.html example, which looks something like this: <table width="1200"> <!-- main heading row --> <tr id="heading"> <td colspan="6"> ...

WAI-ARIA basics - Learn web development
at a form input needs to be filled in to be valid, whereas aria-labelledby="label" allows you to put an id on an element, then reference it as being the label for anything else on the page, including multiple elements, which is not possible using <label for="input">. as an example, you could use aria-labelledby to specify that a key description contained in a <div> is the label for multiple table cells, or you could use it as an alternative to image alt text — specify existing information on the page as an image's alt text, rather than having to repeat it inside the alt attribute. you can see an example of this at text alternatives. states — special properties that define the current conditions of elements, such as aria-disabled="true", which specifies to a screenreader that a form input i...

Styling tables - Learn web development
text-align: right; } there is nothing really specific to tables here; we are generally tweaking the font styling to make things easier to read: we have set a global sans-serif font stack; this is purely a stylistic choice. we've also set our custom font on the headings inside the <thead> and <tfoot> elements, for a nice grungy, punky look. we've set some letter-spacing on the headings and cells, as we feel it aids readability. again, mostly a stylistic choice. we've center-aligned the text in the table cells inside the <tbody> so that they line up with the headings. by default, cells are given a text-align value of left, and headings are given a value of center, but generally it looks better to have the alignments set the same for both. the default bold weight on the heading fonts is e...

Grids - Learn web development
<aside><h2>other things</h2> <p>nam vulputate diam nec tempor bibendum. donec luctus augue eget malesuada ultrices. phasellus turpis est, posuere sit amet dapibus ut, facilisis sed est.</p> </aside> <footer>contact me@mysite.com</footer> </div> the rules for grid-template-areas are as follows: you need to have every cell of the grid filled. to span across two cells, repeat the name. to leave a cell empty, use a . (period). areas must be rectangular — you can’t have an l-shaped area for example. areas can't be repeated in different locations. you can play around with our layout, changing the footer to only sit underneath the content and the sidebar to span all the way down for example. this is a very nice way to describe a layout as it is obvious fr...

Assessment: Structuring planet data - Learn web development
ble off by giving it an outer container, a table header, and a table body. you don't need a table footer for this example. add the provided caption to your table. add a row to the table header containing all the column headers. create all the content rows inside the table body, remembering to make all the row headings into headings semantically. ensure all the content is placed into the right cells — in the raw data, each row of planet data is shown next to its associated planet. add attributes to make the row and column headers unambiguously associated with the rows, columns, or rowgroups that they act as headings for. add a black border just around the column that contains all the planet name row headers. hints and tips the first cell of the header row needs to be blank, and span...

HTML Tables - Learn web development
tion to html. note: if you are working on a computer/tablet/other device where you don't have the ability to create your own files, you could try out (most of) the code examples in an online coding program such as jsbin or glitch. guides this module contains the following articles: html table basics this article gets you started with html tables, covering the very basics such as rows and cells, headings, making cells span multiple columns and rows, and how to group together all the cells in a column for styling purposes. html table advanced features and accessibility this module looks at some more advanced features of html tables — such as captions/summaries and grouping your rows into table head, body and footer sections — as well as looking at the accessibility of tables for vi...

Gecko info for Windows accessibility vendors
ort event_scrollingend and isimpledomnode::scrollto(), explained below. we do not currently support state_moveable, state_sizeable or state_marqueed. we do not currently support role_system_row, although internet explorer doesn't either, and the reason seems apparent. it is not obvious where the role_system_row should exist in the tree when the html rowspan attribute is used to combine to cells in different rows. there are currently two techniques for parsing tables: 1) use acclocation() to get the coordinates for each cell and feed that into an algorithm that builds up your own table data structure, or 2) use isimpledomnode and parse the table see below for the complete list of roles and notes about what we support intentional differences with internet explorer for the most ...

Gecko's "Almost Standards" Mode
ng mode referred to as "almost standards" mode. this is added to the long-standing "quirks" and "standards" modes. "almost standards" rendering mode is exactly the same as "standards" mode in all details save one, where it works like "quirks" mode: the height calculations for line boxes and some of the inline elements in them. a common case that this affects is the layout of images inside table cells. this means that sliced-images-in-tables layouts are less likely to fall apart in gecko-based browsers based on the rendering engine found in mozilla 1.0.1 or later when in either "quirks" or "almost standards" mode. (see the devedge article "images, tables, and mysterious gaps" for a detailed explanation of how such layouts are treated in "standards" mode.) in slightly more detail, what differs...

A guide to searching crash reports
the results will be spread across multiple pages, which you can visit by clicking the links at the top right of the tab. the links within the results do the following things. the link in each "crash id" column cell links to an individual crash report. the links in each "signature" column cell have the same effect that they did in the "signature facet" tab. the links in the remaining column cells also let you perform a narrower subsequent search with that link's value added to the search criteria. a narrower search you can add criteria to perform a narrower search. for example, to perform a search for all mac crash reports that occurred while javascript garbage collection was running, do the following. add "mac os x" to the "platform" field. select "new line", and then choose a fie...

ROLE_ROW
also, see role_table. ...

ROLE_TABLE
also refer to the following roles: role_columnheader, role_rowheader, role_column, role_row, role_cell. ...

Gecko Roles
hat provides easy access to frequently used features. role_statusbar represents a status bar, which is an area at the bottom of a window that displays information about the current operation, state of the application, or selected object. the status bar has multiple fields, which display different kinds of information. role_table represents a table that contains rows and columns of cells, and optionally, row headers and column headers. role_columnheader represents a column header, providing a visual label for a column in a table. role_rowheader represents a row header, which provides a visual label for a table row. role_column represents a column of cells within a table. role_row represents a row of cells within a table. role_cell represent...

nsIAccessibleTableCell
1.0 66 introduced gecko 1.9.2 inherits from: nsisupports last changed in gecko 1.9.2 (firefox 3.6 / thunderbird 3.1 / fennec 1.0) method overview boolean isselected(); attributes attribute type description columnextent long return the number of columns occupied by this cell. the result differs from 1 if the specified cell spans multiple columns. read only. columnheadercells nsiarray return an array of column header cells for this cell. read only. columnindex long return column index of this cell. read only. rowextent long return the number of rows occupied by this accessible cell. the result differs from 1 if the specified cell spans multiple rows. read only. rowheadercells nsiarray return an array of row header cells for this cell. read only. rowindex long ...

nsISelectionPrivate
ller for available constants). read only. constants constant value description endofprecedingline 0 startofnextline 1 tableselection_none 0 tableselection_cell 1 tableselection_row 2 tableselection_column 3 tableselection_table 4 tableselection_allcells 5 methods addselectionlistener() void addselectionlistener( in nsiselectionlistener newlistener ); parameters newlistener endbatchchanges() will resume user interface updates after a previous call to startbatchchanges(). void endbatchchanges(); parameters none. native code only!getcachedframeoffset returns cached value for nstextframe::getpointfromoffset. void...

Working with data
n type. if the conversion isn't possible, typeerror is thrown. the resulting data is then copied into a new cdata object. if the original value is already a cdata object, the original object is simply duplicated directly into the new one. if type is an array type of unspecified length, the following steps are taken: if the value is a size value, a new array of that length is created, with its cells ready to accept values of the same type as those in the specified array. this is the same as new arraytype(type.elementtype, value). if the type represents a javascript string (that is, an array of jschar characters followed by a null terminator), a copy of that string is created and returned. if the type is an array of 8-bit characters and value is a utf-16 string, the new cdata object is the ...

Cookies - Firefox Developer Tools
d time when the cookie was created. hostonly — is this cookie a domain cookie? that is, the domain value matches exactly the domain of the current website. note: some of the columns are not shown by default — to change the column display, right-click on the existing table headings and use the resulting context menu to show/hide the columns. you can edit cookies by double-clicking inside cells in the table widget and editing the values they contain, and add new cookies by clicking the "plus" (+) button and then editing the resulting new row to the value you want. context menu the context menu for each cookie includes the following commands: add item - add a new cookie. delete <cookie name>.<domain> - deletes the selected cookie delete all from <domain> - deletes all cookies from...

Local Storage / Session Storage - Firefox Developer Tools
when an origin corresponding to local storage or session storage is selected within the storage inspector, the names and values of all the items corresponding to local storage or session storage will be listed in a table. you can edit local and session storage items by double-clicking inside cells in the table widget and editing the values they contain: you can delete local storage and session storage entries using the context menu: you can also delete local and session storage entries by selecting an item and pressing the delete or backspace key. finally, you can add new storage items by clicking the "plus" (+) button and then editing the resulting new row to the value you want. ...

Introduction to the DOM - Web APIs
script, but it uses the dom to access the document and its elements. the dom is not a programming language, but without it, the javascript language wouldn't have any model or notion of web pages, html documents, xml documents, and their component parts (e.g. elements). every element in a document—the document as a whole, the head, tables within the document, table headers, text within the table cells—is part of the document object model for that document, so they can all be accessed and manipulated using the dom and a scripting language like javascript. in the beginning, javascript and the dom were tightly intertwined, but eventually, they evolved into separate entities. the page content is stored in the dom and may be accessed and manipulated via javascript, so that we may write this appr...

Element.getElementsByTagName() - Web APIs
pty. element is the element from where the search starts. only the element's descendants are included, not the element itself. tagname is the qualified name to look for. the special string "*" represents all elements. for compatibility with xhtml, lower-case should be used. example // check the status of each data cell in a table const table = document.getelementbyid('forecast-table'); const cells = table.getelementsbytagname('td'); for (let cell of cells) { let status = cell.getattribute('data-status'); if (status === 'open') { // grab the data } } specifications specification status comment domthe definition of 'element.getelementsbytagname()' in that specification. living standard changed the return value from nodelist to htmlcollection ...

HTMLTableElement.cellPadding - Web APIs
syntax htmltableelement.cellpadding = padding; var padding = htmltableelement.cellpadding; padding is either a number of pixels (e.g. "10") or a percentage value (e.g. "10%"). ...

HTMLTableElement.rules - Web APIs
the htmltableelement.rules property indicates which cell borders to render in the table. ...

HTMLTableRowElement.insertCell() - Web APIs
as would be the case if document.createelement() had been used to create the new <td> element. you can not use insertcell() to create a new <th> element though. syntax var newcell = htmltablerowelement.insertcell(index); htmltablerowelement is a reference to an html <tr> element. parameters index optional index is the cell index of the new cell. if index is -1 or equal to the number of cells, the cell is appended as the last cell in the row. if index is greater than the number of cells, an indexsizeerror exception will result. if index is omitted it defaults to -1. return value newcell is an htmltablecellelement that references the new cell. example this example uses htmltableelement.insertrow() to append a new row to a table. we then use insertcell(0) to insert a new cell in t...

ARIA Screen Reader Implementors Guide - Accessibility
for the same region. it is probably desirable to have at least a tiny timeout before presenting atomic region changes, in order to avoid presenting the region twice for two changes that occur quickly one after the other. include labels when presenting changes: if the change occurs in something with a semantic label of some kind, speak the label. this is particularly important for changes in data cells, where the column and row headers provide important contextual information. ideas for settings and heuristics allow for a different voice (in text-to-speech) or other varying presentational characteristics to set live changes apart. when no wai-aria markup is present, automatically present some changes unless the user configures all live changes to off. for example, automatically speak change...

Using the status role - Accessibility
atus event to assistive technology products which can then notify the user about it. status information content must be provided within a status object, and it should be ensured that this object does not receive focus. if another part of the page controls what appears in the status, the relationship should be made explicit via the aria-controls attribute. assistive technologies may reserve some cells of a braille display to render the status. possible effects on user agents and assistive technology when the status role is added to an element, or such an element becomes visible, the user agent should do the following: expose the element as having a status role in the operating system's accessibility api. fire an accessible status event using the operating system's accessibility api if ...

ARIA Test Cases - Accessibility
ted at behavior: (mz) screen readers should announce the current cell or row depending on the default behavior of the at in other similar situations (e. g. listviews in windows, tree tables in linux). if the current row is expandable, screen reader should indicate current state (expanded or collapsed). when the user changes the state, the new state should be spoken immediately. when navigating cells horizontally, the column header should be spoken for each cell. markup used: notes: results: at firefox ie opera safari jaws 9 - - n/a n/a jaws 10 - - - - voiceover (leopard) n/a n/a - fail window-eyes - - - - nvda - n/a - - zoom (leopard) pass n/a p...

CSS grids, logical values, and writing modes - CSS: Cascading Style Sheets
now take a look at a grid layout example, we can see how changing the writing mode means changing our idea of where the block and inline axis are. the grid in my next example has three columns and two row tracks. this means there are three tracks running down the block axis. in default writing mode, grid auto-places items starting at the top left, moving along to the right, filling up the three cells on the inline axis. it then moves onto the next line, creating a new row track, and fills in more items: * {box-sizing: border-box;} .wrapper { border: 2px solid #f76707; border-radius: 5px; background-color: #fff4e6; } .wrapper > div { border: 2px solid #ffa94d; border-radius: 5px; background-color: #ffd8a8; padding: 1em; color: #d9480f; } .wrapper { dis...

CSS Grid Layout and Accessibility - CSS: Cascading Style Sheets
those of us who have been doing web development for more years than we care to remember might consider that css grid is a little bit like using “tables for layout”. back in the early days of web design, the way we constructed page layout was to use html tables, then fragment our design into the cells of those tables in order to create a layout. this had some advantages over the “css positioning” that came afterwards, in that we could take advantage of the alignment and full height columns offered by table display. the biggest downside however was that it tied our design to the mark-up, often creating accessibility issues as it did so. in order to lay the design out in the table we often broke up the content in ways that made no sense at all when read out by a screen reader for e...

CSS Grid Layout and Progressive Enhancement - CSS: Cascading Style Sheets
in the css display specification. in the case of our item set to inline-block, this is why display: inline-block no longer applied. if you are using display: table for your legacy layout, an item set to display: table-cell generates anonymous boxes. therefore, if you use display: table-cell without any parent element set to display-table, an anonymous table wrapper is created around any adjacent cells, just as if you had wrapped them in a div or other element set to display: table. if you have an item set to display: table-cell, and then in a feature query change the parent to display: grid, this anonymous box creation will not happen. this means you can overwrite display: table based layouts, without having additional anonymous boxes. floated elements as we have already seen, float and also...

Subgrid - CSS: Cascading Style Sheets
it grid in a subgridded dimension if you need to autoplace items, and do not know how many items you will have, take care when creating a subgrid, as it will prevent additional rows being created to hold those items. take a look at the next example — it uses the same parent and child grid as in the example above, however inside the subgrid i have twelve items trying to autoplace into ten grid cells. as the subgrid is on both dimensions there is nowhere for the extra two items to go and so they go into the last track of the grid, as defined in the specification. if we remove the grid-template-rows value we enable regular creation of implicit tracks and, although these won't line up with the tracks of the parent, as many as are required will be created. the gap properties and subgrid i...

CSS Table - CSS: Cascading Style Sheets
css table is a css module that defines how to lay out table data. ...

Column combinator - CSS: Cascading Style Sheets
the column combinator (||) is placed between two css selectors. it matches only those elements matched by the second selector that belong to the column elements matched by the first. ...

Mozilla CSS extensions - CSS: Cascading Style Sheets
-moz-inline-box -moz-inline-gridobsolete since gecko 62 -moz-inline-stackobsolete since gecko 62 -moz-inline-table -moz-gridobsolete since gecko 62 -moz-grid-groupobsolete since gecko 62 -moz-grid-lineobsolete since gecko 62 -moz-groupbox -moz-deckobsolete since gecko 62 -moz-popupobsolete since gecko 62 -moz-stackobsolete since gecko 62 -moz-markerobsolete since gecko 62 empty-cells -moz-show-background (default value in quirks mode) font -moz-button -moz-info -moz-desktop -moz-dialog (also a color) -moz-document -moz-workspace -moz-window -moz-list -moz-pull-down-menu -moz-field (also a color) font-family -moz-fixed image-rendering -moz-crisp-edges <length> -moz-calc list-style-type -moz-arabic-indic -moz-bengali -moz-cjk-ea...

CSS reference - CSS: Cascading Style Sheets
umn-widthcolumnsconic-gradient()containcontentcontrast()<counter>counter-incrementcounter-resetcounter-set@counter-stylecounters()cross-fade()cubic-bezier()::cue::cue-regioncursor<custom-ident>d:defaultdeg<dimension>:dirdirection:disableddisplay<display-box><display-inside><display-internal><display-legacy><display-listitem><display-outside>dpcmdpidppxdrop-shadow()eelement()ellipse()em:emptyempty-cells:enabledenv()exffallback (@counter-style)filter<filter-function>:first:first-child::first-letter (:first-letter)::first-line (:first-line):first-of-typefit-content()<flex>flexflex-basisflex-directionflex-flowflex-growflex-shrinkflex-wrapfloat:focusfont@font-facefont-familyfont-family (@font-face)font-feature-settingsfont-feature-settings (@font-face)@font-feature-valuesfont-kerningfont-language-ov...

align-items - CSS: Cascading Style Sheets
bsolutely-positioned boxes. in static position of absolutely-positioned layouts, the keyword behaves as stretch. for flex items, the keyword behaves as stretch. for grid items, this keyword leads to a behavior similar to the one of stretch, except for boxes with an aspect ratio or an intrinsic sizes where it behaves like start. the property doesn't apply to block-level boxes, and to table cells. flex-start the cross-start margin edges of the flex items are flushed with the cross-start edge of the line. flex-end the cross-end margin edges of the flex items are flushed with the cross-end edge of the line. center the flex items' margin boxes are centered within the line on the cross-axis. if the cross-size of an item is larger than the flex container, it will overflow equally in ...

calc() - CSS: Cascading Style Sheets
s a length followed by an addition operator and a negative percentage. the * and / operators do not require whitespace, but adding it for consistency is both allowed and recommended. division by zero results in an error being generated by the html parser. math expressions involving percentages for widths and heights on table columns, table column groups, table rows, table row groups, and table cells in both auto and fixed layout tables may be treated as if auto had been specified. it is permitted to nest calc() functions, in which case the inner ones are treated as simple parentheses. formal syntax calc( <calc-sum> )where <calc-sum> = <calc-product> [ [ '+' | '-' ] <calc-product> ]*where <calc-product> = <calc-value> [ '*' <calc-value> | '/' <number> ]*where <calc-value> = <number> | <di...

clamp() - CSS: Cascading Style Sheets
out using the calc() function itself. you may also use parentheses to establish computation order when needed. you can use different units for each value in your expressions, and different units in any math function making up any of the arguments. notes math expressions involving percentages for widths and heights on table columns, table column groups, table rows, table row groups, and table cells in both auto and fixed layout tables may be treated as if auto had been specified. it is permitted to nest max() and min() functions as expression values, in which case the inner ones are treated as simple parentheses. the expressions are full math expressions, so you can use direct addition, subtraction, multiplication and division without using the calc() function itself. the expression can b...

cursor - CSS: Cascading Style Sheets
age of a pointing hand. progress the program is busy in the background, but the user can still interact with the interface (in contrast to wait). wait the program is busy, and the user can't interact with the interface (in contrast to progress). sometimes an image of an hourglass or a watch. selection cell the table cell or set of cells can be selected. crosshair cross cursor, often used to indicate selection in a bitmap. text the text can be selected. typically the shape of an i-beam. vertical-text the vertical text can be selected. typically the shape of a sideways i-beam. drag & drop alias an alias or shortcut is to be created. ...

direction - CSS: Cascading Style Sheets
us a pull request. note that text direction is usually defined within a document (e.g., with html's dir attribute) rather than through direct use of the direction property. the property sets the base text direction of block-level elements and the direction of embeddings created by the unicode-bidi property. it also sets the default alignment of text, block-level elements, and the direction that cells flow within a table row. unlike the dir attribute in html, the direction property is not inherited from table columns into table cells, since css inheritance follows the document tree, and table cells are inside of rows but not inside of columns. the direction and unicode-bidi properties are the two only properties which are not affected by the all shorthand property. syntax /* keyword values...

justify-items - CSS: Cascading Style Sheets
[ first | last ]? baseline<overflow-position> = unsafe | safe<self-position> = center | start | end | self-start | self-end | flex-start | flex-end examples simple demonstration in the following example we have a simple 2 x 2 grid layout. initially the grid container is given a justify-items value of stretch (the default), which causes the grid items to stretch across the entire width of their cells. if you hover or tab onto the grid container however, it is given a justify-items value of center, which causes the grid items to span only as wide as their content width, and align in the center of their cells. html <article class="container" tabindex="0"> <span>first child</span> <span>second child</span> <span>third child</span> <span>fourth child</span> </article> css html { fo...

justify-self - CSS: Cascading Style Sheets
st | last ]? baseline<overflow-position> = unsafe | safe<self-position> = center | start | end | self-start | self-end | flex-start | flex-end examples simple demonstration in the following example we have a simple 2 x 2 grid layout. initially the grid container is given a justify-items value of stretch — the default — which causes the grid items to stretch across the entire width of their cells. the second, third, and fourth grid items are then given different values of justify-self, to show how these override the justify-items value. these values cause the grid items to span only as wide as their content width, and align in different positions across their cells. html <article class="container"> <span>first child</span> <span>second child</span> <span>third child</span> <spa...

max() - CSS: Cascading Style Sheets
s, such as attr(), that evaluate to a valid argument type (like <length>), or nested min() and max() functions. you can use different units for each value in your expression. you may also use parentheses to establish computation order when needed. notes math expressions involving percentages for widths and heights on table columns, table column groups, table rows, table row groups, and table cells in both auto and fixed layout tables may be treated as if auto had been specified. it is permitted to nest min() and other max() functions as expression values. the expressions are full math expressions, so you can use direct addition, subtraction, multiplication and division without using the calc() function itself. the expression can be values combining the addition ( + ), subtraction ( - ), ...

min() - CSS: Cascading Style Sheets
ues, or other expressions, such as attr(), that evaluate to a valid argument type (like <length>). you can use different units for each value in your expression, if you wish. you may also use parentheses to establish computation order when needed. notes math expressions involving percentages for widths and heights on table columns, table column groups, table rows, table row groups, and table cells in both auto and fixed layout tables may be treated as if auto had been specified. it is permitted to nest max() and other min() functions as expression values. the expressions are full math expressions, so you can use direct addition, subtraction, multiplication and division without using the calc() function itself. the expression can be values combining the addition ( + ), subtraction ( - ), ...

vertical-align - CSS: Cascading Style Sheets
owed. line-relative values the following values vertically align the element relative to the entire line: top aligns the top of the element and its descendants with the top of the entire line. bottom aligns the bottom of the element and its descendants with the bottom of the entire line. for elements that do not have a baseline, the bottom margin edge is used instead. values for table cells baseline (and sub, super, text-top, text-bottom, <length>, and <percentage>) aligns the baseline of the cell with the baseline of all other cells in the row that are baseline-aligned. top aligns the top padding edge of the cell with the top of the row. middle centers the padding box of the cell within the row. bottom aligns the bottom padding edge of the cell with the bottom of the row.

Challenge solutions - Developer guides
age will appear in your document. then refresh your browser to see if you were correct. solution the image appears to the right of the second list. challenge add a rule to your stylesheet that places the image in the top right of your document. solution the following rule achieves the desired result: #fixed-pin { position:fixed; top: 3px; right: 3px; } tables borders on data cells only challenge change the stylesheet to make the table have a green border around only the data cells. solution the following rule puts borders around only <td> elements that are inside the <tbody> element of the table with id=demo-table: #demo-table tbody td { border:1px solid #7a7; } media separate print style file challenge move the print-specific style rules to a separate c...

HTML attribute reference - HTML: Hypertext Markup Language
d in a descending order instead of a ascending. rows <textarea> defines the number of rows in a text area. rowspan <td>, <th> defines the number of rows a table cell should span over. sandbox <iframe> stops a document loaded in an iframe from using certain features (such as submitting forms or opening new windows). scope <th> defines the cells that the header test (defined in the th element) relates to. scoped <style> selected <option> defines a value which will be selected on page load. shape <a>, <area> size <input>, <select> defines the width of the element (in pixels). if the element's type attribute is text or password then it's the number of characters. sizes ...

<colgroup> - HTML: Hypertext Markup Language
attributes this element's attributes include the global attributes. span this attribute contains a positive integer indicating the number of consecutive columns the <colgroup> element spans. if not present, its default value is 1. note: this attribute is applied on the attributes of the column group, it has no effect on the css styling rules associated with it or, even more, to the cells of the column's members of the group. the span attribute is not permitted if there are one or more <col> elements within the <colgroup>. deprecated attributes the following attributes are deprecated and should not be used. they are documented below for reference when updating existing code and for historical interest only. align this enumerated attribute specifies how horizonta...

itemref - HTML: Hypertext Markup Language
an itemscope attribute specified. note: the itemref attribute is not part of the microdata data model. it is merely a syntactic construct to aid authors in adding annotations to pages where the data to be annotated does not follow a convenient tree structure. for example, it allows authors to mark up data in a table so that each column defines a separate item while keeping the properties in the cells. example html <div itemscope id="amanda" itemref="a b"></div> <p id="a">name: <span itemprop="name">amanda</span> </p> <div id="b" itemprop="band" itemscope itemref="c"></div> <div id="c"> <p>band: <span itemprop="name">jazz band</span> </p> <p>size: <span itemprop="size">12</span> players</p> </div> structured data (in json-ld format) { "@id": "amanda", "name": "amanda", "ba...

SyntaxError: missing } after function body - JavaScript
ere is a syntax mistake when creating a function somewhere. also check if any closing curly brackets or parenthesis are in the correct order. indenting or formatting the code a bit nicer might also help you to see through the jungle. examples forgotten closing curly bracket oftentimes, there is a missing curly bracket in your function code: var charge = function() { if (sunny) { usesolarcells(); } else { promptbikeride(); }; correct would be: var charge = function() { if (sunny) { usesolarcells(); } else { promptbikeride(); } }; it can be more obscure when using iife, closures, or other constructs that use a lot of different parenthesis and curly brackets, for example. (function() { if (true) { return false; } ); oftentimes, indenting differently or double c...

<mlabeledtr> - MathML
n the right side (determined using the side attribute on the <mtable> element). child elements of <mlabeledtr> must be <mtd> elements. the first child is the label whereas all other children are representing row contents and are treated identically to children of <mtr> elements. attributes class, id, style provided for use with stylesheets. columnalign overrides the horizontal alignment of cells specified by <mtable> for this row. possible values are: left, center and right. groupalign href used to set a hyperlink to a specified uri. mathbackground the background color. you can use #rgb, #rrggbb and html color names. mathcolor the text color. you can use #rgb, #rrggbb and html color names. rowalign overrides the vertical alignment of cells specified by <mtable> for this row. p...

<mtr> - MathML
the mathml <mtr> element represents a row in a table or a matrix. it may only appear in a <mtable> element. this element is similar to the <tr> element of html. attributes class, id, style provided for use with stylesheets. columnalign overrides the horizontal alignment of cells specified by <mtable> for this row. possible values are: left, center and right. groupalign unimplemented href used to set a hyperlink to a specified uri. mathbackground the background color. you can use #rgb, #rrggbb and html color names. mathcolor the text color. you can use #rgb, #rrggbb and html color names. rowalign overrides the vertical alignment of cells specified by <mtable> for this row. possible values are: axis, baseline, bottom, center and top. specifications specification ...

Digital video concepts - Web media technologies
of color, while ycbcr was used for digital color. however, today both terms are used for digital color. the prime symbol, ', indicates that gamma compression is being used. contemplating human vision we're able to represent an image this way because the human eye sees far more detail in greyscale than in color, thanks to biology. the human eye contains two kinds of photoreceptor (light-sensing) cells. the rods are highly-sensitive light intensity sensors. the cones are less sensitive but are able to detect color. because the eye has vastly more rods than cones (about 120 million rods to around 6 or 7 million cones), we see detail in greyscale, with color being far less detailed. in essence, our eyes are like a camera with two image sensor chips: one greyscale and one color. the greyscale sen...

order - SVG: Scalable Vector Graphics
the values provided must be <integer>s greater than zero. values that are not integers will be truncated, i.e. rounded to the closest integer value towards zero. the first number, indicates the number of columns in the matrix. the second number, indicates the number of rows in the matrix. if no second number is not provided, it defaults to the first number...