TextMetrics.ideographicBaseline - Web APIs
the read-only ideographicbaseline property of the textmetrics interface is a double giving the distance from the horizontal line indicated by the canvasrenderingcontext2d.textbaseline property to the ideographic baseline of the line box, in css pixels.
... examples const canvas = document.createelement('canvas'); const ctx = canvas.getcontext('2d'); const text = ctx.measuretext('foo'); // returns textmetrics object text.ideographicbaseline; // -1.201171875; specifications specification html living standardthe definition of 'textmetrics.ideographicbaseline' in that specification.

ideographic - SVG: Scalable Vector Graphics
the ideographic attribute indicates the alignment coordinate for glyphs to achieve ideographic baseline alignment for horizontally oriented glyph layouts.
... specifications specification status comment scalable vector graphics (svg) 1.1 (second edition)the definition of 'ideographic' in that specification.

v-ideographic - SVG: Scalable Vector Graphics
the v-ideographic attribute indicates the alignment coordinate for glyphs to achieve ideographic baseline alignment for vertically oriented glyph layouts.
... specifications specification status comment scalable vector graphics (svg) 1.1 (second edition)the definition of 'v-ideographic' in that specification.

initial-letter-align - CSS: Cascading Style Sheets
/* keyword values */ initial-letter-align: auto; initial-letter-align: alphabetic; initial-letter-align: hanging; initial-letter-align: ideographic; /* global values */ initial-letter-align: inherit; initial-letter-align: initial; initial-letter-align: unset; syntax one of the keyword values listed below.
...western languages would default to alphabetic, cjk languages to ideographic, and some indic languages to hanging.
... ideographic the initial letter is centered in the n-line area.
...And 2 more matches

CanvasRenderingContext2D.textBaseline - Web APIs
syntax ctx.textbaseline = "top" || "hanging" || "middle" || "alphabetic" || "ideographic" || "bottom"; options possible values: "top" the text baseline is the top of the em square.
... "ideographic" the text baseline is the ideographic baseline; this is the bottom of the body of the characters, if the main body of characters protrudes beneath the alphabetic baseline.
...this differs from the ideographic baseline in that the ideographic baseline doesn't consider descenders.
... html <canvas id="canvas" width="550" height="500"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const baselines = ['top', 'hanging', 'middle', 'alphabetic', 'ideographic', 'bottom']; ctx.font = '36px serif'; ctx.strokestyle = 'red'; baselines.foreach(function (baseline, index) { ctx.textbaseline = baseline; const y = 75 + index * 75; ctx.beginpath(); ctx.moveto(0, y + 0.5); ctx.lineto(550, y + 0.5); ctx.stroke(); ctx.filltext('abcdefghijklmnop (' + baseline + ')', 0, y); }); result specifications specification status comment html living standar...

dominant-baseline - SVG: Scalable Vector Graphics
200 120" xmlns="http://www.w3.org/2000/svg"> <path d="m20,20 l180,20 m20,50 l180,50 m20,80 l180,80" stroke="grey" /> <text dominant-baseline="baseline" x="30" y="20">baseline</text> <text dominant-baseline="middle" x="30" y="50">middle</text> <text dominant-baseline="hanging" x="30" y="80">hanging</text> </svg> usage notes value auto | text-bottom | alphabetic | ideographic | middle | central | mathematical | hanging | text-top default value auto animatable yes auto if this property occurs on a <text> element, then the computed value depends on the value of the writing-mode attribute.
... ideographic the baseline-identifier for the dominant-baseline is set to be ideographic, the derived baseline-table is constructed using the ideographic baseline-table in the font, and the baseline-table font-size is changed to the value of the font-size attribute on this element.
...that font baseline-table is chosen using the following priority order of baseline-table names: ideographic, alphabetic, hanging, mathematical.
...that font baseline-table is chosen using the following priority order of baseline-table names: alphabetic, ideographic, hanging, mathematical.

IME handling guide
however, if the last composition string is only an ideographic space (fullwidth space), the composition string may be a placeholder of some old chinese ime on windows.
...the reason is, inputting an ideographic space causes a composition.
...however, if the last composition string is only an ideographic space, it shouldn't be committed.

list-style-type - CSS: Cascading Style Sheets
the cjk-ideographic is identical to trad-chinese-informal; it exists for legacy reasons.
...is unsupported in ie7 and earlier arabic-indic -moz-arabic-indic example armenian traditional armenian numbering (ayb/ayp, ben/pen, gim/keem… bengali -moz-bengali example cambodian * example is a synonym for khmer cjk-earthly-branch -moz-cjk-earthly-branch example cjk-heavenly-stem -moz-cjk-heavenly-stem example cjk-ideographic identical to trad-chinese-informal e.g.
... defines using @counter-style the usual style types: hebrew, cjk-ideographic, hiragana, hiragana-iroha, katakana, katakana-iroha, japanese-formal, japanese-informal, simp-chinese-formal, trad-chinese-formal, simp-chinese-formal, trad-chinese-formal,korean-hangul-formal, korean-hanja-informal, korean-hanja-formal, cjk-decimal, ethiopic-numeric, disclosure-open and disclosure-closed.

glyph-orientation-vertical - SVG: Scalable Vector Graphics
as a presentation attribute, it can be applied to any element but it has effect only on the following five elements: <altglyph>, <textpath>, <text>, <tref>, and <tspan> context notes value auto | <angle> default value auto animatable no auto fullwidth ideographic and fullwidth latin text will be set with a glyph orientation of 0 degrees.
... ideographic punctuation and other ideographic characters having alternate horizontal and vertical forms will use the vertical form of the glyph.
... this reorientation rule applies only to the first-level non-ideographic text.

-ms-text-autospace - Archive of obsolete content
ideograph-alpha creates extra spacing between runs of ideographic and non-ideographic text, such as latin-based, cyrillic, greek, arabic, or hebrew text.
... ideograph-numeric creates extra spacing between runs of ideographic text and numeric characters.

TextMetrics - Web APIs
textmetrics.ideographicbaseline read only is a double giving the distance from the horizontal line indicated by the canvasrenderingcontext2d.textbaseline property to the ideographic baseline of the line box, in css pixels.
... html <canvas id="canvas" width="550" height="500"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const baselinesabovealphabetic = ['fontboundingboxascent', 'actualboundingboxascent', 'emheightascent', 'hangingbaseline']; const baselinesbelowalphabetic = ['ideographicbaseline', 'emheightdescent', 'actualboundingboxdescent', 'fontboundingboxdescent']; const baselines = [...baselinesabovealphabetic, ...baselinesbelowalphabetic]; ctx.font = '25px serif'; ctx.strokestyle = 'red'; baselines.foreach(function (baseline, index) { let text = 'abcdefghijklmnop (' + baseline + ')'; let textmetrics = ctx.measuretext(text); let y = 50 + index * 50...

SVG Presentation Attributes - SVG: Scalable Vector Graphics
value: auto|baseline|before-edge|text-before-edge|middle|central|after-edge|text-after-edge|ideographic|alphabetic|hanging|mathematical|inherit; animatable: yes baseline-shift it allows repositioning of the dominant-baseline relative to the dominant-baseline of the parent text content element.
... value: auto|text-bottom|alphabetic|ideographic|middle|central| mathematical|hanging|text-top; animatable: yes enable-background deprecated since svg 2 it tells the browser how to manage the accumulation of the background image.

alignment-baseline - SVG: Scalable Vector Graphics
as a presentation attribute, it can be applied to any element but it has effect only on the following four elements: <tspan>, <tref>, <altglyph>, and <textpath> usage notes value auto | baseline | before-edge | text-before-edge | middle | central | after-edge | text-after-edge | ideographic | alphabetic | hanging | mathematical | top | center | bottom default value auto animatable yes auto the value is the dominant-baseline of the script to which the character belongs - i.e., use the dominant-baseline of the parent.
... ideographic matches the box’s ideographic character face under-side baseline to that of its parent.

SVG Attribute reference - SVG: Scalable Vector Graphics
fill-rule filter filterres filterunits flood-color flood-opacity font-family font-size font-size-adjust font-stretch font-style font-variant font-weight format from fr fx fy g g1 g2 glyph-name glyph-orientation-horizontal glyph-orientation-vertical glyphref gradienttransform gradientunits h hanging height href hreflang horiz-adv-x horiz-origin-x i id ideographic image-rendering in in2 intercept k k k1 k2 k3 k4 kernelmatrix kernelunitlength kerning keypoints keysplines keytimes l lang lengthadjust letter-spacing lighting-color limitingconeangle local m marker-end marker-mid marker-start markerheight markerunits markerwidth mask maskcontentunits maskunits mathematical max media method min mode n name nu...
...cap stroke-linejoin stroke-miterlimit stroke-opacity stroke-width style surfacescale systemlanguage t tabindex tablevalues target targetx targety text-anchor text-decoration text-rendering textlength to transform transform-origin type u u1 u2 underline-position underline-thickness unicode unicode-bidi unicode-range units-per-em v v-alphabetic v-hanging v-ideographic v-mathematical values vector-effect version vert-adv-y vert-origin-x vert-origin-y viewbox viewtarget visibility w width widths word-spacing writing-mode x x x-height x1 x2 xchannelselector xlink:actuate xlink:arcrole xlink:href xlink:role xlink:show xlink:title xlink:type xml:base xml:lang xml:space y y y1 y2 ychannelselector z z zoomandpan s...

SVG documentation index - SVG: Scalable Vector Graphics
106 ideographic deprecated, svg, svg attribute the ideographic attribute indicates the alignment coordinate for glyphs to achieve ideographic baseline alignment for horizontally oriented glyph layouts.
... 236 v-ideographic deprecated, svg, svg attribute the v-ideographic attribute indicates the alignment coordinate for glyphs to achieve ideographic baseline alignment for vertically oriented glyph layouts.