HTMLIFrameElement.getCanGoBack()
the getcangoback() method of the htmliframeelement interface is used to indicate whether it's possible to go back in the navigation history of the browser <iframe>.
... syntax instanceofhtmliframeelement.getcangoback() .then(function(result) { ...
... example function canmovebwd() { browser.getcangoback().then(function(result) { if (result) { back.disabled = false; console.log("it's possible to navigate the history backward."); } else { back.disabled = true; console.log("it's not possible to navigate the history backward."); } }); } specification not part of any specification.

HTMLIFrameElement.goBack()
the goback() method of the htmliframeelement interface is used to navigate backwards in the browser <iframe>'s history.
... syntax instanceofhtmliframeelement.goback(); returns void.
... examples back.addeventlistener('touchend',function() { browser.goback(); }); specification not part of any specification.

goBack - Archive of obsolete content
« xul reference home goback() return type: no return value go back one page in the history.

goBackGroup - Archive of obsolete content
« xul reference home gobackgroup() not in firefox return type: no return value returns to the previous group of tabs.

canGoBack - Archive of obsolete content
« xul reference cangoback type: boolean this read-only property is true if there is a page to go back to in the session history and the back button should be enabled.

tabbrowser - Archive of obsolete content
attributes autocompleteenabled, autocompletepopup, autoscroll, contentcontextmenu, contenttooltip, handlectrlpageupdown, onbookmarkgroup, onnewtab, tabmodalpromptshowing properties browsers, cangoback, cangoforward, contentdocument, contenttitle, contentvieweredit, contentviewerfile, contentwindow, currenturi, docshell, documentcharsetinfo, homepage, markupdocumentviewer, securityui, selectedbrowser, selectedtab, sessionhistory, tabcontainer, tabs, visibletabs, webbrowserfind, webnavigation, webprogress methods addprogresslistener, addtab, addtabsprogresslistener,appendgroup, getbrowseratind...
...ex, getbrowserindexfordocument, getbrowserfordocument, getbrowserfortab, geticon, getnotificationbox, gettabforbrowser, gettabmodalpromptbox, goback, gobackgroup, goforward, goforwardgroup, gohome, gotoindex, loadgroup, loadonetab, loadtabs, loaduri, loaduriwithflags, movetabto, pintab, reload, reloadalltabs, reloadtab, reloadwithflags, removealltabsbut, removecurrenttab, removeprogresslistener, removetab, removetabsprogresslistener,replacegroup, selecttabatindex, seticon, showonlythesetabs, stop, unpintab attributes autocompleteenabled type: boolean set to true to enable autocomplete of fields.
... cangoback type: boolean this read-only property is true if there is a page to go back to in the session history and the back button should be enabled.
...And 3 more matches

browser - Archive of obsolete content
attributes autocompleteenabled, autocompletepopup, autoscroll, disablehistory, disableglobalhistory, disablesecurity, droppedlinkhandler, homepage, showcaret, src, type properties accessibletype, cangoback, cangoforward, contentdocument, contentprincipal, contenttitle, contentvieweredit, contentviewerfile, contentwindow, currenturi, docshell, documentcharsetinfo, homepage, markupdocumentviewer, messagemanager, preferences, securityui, sessionhistory, webbrowserfind, webnavigation, webprogress methods addprogresslistener, goback, goforward, gohome, gotoindex, loaduri, loaduriwithflags, reload, ...
... cangoback type: boolean this read-only property is true if there is a page to go back to in the session history and the back button should be enabled.
...most of its methods are callable directly on the element itself, such as goback and goforward.
... goback() return type: no return value go back one page in the history.

Using the Browser API
cript implementation to wire up the functionality required by our simple browser, we've written some basic javascript (see the full javascript listing.) wiring up the back and forward buttons early on in the code we implement two simple event listeners to move the browser back and forward in history when the relevant buttons are pressed: back.addeventlistener('touchend',function() { browser.goback(); }); fwd.addeventlistener('touchend',function() { browser.goforward(); }); the functions can be handled using the browser api htmliframeelement.goback() and htmliframeelement.goforward() methods.
...we did this with the following functions: function canmovebwd() { var request = browser.getcangoback(); request.onsuccess = function() { if (request.result) { back.disabled = false; console.log("it's possible to navigate the history backward."); } else { back.disabled = true; console.log("it's not possible to navigate the history backward."); } } } function canmovefwd() { var request = browser.getcangoforward(); request.onsuccess = function() { ...
...these use htmliframeelement.getcangoback() and htmliframeelement.getcangoforward(), which return a boolean defining whether backward/forward navigation is possible at this point in the history.
...for example: function canmovebwd() { browser.getcangoback().then(function(result) { if (result) { back.disabled = false; console.log("it's possible to navigate the history backward."); } else { back.disabled = true; console.log("it's not possible to navigate the history backward."); } }); } implementing the url bar the url bar for our simple browser is a <form> containing a single text <input>.

nsIWebNavigation
method overview void goback void goforward void gotoindex( in long index ) void loaduri(in wstring uri , in unsigned long loadflags , in nsiuri referrer , in nsiinputstream postdata, in nsiinputstream headers) void reload(in unsigned long reloadflags) void stop(in unsigned long stopflags) constants load flags constant value description load_flags...
... attributes attribute type description cangoback prbool indicates if the object can go back.
... methods goback() tells the object to navigate to the previous session history item.
... void goback( ); goforward() tells the object to navigate to the next session history item.

Index - Archive of obsolete content
1242 goback xul methods, xul reference no summary!
... 1243 gobackgroup xul methods, xul reference no summary!
... 1367 cangoback xul properties, xul reference no summary!

Index - Archive of obsolete content
511 goback xul methods, xul reference no summary!
... 512 gobackgroup xul methods, xul reference no summary!
... 636 cangoback xul properties, xul reference no summary!

nsISHistoryListener
method overview boolean onhistorygoback(in nsiuri abackuri); boolean onhistorygoforward(in nsiuri aforwarduri); boolean onhistorygotoindex(in long aindex, in nsiuri agotouri); void onhistorynewentry(in nsiuri anewuri); boolean onhistorypurge(in long anumentries); boolean onhistoryreload(in nsiuri areloaduri, in unsigned long areloadflags); methods onhistorygoback() called when navigating to a previous session history entry...
..., for example due to an nsiwebnavigation.goback() call.
... boolean onhistorygoback( in nsiuri abackuri ); parameters abackuri the uri of the session history entry being navigated to.

Browser API
htmliframeelement.getcangoback() indicates whether it's possible to navigate backwards.
... htmliframeelement.goback() changes the location of the <iframe> for the previous location in its browsing history.

Chapter 3: Introduction to XUL—How to build a more intuitive UI - Archive of obsolete content
functions like back, forward, reload can all be called using the goback(), goforward(), and reload() methods.

Introduction to XUL - Archive of obsolete content
this tie is defined within the xul: <xul:window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> <broadcaster id="cangoback"/> <titledbutton src="resource:/res/toolbar/tb_back.gif" align="bottom" value="back" onclick="browserback()"> <observes element="cangoback" attribute="disabled"/> </titledbutton> </window> but it is up to the application code to locate the broadcasters within a window so it can punch them when necessary.