Document.evaluate() - Web APIs
syntax var xpathresult = document.evaluate( xpathexpression, contextnode, namespaceresolver, resulttype, result ); xpathexpression is a string representing the xpath to be evaluated.
...null is the most common and will create a new xpathresult example var headings = document.evaluate("/html/body//h2", document, null, xpathresult.any_type, null); /* search the document for all h2 elements.
...for example, if you know the content you are looking for is somewhere inside the body tag, you can use this: document.evaluate(".//h2", document.body, null, xpathresult.any_type, null); notice in the above document.body has been used as the context instead of document so the xpath starts from the body element.
...And 2 more matches

Introduction to using XPath in JavaScript - XPath
document.evaluate this method evaluates xpath expressions against an xml based document (including html documents), and returns a xpathresult object, which can be a single node or a set of nodes.
... the existing documentation for this method is located at document.evaluate, but it is rather sparse for our needs at the moment; a more comprehensive examination will be given below.
... var xpathresult = document.evaluate( xpathexpression, contextnode, namespaceresolver, resulttype, result ); parameters the evaluate function takes a total of five parameters: xpathexpression: a string containing the xpath expression to be evaluated.
...And 9 more matches

nsIDOMXPathResult
dom/interfaces/xpath/nsidomxpathresult.idlscriptable this interface describes an xpath result returned by nsidomxpathevaluator or document.evaluate inherits from: nsisupports last changed in gecko 1.7 method overview nsidomnode iteratenext(); nsidomnode snapshotitem(in unsigned long index); attributes attribute type description booleanvalue boolean if resulttype is boolean_type, the boolean value.
...see also introduction to using xpath in javascript document object model (dom) level 3 xpath specification nsidomxpathevaluator document.evaluate nsidomxpathexception ...

XPathResult.booleanValue - Web APIs
syntax var value = result.booleanvalue; return value the return value is the boolean value of the xpathresult returned by document.evaluate().
... html <div>xpath example</div> <p>text is 'xpath example': <output></output></p> javascript var xpath = "//div/text() = 'xpath example'"; var result = document.evaluate(xpath, document, null, xpathresult.boolean_type, null); document.queryselector("output").textcontent = result.booleanvalue; result specifications specification status comment document object model (dom) level 3 xpath specificationthe definition of 'xpathresult.booleanvalue' in that specification.

XPathResult.numberValue - Web APIs
syntax var value = result.numbervalue; return value the return value is the numeric value of the xpathresult returned by document.evaluate().
... html <div>xpath example</div> <div>number of &lt;div&gt;s: <output></output></div> javascript var xpath = "count(//div)"; var result = document.evaluate(xpath, document, null, xpathresult.number_type, null); document.queryselector("output").textcontent = result.numbervalue; result specifications specification status comment document object model (dom) level 3 xpath specificationthe definition of 'xpathresult.numbervalue' in that specification.

XPathResult.singleNodeValue - Web APIs
syntax var value = result.singlenodevalue; return value the return value is the node value of the xpathresult returned by document.evaluate().
... html <div>xpath example</div> <div>tag name of the element having the text content 'xpath example': <output></output></div> javascript var xpath = "//*[text()='xpath example']"; var result = document.evaluate(xpath, document, null, xpathresult.first_ordered_node_type, null); document.queryselector("output").textcontent = result.singlenodevalue.localname; result specifications specification status comment document object model (dom) level 3 xpath specificationthe definition of 'xpathresult.singlenodevalue' in that specification.

XPathResult.stringValue - Web APIs
syntax var value = result.stringvalue; return value the return value is the string value of the xpathresult returned by document.evaluate().
... html <div>xpath example</div> <div>text content of the &lt;div&gt; above: <output></output></div> javascript var xpath = "//div/text()"; var result = document.evaluate(xpath, document, null, xpathresult.string_type, null); document.queryselector("output").textcontent = result.stringvalue; result specifications specification status comment document object model (dom) level 3 xpath specificationthe definition of 'xpathresult.stringvalue' in that specification.

XPath - Archive of obsolete content
notes and sample code for xpath and ajax (the following was moved from document.evaluate) obj.evaluate(xpathexpression,contextnode,namespaceresolver,resulttype,result); //obj and contextnode should be the same object, if context is a ajax xml object (example: returnedxml) this should be used as : returnedxml.evaluate(xpathexpression,returnedxml,namespaceresolver,returntype,result); //contextnode should be used in the one in which it was created //add by mooring 2008-11-15 16:00 china var xhr = new ajax('post','demo.xml',parsexml,'xml'); //ajax is a class written by javascript which return responsexml object to parsexml function function parsexml(obj)//obj is the returnxml object now { if(!obj.documentelement) { alert("your browser does't support this script!"); return; } var fi...

jspage - Archive of obsolete content
c)){case"object":b={};for(var e in c){b[e]=$unlink(c[e]); }break;case"hash":b=new hash(c);break;case"array":b=[];for(var d=0,a=c.length;d<a;d++){b[d]=$unlink(c[d]);}break;default:return c;}return b;}var browser=$merge({engine:{name:"unknown",version:0},platform:{name:(window.orientation!=undefined)?"ipod":(navigator.platform.match(/mac|win|linux/i)||["other"])[0].tolowercase()},features:{xpath:!!(document.evaluate),air:!!(window.runtime),query:!!(document.queryselector)},plugins:{},engines:{presto:function(){return(!window.opera)?false:((arguments.callee.caller)?960:((document.getelementsbyclassname)?950:925)); },trident:function(){return(!window.activexobject)?false:((window.xmlhttprequest)?((document.queryselectorall)?6:5):4);},webkit:function(){return(navigator.taintenabled)?false:((browser.features.xpa...

nsIDOMXPathEvaluator
see also introduction to using xpath in javascript document.evaluate dom level 3 xpath specification xml path language (xpath)rec nsidomxpathresult nsidomxpathexception ...

nsIDOMXPathException
see also introduction to using xpath in javascript document object model (dom) level 3 xpath specification nsidomxpathevaluator document.evaluate nsidomxpathresult ...

nsIDOMXPathExpression
see also introduction to using xpath in javascript nsidomxpathevaluator document.evaluate document object model (dom) level 3 xpath specification nsidomxpathresult ...

Attr - Web APIs
as that doesn't hold true in cases like attr objects being returned by document.evaluate, the dom living standard reintroduced the property.

Document.createNSResolver() - Web APIs
see also document.evaluate introduction to using xpath in javascript specifications specification status comment document object model (dom) level 3 xpath specificationthe definition of 'document.creatensresolver' in that specification.

Document - Web APIs
document.evaluate() evaluates an xpath expression.