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<td >Qt 5.9</td><td ><a href="qtqml-index.html">Qt QML</a></td><td >QML Global Object</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#xmlhttprequest">XMLHttpRequest</a></li>
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<h1 class="title">QML Global Object</h1>
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<p>The QML JavaScript host environment implements the following host objects and functions. These are built in and can be used from any JavaScript code loaded in QML, without additional imports:</p>
<ul>
<li>The <a href="qml-qtqml-qt.html">Qt object</a>: This object is specific to QML, and provides helper methods and properties specific to the QML environment.</li>
<li>qsTr(), qsTranslate(), qsTrId(), QT_TR_NOOP(), QT_TRANSLATE_NOOP(), and QT_TRID_NOOP() functions: These functions are specific to QML, and provide translation capabilities to the QML environment.</li>
<li>gc() function: This function is specific to QML, and provides a way to manually trigger garbage collection.</li>
<li>print() function: This function is specific to QML, and provides a simple way to output information to the console.</li>
<li>The console object: This object implements a subset of the <a href="http://getfirebug.com/wiki/index.php/Console_API">FireBug Console API</a>.</li>
<li><a href="qtqml-javascript-qmlglobalobject.html#xmlhttprequest">XMLHttpRequest</a>, DOMException: These objects implement a subset of the <a href="http://www.w3.org/TR/XMLHttpRequest/">W3C XMLHttpRequest specification</a>.</li>
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<p><b>Note: </b>The <a href="qjsengine.html#globalObject">globalObject()</a> function cannot be used to modify the global object of a <a href="qqmlengine.html">QQmlEngine</a>. For more information about this, see <a href="qtqml-javascript-hostenvironment.html#javascript-environment-restrictions">JavaScript Environment Restrictions</a>.</p><a name="xmlhttprequest"></a><a name="xmlhttprequest"></a>
<h2 id="xmlhttprequest">XMLHttpRequest</h2>
<p>The <a href="qtqml-javascript-qmlglobalobject.html#xmlhttprequest">XMLHttpRequest</a> object, which can be used to asynchronously obtain data from over a network.</p>
<p>The <a href="qtqml-javascript-qmlglobalobject.html#xmlhttprequest">XMLHttpRequest</a> API implements the same <a href="http://www.w3.org/TR/XMLHttpRequest/">W3C standard</a> as many popular web browsers with following exceptions:</p>
<ul>
<li>QML's <a href="qtqml-javascript-qmlglobalobject.html#xmlhttprequest">XMLHttpRequest</a> does not enforce the same origin policy.</li>
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<p>Additionally, the <code>responseXML</code> XML DOM tree currently supported by QML is a reduced subset of the <a href="http://www.w3.org/TR/DOM-Level-3-Core/">DOM Level 3 Core</a> API supported in a web browser. The following objects and properties are supported by the QML implementation:</p>
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<thead><tr class="qt-style"><th ><b>Node</b></th><th ><b>Document</b></th><th ><b>Element</b></th><th ><b>Attr</b></th><th ><b>CharacterData</b></th><th ><b>Text</b></th></tr></thead>
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<li>nodeName</li>
<li>nodeValue</li>
<li>nodeType</li>
<li>parentNode</li>
<li>childNodes</li>
<li>firstChild</li>
<li>lastChild</li>
<li>previousSibling</li>
<li>nextSibling</li>
<li>attributes</li>
</ul>
</td><td ><ul>
<li>xmlVersion</li>
<li>xmlEncoding</li>
<li>xmlStandalone</li>
<li>documentElement</li>
</ul>
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<li>tagName</li>
</ul>
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<li>name</li>
<li>value</li>
<li>ownerElement</li>
</ul>
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<li>data</li>
<li>length</li>
</ul>
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<li>isElementContentWhitespace</li>
<li>wholeText</li>
</ul>
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<p>The <a href="qtqml-xmlhttprequest-example.html">XMLHttpRequest example</a> demonstrates how to use the <a href="qtqml-javascript-qmlglobalobject.html#xmlhttprequest">XMLHttpRequest</a> object to make a request and read the response headers.</p>
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<acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd.
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