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<td ><a href="index.html">Qt 5.9</a></td><td >Scripting</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.5 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#qt-script-module">Qt Script Module</a></li>
<li class="level1"><a href="#js-api">JS API</a></li>
<li class="level1"><a href="#qml">QML</a></li>
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<h1 class="title">Scripting</h1>
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<p>Qt has three main ways to help make an application scriptable. All of them allow easy integration of the <a href="../qtscript/ecmascript.html">ECMAScript</a> (more widely known as JavaScript) language into the application. Depending on how deep the integration should be, one of these APIs can be used:</p>
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<h2 id="qt-script-module">Qt Script Module</h2>
<p><a href="../qtscript/qtscript-index.html">Qt Script</a> is a separate module, designed with scripting applications in mind. It has a mature and rich API that permits a really deep integration of scripting functionality. It allows evaluating and debugging of scripts, and advanced use of objects and functions. It also gives access to a really low level <a href="../qtscript/ecmascript.html">ECMAScript</a> engine API. Full documentation about using <a href="../qtscript/qtscript-index.html">Qt Script</a> to make an application scriptable can be found <a href="../qtqml/qtjavascript.html">here</a>.</p>
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<h2 id="js-api">JS API</h2>
<p>This is a simple API, very similar to <a href="../qtscript/qtscript-index.html">Qt Script</a>, but limited to basic functionality. The main classes are <a href="../qtqml/qjsengine.html">QJSEngine</a> and <a href="../qtqml/qjsvalue.html">QJSValue</a>, which can be used to embed pure <a href="../qtscript/ecmascript.html">ECMAScript</a> functionality like evaluating scripts and calling functions.</p>
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<h2 id="qml">QML</h2>
<p><a href="../qtqml/qtqml-index.html">QML</a> exposes a modified <a href="../qtscript/ecmascript.html">ECMAScript</a> environment. It is designed to mix well with the JavaScript API mentioned earlier. QML may be used without <a href="../qtquick/qtquick-index.html">Qt Quick</a> components, which may be useful for server side scripting. With QML it is possible to mix pure <a href="../qtscript/ecmascript.html">ECMAScript</a> and declarative components (<a href="qtquick-usecase-integratingjs.html">Use Case - Integrating JavaScript in QML</a>).</p>
<p>All of these three scripting solutions seamlessly inter-operate with <a href="../qtcore/metaobjects.html">the Meta-Object System</a>, which means that all <a href="../qtcore/signalsandslots.html">signals and slots</a> and <a href="../qtcore/properties.html">properties</a> of a <a href="../qtcore/qobject.html">QObject</a> instance are accessible in an <a href="../qtscript/ecmascript.html">ECMAScript</a> environment.</p>
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