--- title: InputEvent.isComposing slug: Web/API/InputEvent/isComposing translation_of: Web/API/InputEvent/isComposing --- <p>{{APIRef("DOM Events")}}</p> <p>The <code><strong>InputEvent.isComposing</strong></code> read-only property returns a {{jsxref("Boolean")}} value indicating if the event is fired after {{event("compositionstart")}} and before {{event("compositionend")}}.</p> <h2 id="这是一个只读属性,返回boolean类型。表示正处于输入事件的开始与结束之间,表示正在输入状态。">这是一个只读属性,返回boolean类型。表示正处于输入事件的开始与结束之间,表示正在输入状态。</h2> <h2 id="Syntax">Syntax</h2> <pre class="syntaxbox">var <em>bool</em> = <em>event</em>.isComposing;</pre> <h2 id="Example">Example</h2> <pre class="brush: js">var inputEvent = new InputEvent("syntheticInput", false); console.log(inputEvent.isComposing); // return false </pre> <h2 id="Specifications" name="Specifications">Specifications</h2> <table class="standard-table" style="height: 49px; width: 1000px;"> <thead> <tr> <th scope="col">Specification</th> <th scope="col">Status</th> <th scope="col">Comment</th> </tr> </thead> <tbody> <tr> <td>{{SpecName('DOM3 Events','#widl-InputEvent-isComposing','InputEvent.isComposing')}}</td> <td>{{Spec2('DOM3 Events')}}</td> <td>Initial definition.</td> </tr> </tbody> </table> <h2 id="Browser_compatibility">Browser compatibility</h2> <p>{{ CompatibilityTable() }}</p> <div id="compat-desktop"> <table class="compat-table"> <tbody> <tr> <th>Feature</th> <th>Chrome</th> <th>Firefox (Gecko)</th> <th>Internet Explorer</th> <th>Opera</th> <th>Safari (WebKit)</th> </tr> <tr> <td>Basic support</td> <td>{{ CompatNo() }}</td> <td>{{ CompatGeckoDesktop("31.0") }}</td> <td>{{ CompatNo() }}</td> <td>{{ CompatNo() }}</td> <td>{{ CompatNo() }}</td> </tr> </tbody> </table> </div> <div id="compat-mobile"> <table class="compat-table"> <tbody> <tr> <th>Feature</th> <th>Android</th> <th>Firefox Mobile (Gecko)</th> <th>IE Phone</th> <th>Opera Mobile</th> <th>Safari Mobile</th> </tr> <tr> <td>Basic support</td> <td>{{ CompatNo() }}</td> <td>{{ CompatGeckoMobile("31.0") }}</td> <td>{{ CompatNo() }}</td> <td>{{ CompatNo() }}</td> <td>{{ CompatNo() }}</td> </tr> </tbody> </table> </div> <h2 class="note" id="See_also">See also</h2> <ul> <li>{{ event("compositionstart") }} and {{ event("compositionend")}}</li> <li>{{domxref("InputEvent")}}</li> </ul>