files/zh-cn/web/api/navigator/maxtouchpoints/index.html


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---
title: Navigator.maxTouchPoints
slug: Web/API/Navigator/maxTouchPoints
translation_of: Web/API/Navigator/maxTouchPoints
---
<div>{{apiref("HTML DOM")}}</div>

<div>返回当前设备能够支持的最大同时触摸的点数。</div>

<div> </div>

<h2 id="语法">语法</h2>

<pre class="syntaxbox"><em>touchPoints</em> = <em>navigator</em>.maxTouchPoints;
</pre>

<h2 id="样例">样例</h2>

<pre class="brush: js">if (navigator.maxTouchPoints &gt; 1) {
  // 浏览器支持多点触控
}
</pre>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
  <tr>
   <td>{{SpecName('Pointer Events 2','#extensions-to-the-navigator-interface', 'maxTouchPoints')}}</td>
   <td>{{Spec2('Pointer Events 2')}}</td>
   <td>Non-stable version.</td>
  </tr>
  <tr>
   <td>{{SpecName('Pointer Events', '#extensions-to-the-navigator-interface', 'maxTouchPoints')}}</td>
   <td>{{Spec2('Pointer Events')}}</td>
   <td>Initial definition.</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</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</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatChrome("35")}}<sup>[1]</sup></td>
   <td>{{CompatGeckoDesktop("29")}}<sup>[2]</sup></td>
   <td>10 {{property_prefix("-ms")}}<br>
    11</td>
   <td>{{CompatUnknown}}</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>Chrome for Android</th>
   <th>Firefox Mobile (Gecko)</th>
   <th>IE Mobile</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatChrome("35")}}<sup>[1]</sup></td>
   <td>{{CompatGeckoMobile("29")}}<sup>[2]</sup></td>
   <td>10 {{property_prefix("-ms")}}<br>
    11</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatNo}}</td>
  </tr>
 </tbody>
</table>
</div>

<p>[1] This was implemented in <a href="http://crbug.com/248918">bug 248918</a>.</p>

<p>[2] Gecko supports this feature behind the preference <code>dom.w3c_pointer_events.enabled</code>, defaulting to <code>false</code>.</p>