---
title: PositionOptions.enableHighAccuracy
slug: Web/API/PositionOptions/enableHighAccuracy
translation_of: Web/API/PositionOptions/enableHighAccuracy
---
<div>{{APIRef("Geolocation API")}}</div>

<p><code><strong>PositionOptions.enableHighAccuracy</strong></code> 是一個 {{domxref("Boolean")}} 的值。此值指出方法是否需要回傳最佳的結果。如果值為真且該裝置是具備提供精準位置的能力，則方法會回傳最佳結果。必須注意的是最佳結果會導致較長的回應時間或者需要更多的電力耗損 (舉例來說擁有GPS晶片的手機)。相反來說，如果值為偽，<code>機器會因為回應時間較短以及消耗較少的電力達到資源節省</code>。預設值：偽。</p>

<h2 id="語法">語法</h2>

<pre class="syntaxbox"><var>positionOptions</var>.enableHighAccuracy = <var>booleanValue</var>
</pre>

<h2 id="規格">規格</h2>

<table class="standard-table">
 <thead>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td>{{SpecName('Geolocation', '#enablehighaccuracy', 'PositionOptions.enableHighAccuracy')}}</td>
   <td>{{Spec2('Geolocation')}}</td>
   <td>Initial definition</td>
  </tr>
 </tbody>
</table>

<h2 id="瀏覽器的相容性">瀏覽器的相容性</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>5</td>
   <td>{{CompatGeckoDesktop("1.9.1")}}</td>
   <td>9</td>
   <td>10.60<br>
    {{CompatNo}} 15.0<br>
    16.0</td>
   <td>5</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>{{CompatUnknown}}</td>
   <td>{{CompatGeckoMobile("4")}}</td>
   <td>{{CompatUnknown}}</td>
   <td>10.60</td>
   <td>{{CompatUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<h2 id="請參考">請參考</h2>

<ul>
 <li><a href="/en-US/docs/WebAPI/Using_geolocation">Using geolocation</a></li>
 <li>屬於{{domxref("PositionOptions")}} 。</li>
</ul>