---
title: Geolocation.clearWatch()
slug: Web/API/Geolocation/clearWatch
translation_of: Web/API/Geolocation/clearWatch
---
<p>{{ APIref("Geolocation API") }}</p>

<p><strong><code>Geolocation.clearWatch()</code></strong> 這個函式是用來取消   {{domxref("Geolocation.watchPosition()")}} 註冊的函式。</p>

<h2 id="語法">語法</h2>

<pre class="syntaxbox">navigator.geolocation.clearWatch(<em>id</em>);</pre>

<h3 id="參數">參數</h3>

<dl>
 <dt><em>編號(id)</em></dt>
 <dd>這個編號(ID) 是由 {{domxref("Geolocation.watchPosition()")}} 這個函式所回傳，當你不再需要收到位置更新時，你可以用此編號，取消 {{domxref("Geolocation.watchPosition()")}} 的註冊。</dd>
</dl>

<h2 id="範例">範例</h2>

<pre class="brush: js">var id, target, option;

function success(pos) {
  var crd = pos.coords;

  if (target.latitude === crd.latitude &amp;&amp; target.longitude === crd.longitude) {
    console.log('Congratulation, you reach the target');
    navigator.geolocation.clearWatch(id);
  }
};

function error(err) {
  console.warn('ERROR(' + err.code + '): ' + err.message);
};

target = {
  latitude : 0,
  longitude: 0,
}

options = {
  enableHighAccuracy: false,
  timeout: 5000,
  maximumAge: 0
};

id = navigator.geolocation.watchPosition(success, error, options);
</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')}}</td>
   <td>{{Spec2('Geolocation')}}</td>
   <td>Initial specification.</td>
  </tr>
 </tbody>
</table>

<h2 id="瀏覽器的相容性">瀏覽器的相容性</h2>

{{Compat("api.Geolocation.clearWatch")}}

<h2 id="請參考">請參考</h2>

<ul>
 <li><a href="/en-US/docs/WebAPI/Using_geolocation" title="/en-US/docs/WebAPI/Using_geolocation">Using geolocation</a></li>
 <li>{{domxref("Geolocation")}}</li>
 <li>{{domxref("Geolocation.watchPosition()")}}</li>
 <li>{{domxref("Geolocation.getCurrentPosition()")}}</li>
</ul>