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---
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 && 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>
<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>
Removed in 15.0<br>
Reintroduced in 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" 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>
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