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---
title: window.navigator
slug: Web/API/Window/navigator
tags:
- API
- Window
- 只读属性
- 属性
translation_of: Web/API/Window/navigator
---
<div>{{ApiRef}}</div>
<p>只读属性 <strong><code>Window.navigator</code></strong> 会返回一个 {{domxref("Navigator")}} 对象的引用，可以用于请求运行当前代码的应用程序的相关信息。</p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox"><em>navigatorObject</em> = window.navigator</pre>
<h2 id="例子">例子</h2>
<h3 id="例子_1：检测浏览器并返回浏览器名称字符串">例子 #1：检测浏览器并返回浏览器名称字符串</h3>
<pre class="brush: js">var sBrowser, sUsrAg = navigator.userAgent;
// The order matters here, and this may report false positives for unlisted browsers.
if (sUsrAg.indexOf("Firefox") > -1) {
sBrowser = "Mozilla Firefox";
// "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0"
} else if (sUsrAg.indexOf("Opera") > -1 || sUsrAg.indexOf("OPR") > -1) {
sBrowser = "Opera";
//"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 OPR/57.0.3098.106"
} else if (sUsrAg.indexOf("Trident") > -1) {
sBrowser = "Microsoft Internet Explorer";
// "Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; Zoom 3.6.0; wbx 1.0.0; rv:11.0) like Gecko"
} else if (sUsrAg.indexOf("Edge") > -1) {
sBrowser = "Microsoft Edge";
// "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 Edge/16.16299"
} else if (sUsrAg.indexOf("Chrome") > -1) {
sBrowser = "Google Chrome or Chromium";
// "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/66.0.3359.181 Chrome/66.0.3359.181 Safari/537.36"
} else if (sUsrAg.indexOf("Safari") > -1) {
sBrowser = "Apple Safari";
// "Mozilla/5.0 (iPhone; CPU iPhone OS 11_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1 980x1306"
} else {
sBrowser = "unknown";
}
alert("当前浏览器为: " + sBrowser);
</pre>
<h3 id="例子_2：检测浏览器并返回代表当前浏览器的索引数字">例子 #2：检测浏览器并返回代表当前浏览器的索引数字</h3>
<pre class="brush: js">function getBrowserId () {
var aKeys = ["MSIE", "Firefox", "Safari", "Chrome", "Opera"],
sUsrAg = navigator.userAgent,
nIdx = aKeys.length - 1;
for (nIdx; nIdx > -1 && sUsrAg.indexOf(aKeys[nIdx]) === -1; nIdx--);
return nIdx;
}
console.log(getBrowserId());</pre>
<h2 id="规范">规范</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">规范</th>
<th scope="col">状态</th>
<th scope="col">备注</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{SpecName('HTML WHATWG', '#dom-navigator', 'Window: navigator')}}</td>
<td>{{Spec2('HTML WHATWG')}}</td>
<td> </td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<p>{{Compat("api.Window.navigator")}}</p>
<h2 id="参见">参见</h2>
<ul>
<li></li></ul>
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