window.navigator 对象包含有关访问者浏览器的信息。
Window Navigator
window.navigator 对象在编写时可不使用 window 这个前缀。
Navigator Object Properties
| Property | Description |
|---|---|
| appCodeName | Returns the code name of the browser |
| appName | Returns the name of the browser |
| appVersion | Returns the version information of the browser |
| cookieEnabled | Determines whether cookies are enabled in the browser |
| language | Returns the language of the browser |
| onLine | Determines whether the browser is online |
| platform | Returns for which platform the browser is compiled |
| product | Returns the engine name of the browser |
| userAgent | Returns the user-agent header sent by the browser to the server |
Navigator Object Methods
| Method | Description |
|---|---|
| javaEnabled() | Specifies whether or not the browser has Java enabled |
| taintEnabled() | Removed in JavaScript version 1.2. Specifies whether the browser has data tainting enabled |
实例:
<html> <body> <div id="example"></div> <script> txt = "<p>Browser CodeName: " + navigator.appCodeName + "</p>"; txt+= "<p>Browser Name: " + navigator.appName + "</p>"; txt+= "<p>Browser Version: " + navigator.appVersion + "</p>"; txt+= "<p>Cookies Enabled: " + navigator.cookieEnabled + "</p>"; txt+= "<p>Platform: " + navigator.platform + "</p>"; txt+= "<p>User-agent header: " + navigator.userAgent + "</p>"; txt+= "<p>User-agent language: " + navigator.systemLanguage + "</p>"; document.getElementById("example").innerHTML=txt; </script> </body> </html>
警告：来自 navigator 对象的信息具有误导性，不应该被用于检测浏览器版本，这是因为：
- navigator 数据可被浏览器使用者更改
- 浏览器无法报告晚于浏览器发布的新操作系统
浏览器检测
由于 navigator 可误导浏览器检测，使用对象检测可用来嗅探不同的浏览器。
由于不同的浏览器支持不同的对象，您可以使用对象来检测浏览器。例如，由于只有 Opera 支持属性 "window.opera"，您可以据此识别出 Opera。
例子：if (window.opera) {...some action...}