Window navigator.userAgent property

Definition and usage

userAgent The property returns the user-agent header that the browser sends to the server.

userAgent The property is read-only.

The returned value contains information about the browser name, version, and platform.

The Web standard recommends that browsers provide as little header information as possible. Never assume that this property will remain unchanged in future browsers.

Example

Example 1

Get navigator.userAgent:

let agent = navigator.userAgent;

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Example 2

Display all navigator properties:

let text = "<p>Browser CodeName: " + navigator.appCodeName + "</p>" +
"<p>Browser Name: " + navigator.appName + "</p>" +
"<p>Browser Version: " + navigator.appVersion + "</p>" +
"<p>Cookies Enabled: " + navigator.cookieEnabled + "</p>" +
"<p>Browser Language: " + navigator.language + "</p>" +
"<p>Browser Online: " + navigator.onLine + "</p>" +
"<p>Platform: " + navigator.platform + "</p>" +
"<p>User-agent header: " + navigator.userAgent + "</p>";

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ວິທະຍານ

navigator.userAgent

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所有浏览器都支持 navigator.userAgent：

Chrome IE Edge Firefox Safari Opera
Chrome IE Edge Firefox Safari Opera
支持 支持 支持 支持 支持 支持