Document.title | Web API

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句法
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document.title property gets or sets the current title of the document.

句法

var docTitle = document.title;

docTitle is a string containing the document 's title. If the title was overridden by setting document.title , it contains that value. Otherwise, it contains the title specified in the markup (see the 注意事项 below).

document.title = newTitle;

newTitle is the new title of the document. The assignment affects the return value of document.title , the title displayed for the document (e.g. in the titlebar of the window or tab), and it also affects the DOM of the document (e.g. the content of the <title> element in an HTML document).

范例

<!DOCTYPE html>
<html>
<head>
  <title>Hello World!</title>
</head>
<body>
  <script>
    alert(document.title); // displays "Hello World!"
    document.title = "Goodbye World!";
    alert(document.title); // displays "Goodbye World!"
  </script>
</body>
</html>

注意事项

This property applies to HTML, SVG, XUL, and other documents in Gecko.

For HTML documents the initial value of document.title is the text content of the <title> element. For XUL it's the value of the title 属性在 <xul:window> or other top-level XUL element.

In XUL, accessing document.title before the document is fully loaded has undefined behavior: document.title may return an empty string and setting document.title may have no effect.

规范

规范	状态	注释
HTML 实时标准 The definition of 'document.title' in that specification.	实时标准

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`title`	Chrome 1	Edge 12	Firefox Yes	IE Yes	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

图例

完整支持

元数据

最后修改： Jul 13, 2020

在此页

句法

范例

注意事项

规范

浏览器兼容性

图例

相关话题