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HTML <meta> http-equiv 属性

❮ HTML <meta> 标签

示例

每 30 秒刷新一次文档

<head>
  <meta http-equiv="refresh" content="30">
</head>
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定义和用法

http-equiv 属性为 content 属性的信息/值提供 HTTP 标头。

http-equiv 属性可用于模拟 HTTP 响应标头。


浏览器支持

属性
http-equiv

语法

<meta http-equiv="content-security-policy|content-type|default-style|refresh">

属性值

描述
content-security-policy 指定文档的内容策略。

示例

<meta http-equiv="content-security-policy" content="default-src 'self'">

content-type 指定文档的字符编码。

示例

<meta http-equiv="content-type" content="text/html; charset=UTF-8">

default-style 指定要使用的首选样式表。

示例

<meta http-equiv="default-style" content="the document's preferred stylesheet">

注意: 上面内容属性的值必须与同一文档中链接元素的标题属性的值匹配,或者必须与同一文档中样式元素的标题属性的值匹配。

refresh 定义文档刷新自身的间隔时间。

示例

<meta http-equiv="refresh" content="300">

注意:应谨慎使用“refresh”值,因为它会将页面的控制权从用户手中夺走。 使用“refresh”会导致 W3C 的 Web 内容无障碍指南 失败。


❮ HTML <meta> 标签
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