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HTML <a> referrerpolicy 属性

❮ HTML <a> 标签

示例

设置链接的 referrerpolicy

<a href="https://w3schools.org.cn" referrerpolicy="origin">

定义和用法

The referrerpolicy 属性指定当用户单击超链接时要发送哪些推荐者信息。


浏览器支持

表中的数字指定完全支持该属性的第一个浏览器版本。

属性
referrerpolicy 51.0 79.0 50.0 11.1 38.0

语法

<a referrerpolicy="no-referrer|no-referrer-when-downgrade|origin|origin-when-cross-origin|same-origin|strict-origin-when-cross-origin|unsafe-url">

属性值

描述
no-referrer 不发送推荐者信息
no-referrer-when-downgrade 默认值。如果协议安全级别保持不变或更高(HTTP 到 HTTP、HTTPS 到 HTTPS、HTTP 到 HTTPS 正常),则发送来源、路径和查询字符串。发送到安全级别较低时什么也不发送(HTTPS 到 HTTP 不正常)
origin 发送文档的来源(方案、主机和端口)
origin-when-cross-origin 对于跨域请求,发送文档的来源。对于同源请求,发送来源、路径和查询字符串
same-origin 对于同源请求,发送推荐者。对于跨域请求,不发送推荐者
strict-origin-when-cross-origin 如果协议安全级别保持不变或更高(HTTP 到 HTTP、HTTPS 到 HTTPS 以及 HTTP 到 HTTPS 正常),则发送来源。发送到安全级别较低时什么也不发送(HTTPS 到 HTTP)
unsafe-url 发送来源、路径和查询字符串(无论安全与否)。谨慎使用此值!

❮ HTML <a> 标签
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