HTML <iframe> referrerpolicy属性
例
リクエストとともにリファラー情報が送信されないことを指定します。
<iframe src="https://w3schools.com/" referrerpolicy="no-referrer"></iframe>
定義と使用法
このreferrerpolicy
属性は、iframeをフェッチするときに送信するリファラー情報を指定します。
ブラウザのサポート
表の数字は、属性を完全にサポートする最初のブラウザーバージョンを示しています。
Attribute | |||||
---|---|---|---|---|---|
referrerpolicy | 51.0 | 79.0 | 50.0 | 11.1 | 38.0 |
構文
<iframe
referrerpolicy="no-referrer|no-referrer-when-downgrade|origin|origin-when-cross-origin|same-origin|strict-origin-when-cross-origin|unsafe-url">
属性値
Value | Description |
---|---|
no-referrer | No referrer information will be sent along with a request |
no-referrer-when-downgrade | Default. The referrer header will not be sent to origins without HTTPS |
origin | Send only scheme, host, and port to the request client |
origin-when-cross-origin | For cross-origin requests: Send only scheme, host, and port. For same-origin requests: Also include the path |
same-origin | For same-origin requests: Referrer info will be sent. For cross-origin requests: No referrer info will be sent |
strict-origin | Only send referrer info if the security level is the same (e.g. HTTPS to HTTPS). Do not send to a less secure destination (e.g. HTTPS to HTTP) |
strict-origin-when-cross-origin | Send full path when performing a same-origin request. Send only origin when the security level stays the same (e.g. HTTPS to HTTPS). Send no header to a less secure destination (HTTPS to HTTP) |
unsafe-url | Send origin, path and query string (but not fragment, password, or username). This value is considered unsafe |
❮HTML<iframe>タグ