Attributo della politica di riferimento HTML <iframe>
Esempio
Specifica che non verranno inviate informazioni sul referrer insieme alla richiesta:
<iframe src="https://w3schools.com/" referrerpolicy="no-referrer"></iframe>
Definizione e utilizzo
L' referrerpolicyattributo specifica quali informazioni sul referrer inviare durante il recupero di un iframe.
Supporto browser
I numeri nella tabella specificano la prima versione del browser che supporta completamente l'attributo.
| Attribute | |||||
|---|---|---|---|---|---|
| referrerpolicy | 51.0 | 79.0 | 50.0 | 11.1 | 38.0 |
Sintassi
<iframe
referrerpolicy="no-referrer|no-referrer-when-downgrade|origin|origin-when-cross-origin|same-origin|strict-origin-when-cross-origin|unsafe-url">
Valori di attributo
| 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 |
❮ Tag HTML <iframe>