Attributo della politica di riferimento HTML <script>
Esempio
Imposta la policy di riferimento per uno script:
<script src="myscripts.js" referrerpolicy="origin"></script>
Definizione e utilizzo
L' referrerpolicyattributo specifica quali informazioni sul referrer inviare durante il recupero di uno script.
Supporto del browser
I numeri nella tabella specificano la prima versione del browser che supporta completamente l'attributo.
| Attribute | |||||
|---|---|---|---|---|---|
| referrerpolicy | 70.0 | 79.0 | 65.0 | No | Yes |
Sintassi
<script 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 is sent |
| no-referrer-when-downgrade | Default. Sends the origin, path, and query string if the protocol security level stays the same or is higher (HTTP to HTTP, HTTPS to HTTPS, HTTP to HTTPS is ok). Sends nothing to less secure level (HTTPS to HTTP is not ok) |
| origin | Sends the origin (scheme, host, and port) of the document |
| origin-when-cross-origin | Sends the origin of the document for cross-origin request. Sends the origin, path, and query string for same-origin request |
| same-origin | Sends a referrer for same-origin request. Sends no referrer for cross-origin request |
| strict-origin-when-cross-origin | Sends the origin if the protocol security level stays the same or is higher (HTTP to HTTP, HTTPS to HTTPS, and HTTP to HTTPS is ok). Sends nothing to less secure level (HTTPS to HTTP) |
| unsafe-url | Sends the origin, path, and query string (regardless of security). Use this value carefully! |
❮ Tag HTML <a>