Attributo HTML <meta> http-equiv
Esempio
Aggiorna documento ogni 30 secondi:
<head>
<meta http-equiv="refresh" content="30">
</head>
Definizione e utilizzo
L' http-equivattributo fornisce un'intestazione HTTP per le informazioni/il valore contentdell'attributo.
L' http-equivattributo può essere utilizzato per simulare un'intestazione di risposta HTTP.
Supporto browser
| Attribute | |||||
|---|---|---|---|---|---|
| http-equiv | Yes | Yes | Yes | Yes | Yes |
Sintassi
<meta http-equiv="content-security-policy|content-type|default-style|refresh">
Valori di attributo
| Value | Description |
|---|---|
| content-security-policy | Specifies a content policy for the document. Example: <meta http-equiv="content-security-policy" content="default-src 'self'"> |
| content-type | Specifies the character encoding for the document. Example: <meta http-equiv="content-type" content="text/html; charset=UTF-8"> |
| default-style | Specified the preferred style sheet to use. Example: <meta http-equiv="default-style" content="the document's preferred stylesheet"> Note: The value of the content attribute above must match the value of the title attribute on a link element in the same document, or it must match the value of the title attribute on a style element in the same document. |
| refresh | Defines a time interval for the document to refresh itself.
Example: <meta http-equiv="refresh" content="300"> Note: The value "refresh" should be used carefully, as it takes the control of a page away from the user. Using "refresh" will cause a failure in W3C's Web Content Accessibility Guidelines. |
❮ Tag HTML <meta>