Pragma HTTP/1.0 general header is an implementation-specific header that may have various effects along the request-response chain. It is used for backwards compatibility with HTTP/1.0 caches where the
Cache-Control HTTP/1.1 header is not yet present.
Pragma is not specified for HTTP responses and is therefore not a reliable replacement for the general HTTP/1.1
Cache-Control header, although it does behave the same as
Cache-Control: no-cache, if the
Cache-Control header field is omitted in a request. Use
Pragma only for backwards compatibility with HTTP/1.0 clients.
|Header type||General header, but response behavior is not specified and thus implementation-specific.|
|Forbidden header name||no|
Cache-Control: no-cache. Forces caches to submit the request to the origin server for validation before releasing a cached copy.
|RFC 7234, section 5.4: Pragma||Hypertext Transfer Protocol (HTTP/1.1): Caching|
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
|Basic support||Chrome Full support Yes||Edge Full support Yes||Firefox Full support Yes||IE Full support Yes||Opera Full support Yes||Safari Full support Yes||WebView Android Full support Yes||Chrome Android Full support Yes||Edge Mobile Full support Yes||Firefox Android Full support Yes||Opera Android Full support Yes||Safari iOS Full support Yes||Samsung Internet Android Full support Yes|
- Full support
- Full support