Pragma

A legacy HTTP/1.0 compatibility field, mainly used with the no-cache directive.

Prefer Cache-Control for modern cache policy. Keep Pragma only when a legacy client requires it and understand that it is deprecated in the IANA registry.

httpheadercachedeprecated

Reference (http)

Pragma: no-cache

Prefer Cache-Control for modern cache policy. Keep Pragma only when a legacy client requires it and understand that it is deprecated in the IANA registry.

Common mistakes

Using Pragma as the only modern way to prevent sensitive response storage.

IANA registry: http-fields/field-names

Registry reference: RFC 9111, Section 5.4: HTTP Caching

Sources

MDN HTTP Reference
IANA HTTP Field Name Registry