Nossos voluntários ainda não traduziram este artigo para o Português (do Brasil). Junte-se a nós e ajude-nos a fazer o trabalho!
Você também pode ler o artigo em English (US).
The Access-Control-Max-Age response header indicates how long the results of a preflight request (that is the information contained in the Access-Control-Allow-Methods and Access-Control-Allow-Headers headers) can be cached.
| Header type | Response header |
|---|---|
| Forbidden header name | no |
Syntax
Access-Control-Max-Age: <delta-seconds>
Directives
- <delta-seconds>
- Maximum number of seconds the results can be cached.
Firefox caps this at 24 hours (86400 seconds) and Chromium at 10 minutes (600 seconds). Chromium also specifies a default value of 5 seconds.
A value of -1 will disable caching, requiring a preflight OPTIONS check for all calls.
Examples
Cache results of a preflight request for 10 minutes:
Access-Control-Max-Age: 600
Specifications
| Specification | Status | Comment |
|---|---|---|
| Fetch The definition of 'Access-Control-Max-Age' in that specification. |
Living Standard | Initial definition. |
Browser compatibility
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.
Update compatibility data on GitHub
| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic support | Chrome Full support 4 | Edge Full support 12 | Firefox Full support 3.5 | IE Full support 10 | Opera Full support 12 | Safari Full support 4 | WebView Android Full support 2 | Chrome Android Full support Yes | Edge Mobile Full support Yes | Firefox Android Full support 4 | Opera Android Full support 12 | Safari iOS Full support 3.2 | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support