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-Headers headers) can be cached.
Maximum number of seconds the results can be cached, as an unsigned non-negative integer. Firefox caps this at 24 hours (86400 seconds). Chromium (prior to v76) caps at 10 minutes (600 seconds). Chromium (starting in v76) caps at 2 hours (7200 seconds). The default value is 5 seconds.
Cache results of a preflight request for 10 minutes:
|Fetch Standard |
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