Timing-Allow-Origin response header specifies origins that are allowed to see values of attributes retrieved via features of the Resource Timing API, which would otherwise be reported as zero due to cross-origin restrictions.
Timing-Allow-Origin: * Timing-Allow-Origin: <origin>[, <origin>]*
To allow any resource to see timing resources:
https://developer.mozilla.org to see timing resources, you can specify:
|Resource Timing Level 3 |
The definition of 'Timing-Allow-Origin' in that specification.
|Editor's Draft||Initial definition.|
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