server-configs-nginx/h5bp/cross-origin/resource_timing.conf

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Nginx Configuration File
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# ----------------------------------------------------------------------
# | Cross-origin resource timing |
# ----------------------------------------------------------------------
# Allow cross-origin access to the timing information for all resources.
#
# If a resource isn't served with a `Timing-Allow-Origin` header that
# would allow its timing information to be shared with the document,
# some of the attributes of the `PerformanceResourceTiming` object will
# be set to zero.
#
# https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Timing-Allow-Origin
# https://www.w3.org/TR/resource-timing/
# https://www.stevesouders.com/blog/2014/08/21/resource-timing-practical-tips/
add_header Timing-Allow-Origin "*";