Contact emails
[email protected]<mailto:[email protected]>

Explainer
https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/ResourceTimingContentEncoding/Content_Encoding.md

Specification
Https://fetch.spec.whatwg.org/#request-body-header-name<https://fetch.spec.whatwg.org/#request-body-header-name>
https://www.w3.org/TR/resource-timing/#dom-performanceresourcetiming-contentencoding


Summary

This provides access to Content-Encoding values in ResourceTiming to enable 
developers to effectively experiment with new content encodings, monitor 
performance, and debug issues using Real User Monitoring (RUM).
More detailed discussion: https://github.com/w3c/resource-timing/issues/381

Blink component
Blink>PerformanceAPIs>ResourceTiming<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EPerformanceAPIs%3EResourceTiming%22>

Web Feature ID
resource-timing<https://webstatus.dev/features/resource-timing>

Search tags
contentEncoding<https://chromestatus.com/features#tags:contentEncoding>, 
resource-timing<https://chromestatus.com/features#tags:resource-timing>

TAG review
https://github.com/w3ctag/design-reviews/issues/1064

TAG review status
Resolution: satisfied

Risks
N/A

Interoperability and Compatibility
None

Gecko: No signal (https://github.com/mozilla/standards-positions/issues/1189)

WebKit: Support (https://github.com/WebKit/standards-positions/issues/467)

Web developers: No signals

Other signals:

WebView application risks
Does this intent deprecate or change behavior of existing APIs, such that it 
has potentially high risk for Android WebView-based applications?

No, this feature only adds a new property in resource timing.


Debuggability
None

Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, 
ChromeOS, Android, and Android WebView)?
Yes

Is this feature fully tested by 
web-platform-tests<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?
Yes: 
https://wpt.fyi/results/resource-timing/content-encoding.https.html?label=experimental&label=master&aligned

Flag name on about://flags
None

Finch feature name
ResourceTimingContentEncoding

Non-finch justification
None

Rollout plan
Will ship enabled for all users

Requires code in //chrome?
False

Tracking bug
https://issuetracker.google.com/issues/327941462

Availability expectation
Availability in other browsers are not expected soon, although webkit signaled 
support for this feature.

Adoption expectation
It's expected that some sites who uses complicated content encoding schemes 
would like to use this feature for optimization.

Non-OSS dependencies
Does the feature depend on any code or APIs outside the Chromium open source 
repository and its open-source dependencies to function?
No.

Estimated milestones
No milestones specified


Anticipated spec changes
Open questions about a feature may be a source of future web compat or interop 
issues. Please list open issues (e.g. links to known github issues in the 
project for the feature specification) whose resolution may introduce web 
compat/interop risk (e.g., changing to naming or structure of the API in a 
non-backward-compatible way).

Spec changes have already been merged to both "fetch" and "resource timing".  
Links to the spec are listed above in this document.

Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/4818080273006592?gate=5147198382407680

Links to previous Intent discussions
Intent to Prototype:
https://groups.google.com/a/chromium.org/g/blink-dev/c/fTt7dGZcQ80/m/9z9amofjBAAJ



This intent message was generated by Chrome Platform 
Status<https://chromestatus.com/>.

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