Comments (2)
Hi @Mattstir , we're not looking to add this functionality to this library at this time for the reasons explained here: #433 (comment)
However, while we appreciate the potential usefulness of this change to allow SPAs to manually measure CLS and INP per route, we do have some concerns with accepting this into the web-vitals library:
First up, the intent of the library (as given in the Overview) is for:
measuring all the Web Vitals metrics on real users, in a way that accurately matches how they're measured by Chrome and reported to other Google tools (e.g. Chrome User Experience Report, Page Speed Insights, Search Console's Speed Report).
By reseting CLS and INP you will affect the overall "hard-nav" CLS and INP that can be reported.
This is also part of why the soft branch support has not been merged either.
Secondly, the "measuring all the Web Vitals metrics" is a key point. By only making CLS and INP available (which I agree is all that CAN be made available given Chrome itself will not reset LCP or FCP), we think this will lead to confusion, or a certain expectation that they will be available.
But let's leave this issue open so others can comment.
FYI: @spetroll
from web-vitals.
Hi @tunetheweb
Thanks for the quick answer.
And despite that's not what I was hopping for I fully understand that reasoning.
PS: Thanks for providing this useful package! :)
from web-vitals.
Related Issues (20)
- Webpack Module is undefined HOT 2
- iOS Chrome Support HOT 1
- differences in TTFB in safari vs chromium based browsers HOT 1
- LCP value setting to 0 intermittently HOT 7
- Add INP breakdown entries to the attribution build HOT 3
- User consent policy HOT 1
- Firefox LCP tests failing
- Bug: LCP attribution can include `resourceLoadDelay` attribution timings far greater than the LCP value in cases where `onTTFB` discards the navigation data HOT 1
- FCP and TTFB are triggered multiple times HOT 7
- contributing LoAF basesd code that idenifies LoAF, INF and JS long tasks data HOT 1
- Capturing metadata with events HOT 2
- v4 giving undefined TypeError HOT 1
- INP: Probably a bad measurement metric for web vitals - even with simple HTML structure pages with no CSS will cause bad value. HOT 1
- Expose INP target element as first class citizen in attribution HOT 3
- Expose ability to reset internal state of metrics (specifically INP) HOT 2
- v4 INP attribution ending processingEnd time in the wrong animation frame HOT 8
- CDN JS - Web server is returning an unknown error HOT 4
- CLS and INP are being calculated incorrectly HOT 2
- Suggestion to track all attributions HOT 4
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