Comments (4)
Yeah, unfortunately carousel's are problematic for LCP, and this is something we're actively looking into making better.
Right now we have an experimental implementation in Chrome 85 to not discard elements removed from the DOM, which should help most carousel cases, but we need to gather data on that first to make sure it doesn't have other unintended consequences.
I know "we're working on it" probably isn't the most satisfying answer, but it is the reality of the current situation.
For the perspective of this library, it's working as intended because it's just reporting what the underlying web API is reporting. And any changes we make to the web API to better handle carousel cases should not require any changes to this library.
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hi @philipwalton thanks for the reply, please let us know if there was an update to this issue. LCP is a very important metric since its part of web vitals which will be a ranking factor for SEO in the future, i really hope we won't be penalized for using a carousel because our users seem to love that feature :) For testing purposes you can visit our production site https://www.pogo.com/
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The latest update is it's looking like our experimental implementation to not ignore removed DOM elements was successful and will land, so LCP should be much more carousel-friendly in the near future (most likely in Chrome 88).
Since this issue doesn't require any changes to this library, I'm going to close this issue.
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Thanks!
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Related Issues (20)
- 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
- Allow to reset the INP calculation 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
- CLS being reported due to filter CSS transition HOT 3
- Firefox e2e tests flakey HOT 3
- can't find ReportCallback or ReportHandler type HOT 3
- Are there any updates for soft-navs? HOT 2
- LoAF missed for some INP events HOT 9
- Facing issue while exporting `web-vitals/attribution` using `browserify` HOT 2
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