Barry Pollard

There are no plans to allow this library to work without Performance Observers as browsers without Performance Observer support will not support the majority of the metrics this library provides...

Similar to #320 and, as per there and the discussion above, our aim is to measure the full life cycle as much as possible. so closing this issue.

I believe this is now covered by this doc: https://web.dev/crux-and-rum-differences/

Clsoing this as sounds more like a CreateReactApp question.

Closing this a the polyfill is deprecated and will be removed in a future version. Plus it's primary use case is for FID which is less relevant now that INP...

Closing this as quite out of date now.

The [associated Chrome issue](https://bugs.chromium.org/p/chromium/issues/detail?id=1312568) was fixed in Chrome so closing this under the assumption it's now no longer an issue. Feel free to reopen if that's not the case.

Since clarified and now reads: > The web-vitals library is a tiny (~1.5K, brotli'd)

Added a link to my article in #327 and going to close this with that. We can track the debug version in #155

As updated in https://issues.chromium.org/issues/339767457#comment2 I think you're correct that this is only set once. And agree it would be good to document in MDN as not the most obvious!