I’m surprised there are still Safari 12 users. It came out in 2018. :)
It should be easy to fix though.

I’m surprised there are still Safari 12 users. It came out in 2018. :) It should be easy to fix though.

Yeah surprised too sorta, but I'm using this on a site for audio professionals and people tend to lag a few operating systems behind due to compatibility stuff. Also, just lots of old farts who never upgrade anything hahahaha...

Are you saying this is fixable on your end, or is there an easy fix on my end? I did a bit more reading on polyfills and it sounds like I can load one for ResizeObserver to bring compatibility to Safari 12, but i wasn't sure if that'll hurt performance for everyone else.

Yes, you can load a polyfill on your end but I was talking about adding an if in wavesurfer code.

Yes, you can load a polyfill on your end but I was talking about adding an if in wavesurfer code.

Ah okay! I mean that would be awesome. In the meantime, would you happen to know how I'd use a polyfill library given that resizeobserver is used within wavesurfer's code?

this is the library I was gonna use: https://github.com/juggle/resize-observer

@katspaugh Thank you for tackling this. Unfortunately it still breaks in Safari 12, "ReferenceError: Can't find variable: ResizeObserver".

I've tried for hours to fork your code and adjust to use a polyfill (if ResizeObserver doesn't exist), but i'm running into so many issues, i'm just way out of my depth on this. If you have any time to adjust this, i'd massively appreciate it!