allow the usage of a custom resize observer class

[javiergonzalezGenially]

I'd like to inject a polyfill when window.ResizeObserver is not available. By adding a customResizeObserver optional option I could do:

{
  ...
  customResizeObserver: window.ResizeObserver || resizeObserverPolyfill
}

This PR does that.

[ZeeCoder]

You can simply polyfill your environment prior to including your app code, or do it within your bundler.
See the rollup config I use to create a polyfilled version here.

The quickest solution could also be making a module like this:

import useResizeObserver from 'use-resize-observer';
import resizeObserverPolyfill from 'some-resize-observer-polyfill';


if (!window.ResizeObserver) {
    window.ResizeObserver = resizeObserverPolyfill;
}

export default useResizeObserver;

[github-actions]

🎉 This issue has been resolved in version 8.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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