Resizeobserver One Vs Multiple Performance

The ResizeObserver has an observe() method and an unobserve() method. This seems to encourage having one ResizeObserver instance and observing and unobserving different elements as

Solution 1:

Looks like reusing (one) the ResizeObserver is preferred and more preformant:

https://github.com/WICG/ResizeObserver/issues/59#issuecomment-408098151https://groups.google.com/a/chromium.org/forum/#!msg/blink-dev/z6ienONUb5A/F5-VcUZtBAAJ