Can't pass sizes to parent components

[Cory Simmons]

This would be really handy with things like styled-components. I peeked at the source and it looks like it's using useEffect under the hood, so I'm not sure why it isn't able to watch/update appropriately.

https://codesandbox.io/s/useresizeobserver-react-hook-cstgc

[Viktor Hubert]

You have a missing px in your CSS calc, just change it to:
calc(300px + ${props.h}px)

[Cory Simmons]

hah, my bad. Thanks Viktor. :)