[Feature Request] add error boundary?

[wizzard0]

If the demoed component crashes, it would be great to show error instead of crashing the entire webpage :)

Unrelated: react-heatpack does not work for me, and recommends switching to nwb (which works, just replacing heatpack with nwb react with react-demo too. nwb is also deprecated, which is sad. Looking for something similarly configuration-free and maintained)