warn about infinite loops

[souporserious]

Just ran into this. Should have some documentation noting that infinite loops are easy if you aren't paying attention to measure + setState.

Here's a simple example to prevent infinite looping

handleInputResize = ({ bounds }) => {
  if (this.state.inputWidth !== bounds.width) {
    this.setState({ inputWidth: bounds.width })
  }
}

Maybe there's a better way to prevent this or even warn when onResize updates too much? I'm open to ideas.

[ilyabo]

This can also happen even without setState. E.g. when the content changes depending on the sizes and the change in the content in turn affects the sizes. I think it would make sense to warn about this in the README.

[jrmyio]

Also ran into this! At least it wasn't a big in itself :)