Uncaught DOMException: Failed to execute 'getRangeAt' on 'Selection': 0 is not a valid index.

Hi, just bumped into this, the solution is to check `selection.rangeCount !== 0` before calling `selectino.getRangeAt(0)`

https://stackoverflow.com/questions/22935320/uncaught-indexsizeerror-failed-to-execute-getrangeat-on-selection-0-is-not

I got into this because I called `getState()` while disabled option is true