ReactJS: Warning: setState(…): Cannot update during an existing state transition

Question

I am trying to refactor the following code from my render view:

Answer 1

This same warning will be emitted on any state changes done in a render() call.

An example of a tricky to find case: When rendering a multi-select GUI component based on state data, if state has nothing to display, a call to resetOptions() is considered state change for that component.

The obvious fix is to do resetOptions() in componentDidUpdate() instead of render().