In React Native, how can I console.log() every time state is set?

Question

Preferably 1 line code in the constructor. I don't want to console.log() on every callback of setState

Is there some listener for changes?

Answer 1

Use the componentDidUpdate lifecycle function to show the state change:

  componentDidUpdate(prevProps, prevState) {
   console.log(prevState, this.state);
  }

For detecting the actual change use deep object comparison.

Working Codesandbox example .