getsnapshotbeforeupdate react code example

Example 1: componentDidUpdate

componentDidUpdate(prevProps, prevState) {
  if (prevState.pokemons !== this.state.pokemons) {
    console.log('pokemons state has changed.')
  }
}

Example 2: shouldcomponentupdate

shouldComponentUpdate(nextProps, nextState) {
  return true;
}

Example 3: component did mmount

componentDidMount()

Example 4: component did mmount

componentDidUpdate(prevProps, prevState, snapshot)