← React Beginner Questions - Set 9 Q86

What is the purpose of the shouldComponentUpdate lifecycle method?

React Beginner Questions - Set 9

Example

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shouldComponentUpdate(nextProps, nextState) {
  return nextProps.value !== this.props.value;   // false = skip render
}

What to notice

• Returning `false` skips the subtree too — an escape hatch, and a common source of stale UI.