react lifecycle hooks

instantiate

• construtor//constructor
• componentWillMount//Before mounting, setState can be modified
• render//Render the real dom
• componentDidMount//After the first render, only once, you can setState

Existence

• componentWillReceiveProps//When the props are updated when the parent component renders, regardless of whether the props change
• shouldComponentUpdate//It is called automatically after modifying the state. It returns true by default, and false skips the latter. Use less
• componentWillUpdate//It is called automatically before modifying the state's render, similar to CWM
• render
• Called after componentDidUpdate//render, do not modify the state infinite loop as a last resort

Destruction period

• componentWillUnmount//before destruction