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React Class components LifeCycles

Implementing state lifecycle in react class component

class Example extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      count: 0
    };
  }

  componentDidMount() {
    document.title = `You clicked ${this.state.count} times`;
  }
  componentDidUpdate() {
    document.title = `You clicked ${this.state.count} times`;
  }

  render() {
    return (
      <div>
        <p>You clicked {this.state.count} times</p>
        <button onClick={() => this.setState({ count: this.state.count + 1 })}>
          Click me
        </button>
      </div>
    );
  }
}

Source: reactjs.org

React Class components LifeCycles

1) componentDidMount() {}
2) componentDidUpdate(prevProps, prevState, snapshot) {}
3) shouldComponentUpdate(nextProps, nextState) {}
4) componentWillUnmount() {}

Source: medium.com

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