/Javascript/React/Parent to child react state

Parent to child react state

Update parent state from child react

class Parent extends React.Component {
    constructor(props) {
        super(props)

        // Bind the this context to the handler function
        this.handler = this.handler.bind(this);

        // Set some state
        this.state = {
            messageShown: false
        };
    }

    // This method will be sent to the child component
    handler(id) {
        this.setState({
            messageShown: true,
            id: id
        });
    }

    // Render the child component and set the action property with the handler as value
    render() {
        console.log(this.state);
        return (
           <div>
              <Child action={this.handler} />
              <div>{this.state.id}</div>
           </div>
        );
    }
}

class Child extends React.Component {
    render() {
        return (
            <div>
                {/* The button will execute the handler function set by the parent component */}
                <button onClick={() => this.props.action(1)} > button </button>
            </div>
        )
    }
}
ReactDOM.render(<Parent />, document.getElementById('main'));

Source: stackoverflow.com

Similar codes

0 vote317 views2 answers
Airbnb and eslint react native
Javascript React
0 vote316 views1 answer
Top bar in react js
Javascript React
0 vote342 views1 answer
What difference between react func and class components
Javascript React
0 vote342 views1 answer
React-bootstrap problem-import new version
Javascript React
0 vote331 views1 answer
React useEffect() the side-effect runs after every rendering
Javascript React
1 vote333 views1 answer
React native textinput no keyboard
Javascript React
0 vote349 views1 answer
React native text area form
Javascript React
8 votes335 views1 answer
React.Fragmen
Javascript React
2 votes318 views1 answer
Site cannot be accessed broken link or url that doesn’t exist react netlify
Javascript React
0 vote319 views1 answer
How to use empty href link in reactjs
Javascript React