/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 vote205 views1 answer
React chat sheet
Javascript React
32 votes212 views6 answers
Font awesome react
Javascript React
0 vote240 views1 answer
How to add comma in react map
Javascript React
0 vote230 views1 answer
Border radius not working ios react native
Javascript React
3 votes179 views2 answers
React api call
Javascript React
-1 vote218 views1 answer
Component navigation without changin the url react router
Javascript React
0 vote204 views1 answer
React.createElement pass props
Javascript React
4 votes207 views2 answers
Entypo icons react native
Javascript React
110 votes214 views2 answers
Create react js app
Javascript React
0 vote214 views1 answer
Yarn react-native-async-storage
Javascript React