/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

3 votes58 views3 answers
How to hide source for react project
Javascript React
103 votes42 views7 answers
How to create react app
Javascript React
0 vote6 views1 answer
'{ state: any; dispatch: React.Dispatch<{ type: string; payload: any; }>; }' is not assignable to type 'Store'
Javascript React
0 vote53 views1 answer
Justifycontent react native flatlist
Javascript React
0 vote58 views1 answer
React state deconstructed
Javascript React
1 vote51 views2 answers
React Context API
Javascript React
0 vote49 views1 answer
Render(<App />); const linkElement = screen.getByText(/learn react/i); expect(linkElement).toBeInTheDocument();
Javascript React
0 vote56 views1 answer
React native custom debounce input
Javascript React
1 vote54 views1 answer
How to call create react app
Javascript React
0 vote68 views1 answer
Truncate function react
Javascript React