Most simple example to pass data from child to parent in react

index.js

class Parent extends React.Component{
    useDataFromChild = (value) => {
        console.log(value)
    }

    render() {
         return (
                <div>
                    <Child name="Option: Little" onReceiveData={this.useDataFromChild}/>
                    <Child name="Option: Many" onReceiveData={this.useDataFromChild}/>
                </div>
        )
     }
}

class Child extends React.Component {
    sendData = () => {
        this.props.onReceiveData(this.props);            
    }

    render() {
        return (
            <div >
                <div onClick={this.sendData}>{this.props.name}</div>
            </div>            
        );
    }
}

ReactDOM.render(<Parent/>, document.getElementById('root'));