Parent: <div className="col-sm-9"> <SelectLanguage onSelectLanguage={this.handleLanguage} /> </div> Child: handleLangChange = () => { var lang = this.dropdown.value; this.props.onSelectLanguage(lang); }
class SomeParentComponent extends React.Component { constructor(props) { super(props); this.state = {color: 'red'}; } render() { return <SomeChildComponent color={this.state.color} />; } }