easiest way to pass data from child to parent in react code example
Example 1: pass element from child to parent react
Parent:
<div className="col-sm-9">
<SelectLanguage onSelectLanguage={this.handleLanguage} />
</div>
Child:
handleLangChange = () => {
var lang = this.dropdown.value;
this.props.onSelectLanguage(lang);
}
Example 2: how to pass props from child to parent
class ToDoList extends React.Component { constructor(props) { super(props); this.state = { listDataFromChild: null }; }, myCallback = (dataFromChild) => { this.setState({ listDataFromChild: dataFromChild }); }, otherFn = () => { [...within this other function now I still have access to this.state.listDataFromChild...] } render() { return ( <div> <ToDoItem callbackFromParent={this.myCallback}/> [...now here I can pass this.state.listDataFromChild as a prop to any other child component...] </div> ); }});