react pass a function as prop code example

Example 1: pass function with parameter as prop

class SomeComponent extends Component{

    constructor(props){
        super(props);
        //does whatever stuff        
        this.myFunction = this.myFunction.bind(this);

    }

    //(only applicable to raw and normal forms)
    myFunction(param){
        console.log('do something: ', param);
    }

    render(){
     return (<div><ChildComponent1 myFunction={this.myFunction}/></div>)
    }
}

class ChildComponent1{
      render(){
  return (<div><ChildComponent2 myFunction={this.props.myFunction}/></div>)
    }
}

class ChildComponent2{
      render(){
  return (<Button onClick={()=>this.props.myFunction(param)}>SomeButton</Button>)
    }
}

Example 2: react pass parameter to component

import React, { Component } from 'react'; class App extends Component {  render() {    return (      <div>        <Greeting />      </div>    );  }} class Greeting extends Component {  render() {    const greeting = 'Welcome to React';     return <h1>{greeting}</h1>;  }} export default App;