Child -> Parent communication in React

setParentState.jsx

import React, { Component } from 'react';

class Parent extends Component {
  getInitialState(){
    return {
      title: 'Hello world!';
    }
  }
  render(){
    return (
      <div>
        <h2>{this.state.title}</h2>
        <Child setParentState={this.setState.bind(this)} />
      </div>
    )
  }
}

class Child extends Component {
  propagateToParent(e){
    e.preventDefault();
    
    this.props.setParentState({ title: 'Goodbye cruel world!' });
  }
  
  render(){
    return (
      <p>You should be able to <a href="#" onClick={this.propagateToParent.bind(this)}>click me</a></p>
    )
  }
}