React biding code example

Example 1: react onclick parameter

import React from 'react';

const ExampleComponent = () => {
  
  function sayHello(name) {
    alert(`hello, ${name}`);
  }
  
  return (
    <button onClick={() => sayHello('James')}>Greet</button>
  );
}

export default ExampleComponent;

Example 2: two way binding react

class App extends React.Component {
  constructor() {
    super();
    this.state = {value : ''}
  }
  handleChange = (e) =>{ 
    this.setState({value: e.target.value});
  }
  render() {
    return (
    <div>
        <input type="text" value={this.state.value} onChange={this.handleChange}/>
        <div>{this.state.value}</div>
    </div>
   )
  }
}
ReactDOM.render(<App/>, document.getElementById('app'));