ReactStateÖrnek

class App extends Component 
{
  constructor(props) 
  {
    super(props);
    this.state = { deger: 0 }
    this.arttirFunction = this.arttirFunction.bind(this)
  };
  arttirFunction() 
  {
    this.setState({ deger: this.state.deger + 1 })
  }
  render() 
  {
    return (
      <div>
        <button onClick={this.arttirFunction}>Arttir</button>
         <h3>Deger : {this.state.deger}</h3>
      </div>
    );
  }
}