Math random in react code example

Example 1: javascript get random number in range

function getRandomNumberBetween(min,max){
    return Math.floor(Math.random()*(max-min+1)+min);
}

//usage example: getRandomNumberBetween(20,400);

Example 2: js random int

function getRandomInt(min, max) {
    min = Math.ceil(min);
    max = Math.floor(max);
    return Math.floor(Math.random() * (max - min + 1)) + min;
}

Example 3: random reacths

class Button extends React.Component {

  constructor(props) {
   super(props);
   this.state = {
   random: 0
    }
   }


   render() {
   var min = 1;
   var max = 100;
   var rand =  min + (Math.random() * (max-min));
   handleClick() {
    this.setState ({this.state.random + this.rand})
   }
    return (
      <div>
       <button value="Click me!" onClick={this.handleClick.bind(this)></button>
       </div>
      );

 React.render(<Button />, document.querySelector('#container'));

  }
}