Here is just another Example:

import React from 'react'
class App extends React.Component {
  constructor(props) {
    super(props);
    var storedClicks = 0;

    if (localStorage.getItem('clicks')) {
      storedClicks = parseInt(localStorage.getItem('clicks'));
    }

    this.state = {
      clicks: storedClicks,
    };
    this.click = this.click.bind(this);
  }

  click() {
    var newclick = this.state.clicks + 1;
    this.setState({clicks: newclick});
    // Set