store.js

function Store() {
  this.state = {};
  this.state = this.update(this.state, {});
  // `this.update()` will return the initial state:
  // ----------------------------------------------
  // {
  //   grid: ['', '', '', '', '', '', '', '', ''],
  //   turn: 'x',
  //   score: { x: 0, o: 0 },
  //   winnerSequence: [],
  //   turnCounter: 0,
  //   player: ''
  // }
}