Converts clicked coordinates to cell index in Tic Tac Toe board

ttt-find-clicked-cell-position.js

getCellIndex(position){

  for (let x = 0;x < 3;x++) {
    for (let y = 0;y < 3;y++) {
      let xCordinate = x * this.cellSize;
      let yCordinate = y * this.cellSize;

      if (
        position.x >= xCordinate && position.x <= xCordinate + this.cellSize &&
        position.y >= yCordinate && position.y <= yCordinate + this.cellSize
      ) {

        return y * 3 + x;

      }
    }
  }

}