tic-tac-toe-1.js

Board.prototype.isWinner = function () {
  if ((this.state[0] == this.state[1] == this.state[2] == 1)
   || (this.state[3] == this.state[4] == this.state[5] == 1)
   || (this.state[6] == this.state[7] == this.state[8] == 1)
   || (this.state[0] == this.state[3] == this.state[6] == 1)
   || (this.state[1] == this.state[4] == this.state[7] == 1)
   || (this.state[2] == this.state[5] == this.state[8] == 1)
   || (this.state[0] == this.state[4] == this.state[8] == 1)
   || (this.state[1] == this.state[4] == this.state[6] == 1)) {
    return 1;
  } else if ((this.state[0] == this.state[1] == this.state[2] == 2)
          || (this.state[3] == this.state[4] == this.state[5] == 2)
          || (this.state[6] == this.state[7] == this.state[8] == 2)
          || (this.state[0] == this.state[3] == this.state[6] == 2)
          || (this.state[1] == this.state[4] == this.state[7] == 2)
          || (this.state[2] == this.state[5] == this.state[8] == 2)
          || (this.state[0] == this.state[4] == this.state[8] == 2)
          || (this.state[1] == this.state[4] == this.state[6] == 2)) {
    return 2;
  } else {
    return 0;
  }
};