Gomoku.js

const Gomoku = require('gomoku-js');

const PLAY_01 = 0;
const PLAY_02 = 1;

var game = new Gomoku( 5 );

game.setChessOf(PLAY_01, 0, 0);

game.setChessOf(PLAY_02, 0, 1);

//  ...
//
//  It will return the index of winner

game.setChessOf(PLAY_01, 0, 4);