Mancala (db555b58544181ff4c4c34b3d951f8f77e91c833) - adding ability to change game size

game.js

class MancalaGame
{
  constructor(gameSize,cnvsELID,_updatePlayerCallback,_showMsgCallback)
  {
    ...
    this.cellCount = gameSize;
    ...
    this.board = new Board(this.cellCount);
  }
  
  _initializeBoardDrawing()
  {
    ...
     drawBoard(cnvs,this.cellCount);
    ...
  }
}

index.html

<script>

        const SIZE_PARAM_NAME = 'size';
        const DEFAULT_GAME_SIZE = 14;
        const GAME_SIZE_UPPER_BOUND = 28;
        const GAME_SIZE_LOWER_BOUND = 6;
  
        ...
        
        function setup()
        {
          game = new main.MancalaGame(resolveGameSize(),'cnvsMain',updateCurrentPlayer,showMsg);
        }
  
        function resolveGameSize()
        {
          let params = new URLSearchParams(window.location.search);
          let size = (params.has(SIZE_PARAM_NAME) && !isNaN(params.get(SIZE_PARAM_NAME))) ? 
                params.get(SIZE_PARAM_NAME)*1 : DEFAULT_GAME_SIZE;
          let ret = Math.max(  //we bound the game size between the minimum and the upper bound
                      Math.min(size
                              ,GAME_SIZE_UPPER_BOUND || DEFAULT_GAME_SIZE)
                      ,GAME_SIZE_LOWER_BOUND);
          if (ret % 2 != 0) ret -= 1; //we have to make sure it's a divisble by 2.
          console.log("Game size: " + ret);
          return ret;
        }
  
</script>