minesweeper.js

// One key thing with programming (particularly for games or similar things)
// is to think about the "data structure" and have this data model separate
// from the logic.

MS = {
  initialize: function(boardSize) {
    MS.world = new Array(boardSize);

    for(var i=0;i<boardSize;i++) {
      MS.world[i] = MS.initRow(boardSize);
    }
  },
  initRow: function(rowSize) {
    var row = new Array(rowSize);
    for(var i=0;i<rowSize;i++) {
      
      // Create our cell and put some attributes into the object.
      // It's expected that these attributes would expand based on the requirements
      // of the project.
      row[i] = {
        visible: false,
        bomb: false,
        flagged: false
      }
    }
    return row;
  }
}

MS.initialize(3);

console.log(MS.world);