纯JS实现五子棋游戏：从表格布局到胜负判定逻辑

<!DOCTYPE html>
<html>
 <head>
 <meta charset="UTF-8">
 <title></title>
 </head>
 <link rel="stylesheet" href="../bootstrap-3.3.7/dist/css/bootstrap.min.css" rel="external nofollow" />
 <script type="text/javascript" src="../js/jquery.min.js"></script>
 <body>
 <table id="tab" class="table table-bordered table-hover" style="width: 50%;">
  <tbody id="tb">
  </tbody>
 </table>
 <button id="reloadTb" class="btn btn-primary btn-block" style="width: 20%;">重置棋盘 </button>
 </body>
 <script type="text/javascript">
 var k = 1;
 var countRow = 14;

 $(function() {
  createTable();
 })
 
 $("#reloadTb").click(function() {
  $("#tb").empty();
  createTable();
 })

 var createTable = function() {
  for(let i = 0; i < countRow; i++) {
  let tr = $("<tr></tr>");
  for(var j = 0; j < countRow; j++) {
   let td = $("<td style='background-color: #FDF5E6;'></td>");
   td.css("height", "40px");
   td.css("width", "40px");
   tr.append(td);
   td.appendTo(tr).bind('click', tdClick);
  }
  $("#tb").append(tr);
  }
 }

 function tdClick() {
  var hang = $(this).parent("tr").prevAll().length;
  var lie = $(this).prevAll().length;
  hang = Number(hang); //字符串变为数字
  lie = Number(lie);
  //console.log("第" + hang + "行" + "第" + lie + "列");
  if(k == 1) {
  $(this).css("background-color", "black");
  $(this).css("color", "black");
  $(this).html(1);
  $(this).unbind("click");
  checksuc(hang, lie, 1);
  k++;
  } else {
  $(this).css("background-color", "white");
  $(this).css("color", "white");
  $(this).html(2);
  $(this).unbind("click");
  checksuc(hang, lie, 2);
  k--;
  }
 }

 function checksuc(hang, lie, flag) {
  let trArr = $("#tb").children();
  var leftNum = 0,rightNum = 0,i;
  /**
  * 左右判断
  */
  i = lie - 1;
  leftNum = caculate(i, hang, lie, flag, leftNum, trArr, 1, 1);
  i = lie + 1;
  rightNum = caculate(i, hang, lie, flag, rightNum, trArr, 2, 1);
  if(alert2((leftNum + rightNum), flag) != -1){
  return false;
  }
  /**
  * 上下判断
  */
  leftNum = 0;
  rightNum = 0;
  i = hang - 1;
  leftNum = caculate(i, hang, lie, flag, leftNum, trArr, 1, 2);
  i = hang + 1;
  rightNum = caculate(i, hang, lie, flag, rightNum, trArr, 2, 2);
  if(alert2((leftNum + rightNum), flag) != -1){
  return false;
  }

  leftNum = 0;
  rightNum = 0;//初始化数值
  let hang2,lie2;
  /**
  * 左斜判断
  */
  hang2 = hang;
  lie2 = lie;
  leftNum = obliqueCheck(hang2, lie2, trArr, flag, leftNum, 1, 1);
  hang2 = hang;
  lie2 = lie;
  rightNum = obliqueCheck(hang2, lie2, trArr, flag, rightNum, 2, 2);
  if(alert2((leftNum + rightNum), flag) != -1){
  return false;
  }
  
  leftNum = 0;
  rightNum = 0;//初始化数值
  hang2 = hang;
  lie2 = lie;
  /**
  * 右斜判断
  */
  leftNum = obliqueCheck(hang2, lie2, trArr, flag, leftNum, 2, 1);
  hang2 = hang;
  lie2 = lie; //初始化数值
  rightNum = obliqueCheck(hang2, lie2, trArr, flag, rightNum, 1, 2);
  alert2((leftNum + rightNum), flag);
 }

 function obliqueCheck(hang2, lie2, trArr, flag, num, subtractHang, subtractLie) {
  while(hang2 >= 0 && lie2 >= 0) {//左斜右斜判断的时候行和列的左边都必须大于0
  hang2 = subtractHang == 1 ? (hang2 - 1) : (hang2 + 1);
  lie2 = subtractLie == 1 ? (lie2 - 1) : (lie2 + 1);
  var val = trArr.eq(hang2).find("td").eq(lie2).html();
  if(flag == val) {
   num++;
  } else {
   break;
  }
  }
  return num;
 }
 
 function caculate(i, hang, lie, flag, num, trArr, ff, dd) {
  //ff用来判断while里的条件,dd判断列使用的哪个参数
  var result;
  result = (ff == 1) ? (i >= 0) : (i < countRow);
  while(result) {
  var val = trArr.eq(dd == 1 ? hang : i).find("td").eq(dd == 2 ? lie : i).html();
  if(flag == val) {
   num++;
  } else {
   break;
  }
  i = ff == 1 ? (i - 1) : (i + 1);
  result = (ff == 1) ? (i >= 0) : (i < countRow);
  }
  return num;
 }

 function alert2(count, flag) {
  if(count == 4) {//左边相同棋子加右边棋子为4则符合
  if(flag == 1) {
   alert("黑棋胜");
  } else {
   alert("白棋胜");
  }
  return 1;
  }
  return -1;
 }
 /*while(i >= 0) { //1
  var val = trArr.eq(hang).find("td").eq(i).html(); //1
  if(flag == val) {
   leftNum++;
  } else {
   break;
  }
  i--;
  }*/
 /*while(i < countRow) { //2
  var val = trArr.eq(hang).find("td").eq(i).html(); //1
  if(flag == val) {
  rightNum++;
  } else {
  break;
  }
  i++;
 }*/
 /*while(i >= 0) {
  var val = trArr.eq(i).find("td").eq(lie).html();
  if(flag == val) {
  leftNum++;
  } else {
  break;
  }
  i--;
 }
 i = hang + 1;
 while(i < countRow) {
  var val = trArr.eq(i).find("td").eq(lie).html();
  if(flag == val) {
  rightNum++;
  } else {
  break;
  }
  i++;
 }*/
 </script>
</html>