JS mini game Fairy Sword Flop source code detailed explanation_javascript skills

The example in this article describes the source code of the JS mini-game Fairy Sword Flop, which is a very excellent game source code. Share it with everyone for your reference. The details are as follows:

1. Game introduction:

This is a card matching game with ten levels in total.

1. The game randomly selects 9 cards from 42 cards to play. Each group has 2 identical cards, a total of 18 cards.
2. If you turn over two identical ones in a row, you win. When all 9 groups are turned over, you pass the level. If you don't find two consecutive identical ones, you need to turn them over again.
3. There are 10 levels in the game. Passing the level within the specified time means the challenge is successful.
4. If a level is not passed within the specified time, the game will continue from the current level.
5. The card pictures and music in the game are owned by Daewoo Corporation.
6. A browser that supports HTML5 is required. Chrome and Firefox work best.

Game pictures:

Click here for the complete example codeDownload from this site.

2. Javascript part:

/** 仙剑翻牌游戏
*  Date:  2013-02-24
*  Author: fdipzone
*  Ver   1.0
*/
window.onload = function(){
  var gameimg = [
          'images/start.png', 
          'images/success.png',
          'images/fail.png',
          'images/clear.png',
          'images/cardbg.jpg',
          'images/sword.png'
         ];

  for(var i=1; i<=card.get_total(); i++){
    gameimg.push('images/card' + i + '.jpg');
  }

  var callback = function(){
    card.init();
  }

  img_preload(gameimg, callback);
}

/** card class */
var card = (function(total,cardnum){

  var gametime = [0,65,60,55,50,45,40,35,30,25,20]; // 每关的游戏时间
  var turntime = 8;                 // 观看牌时间
  var level = 1;                  // 当前关卡
  var carddata = [];                // 记录牌的数据
  var leveldata = [];                // 当前关卡牌数据
  var is_lock = 0;                 // 是否锁定
  var is_over = 0;                 // 游戏结束
  var first = -1;                  // 第一次翻开的卡
  var matchnum = 0;                 // 配对成功次数

  // 初始化
  init = function(){
    tips('show');
    $('startgame').onclick = function(){
      tips('hide');
      start();
    }
  }

  // 开始游戏
  start = function(){
    reset();
    create(cardnum);
    show();

    var curtime = turntime;

    setHtml('livetime', curtime);
    
    var et = setInterval(function(){
      if(curtime==0){
        clearInterval(et);
        turnall();
        set_event();
        message('start', process);
        return ;
      }

      if(curtime==turntime){
        turnall();
      }

      curtime--;
      setHtml('livetime', curtime);
    }, 1000)
  }

  // 随机抽取N张牌
  create = function(n){
    carddata = [];
    leveldata = [];
    
    // 创建所有牌
    for(var i=1; i<=total; i++){
      carddata.push(i);
    }
  
    // 抽取牌
    for(var i=0; i<n; i++){
      var curcard = carddata.splice(Math.random()*carddata.length, 1).pop();
      leveldata.push({'cardno':curcard,'turn':0}, {'cardno':curcard,'turn':0});
    }

    // 生成随机顺序游戏牌
    leveldata = shuffle(leveldata);
  }

  // 生成牌
  show = function(){
    var cardhtml = '';
    for(var i=0; i<leveldata.length; i++){
      cardhtml += '<div class="cardplane">';
      cardhtml += '<div class="card viewport-flip" id="card' + i + '">';
      cardhtml += '<div class="list flip out"><img src="images/card' + leveldata[i]['cardno'] + '.jpg"></div>';
      cardhtml += '<div class="list flip"><img src="images/cardbg.jpg"></div>';
      cardhtml += '</div>';
      cardhtml += '</div>';

    }
    setHtml('gameplane', cardhtml);
  }

  // 全部翻转
  turnall = function(){
    for(var i=0; i<leveldata.length; i++){
      turn_animate(i);
    }
  }

  // 翻转动画
  turn_animate = function(key){
    var obj = $_tag('div', 'card' + key);
    var cardfont, cardback;
    
    if(getClass(obj[0]).indexOf('out')!=-1){
      cardfont = obj[0];
      cardback = obj[1];
    }else{
      cardfont = obj[1];
      cardback = obj[0];
    }

    setClass(cardback, 'list flip out');
    var et = setTimeout(function(){
      setClass(cardfont, 'list flip in');
    }, 225);
  }

  // 设置点击事件
  set_event = function(){
    var o = $_tag('div', 'gameplane');
    for(var i=0,count=o.length; i<count; i++){
      if(getClass(o[i])=='card viewport-flip'){
        o[i].onclick = function(){
          turn(this.id);
        }
      }
    }
  }

  // 计时开始
  process = function(){

    is_lock = 0;

    var curtime = gametime[level];
    setHtml('livetime', curtime);

    var et = setInterval(function(){
      if(matchnum==cardnum){
        clearInterval(et);
        return ;
      }
      curtime--;
      setHtml('livetime', curtime);
      
      if(curtime==0){
        clearInterval(et);
        is_over = 1;
        message('fail', start);
      }

    }, 1000);
  }


  // 游戏讯息动画
  message = function(type, callback){

    is_lock = 1;

    var message = $('message');
    var processed = 0;
    var opacity = 0;
    var soundtime = {
          'start': 1500,
          'success': 4000,
          'fail': 6000,
          'clear': 4000
    };

    disp('message','show');
    setClass(message,'message_' + type);
    setOpacity(message, opacity);
    setPosition(message, 'left', 0);
    setPosition(message, 'top', 390);

    if(type=='start'){
      bgsound(type, true);
    }else{
      bgsound(type);
    }

    var et = setInterval(function(){
      var message_left = getPosition(message,'left');
      processed = processed + 25;

      if(processed>=500 && processed<=750){
        opacity = opacity+10;
        setPosition(message, 'left', message_left + 30);
        setOpacity(message, opacity);
      }else if(processed>=soundtime[type] && processed<=soundtime[type]+250){
        opacity = opacity-10;
        setPosition(message, 'left', message_left + 35);
        setOpacity(message, opacity);
      }else if(processed>soundtime[type]+250){
        disp('message','hide');
        clearInterval(et);
        if(typeof(callback)!='undefined'){
          callback();
        }
      }
    },25);
  }

  // 翻牌
  turn = function(id){
    if(is_lock==1){
      return ;
    }

    var key = parseInt(id.replace('card',''));
  
    if(leveldata[key]['turn']==0){ // 未翻开
      if(first==-1){ // 第一次翻
        turn_animate(key);
        first = key;
        leveldata[key]['turn'] = 1;
      }else{ // 第二次翻
        turn_animate(key);
        leveldata[key]['turn'] = 1;
        check_turn(key);
      }
    }
  }

  // 检查是否翻牌成功
  check_turn = function(key){
    is_lock = 1;

    if(leveldata[first]['cardno']==leveldata[key]['cardno']){ // 配对成功
      matchnum ++;

      if(matchnum==cardnum){
        var et = setTimeout(function(){
          message('success', levelup);
        }, 225);
      }
      first = -1;
      is_lock = 0;

    }else{ // 配对失败,将翻开的牌翻转

      var et = setTimeout(function(){
          turn_animate(first);
          leveldata[first]['turn'] = 0;
          turn_animate(key);
          leveldata[key]['turn'] = 0;

          first = -1;
          
          if(is_over==0){
            is_lock = 0;
          }
        }, 300);
    }
  }

  // 过关
  levelup = function(){
    if(level<gametime.length-1){
      level ++;
      setHtml('level', level);
      start();
    }else{
      clear();
    }
  }

  // 全部通关
  clear = function(){
    level = 1;
    disp('levelplane','hide');
    disp('process', 'hide');
    setHtml('gameplane','');
    message('clear',init);
  }

  // 音乐播放
  bgsound = function(file, loop){
    var id = 'audioplayer';

    if(typeof(file)!='undefined'){
      if(typeof(loop)=='undefined'){
        loop = false;
      }

      var audiofile = [];
      audiofile['mp3'] = 'music/' + file + '.mp3';
      audiofile['ogg'] = 'music/' + file + '.ogg';
      audioplayer(id, audiofile, loop);
    }else{
      audioplayer(id);
    }
  }

  // 游戏玩法
  tips = function(type){
    disp('tips', type);
  }

  // 获取牌总数
  get_total = function(){
    return total;
  }

  // 重置参数
  reset = function(){
    disp('levelplane','show');
    setHtml('level', level);
    disp('process', 'show');
    setHtml('livetime', '');
    setHtml('gameplane', '');
    is_lock = 1;
    is_over = 0;
    first = -1;
    matchnum = 0;
  }

  return this;

})(42,9);

I believe that what is described in this article has certain reference value for everyone’s learning of javascript game design.