How to implement a guessing game using JavaScript (detailed tutorial)

      
  
 
 
 
我：name
 
 
 
 
电脑：name
 
 
 
 
 开始 
 
请开始游戏...
 
 
 
石头
 
 
 
剪刀
 
 
 
布
 
 
 
   

*{ margin:0px; padding:0px; font-family:'迷你简卡通'; font-size:28px; } html,body{ width:100%; height:100%; background:rgba(244, 184, 202, 1); } ul{ list-style:none; } #game{ width:800px; height:600px; margin:auto; top:20%; } #game ul{ width:100%; height:415px; } #game ul li{ width:50%; height:100%; float:left; text-align:center; } #game ul li .anim{ width:223px; height:337px; border:10px solid #ff6699; border-radius:50%; margin:20px auto 0; background-position:center; background-repeat:no-repeat; } .user{ background:url('../img/readyl.png'); } .comp{ background:url('../img/readyr.png'); } #game .op{ width:100%; text-align:center; } #game .op button{ width:200px; height:60px; border:10px solid #ff6699; background:rgb(253, 217, 227); border-radius:50%; outline:none; cursor:pointer; font-weight:bold; } #game .op button:hover{ border-color:#ff0000; background-color:#ff0000; font-size:36px; color:rgb(253, 217, 227); } #game .op button.disabled{ border-color:#bbb; color:#bbb; background-color:#ccc; font-size:28px; cursor:default; } #game .guess{ width:220px; height:100%; position:fixed; top:0px; left:0px; display:none; } #game ul.guess li{ width:100%; height:32%; } #game ul.guess li p{ width:100%; height:90%; border:10px solid #ff6699; border-radius:50%; background-position:center; background-repeat:no-repeat; cursor:pointer; background-color:rgba(244, 184, 202, 1); } #game ul.guess li p:hover{ background-color:#ff6699; color:#fff; } p.guess0{ background-image:url('../img/0.png'); } p.guess1{ background-image:url('../img/1.png'); } p.guess2{ background-image:url('../img/2.png'); } #game p.text{ margin-top:20px; text-align:center; font-size:50px; font-weight:bold; }

Function.prototype.extend = function( fn ){ for( var attr in fn.prototype ){ this.prototype[attr] = fn.prototype[attr]; } } //父级构造函数用于继承,共有属性 function Caiquan( name ){ this.name = name; this.point = 0; } //用于继承下面衍生，共有方法 Caiquan.prototype.guess = function(){} //继承父，玩家的构造函数 function User( name ){ Caiquan.call(this,name); } User.extend( Caiquan ); User.prototype.guess = function( point ){ return this.point = point; } //电脑的构造函数 function Comp( name ){ Caiquan.call(this,name); } Comp.extend( Caiquan ) ; //电脑的猜拳方法，随机 Comp.prototype.guess = function(){ return this.point = Math.floor( Math.random()*3 ); } //裁判构造函数 function Game( u , c ){ this.text = document.getElementById('text'); this.btn = document.getElementById("play"); this.user = u; this.comp = c; this.classN =document.getElementsByClassName('name'); this.guess = document.getElementById("guess"); this.anim = document.getElementsByClassName("anim"); this.num = 0; this.init(); this.tiemr = null; } Game.prototype.Caiquan = function(){ this.textValue( '请出拳...' ); this.BtnDisable(); this.start(); this.guess.style.display = 'block'; } //怎么玩 Game.prototype.start = function(){ var This = this; this.timer = setInterval(function(){ This.anim[0].className = 'anim user guess' +( ( This.num ++ ) % 3 ); This.anim[1].className = 'anim comp guess' + ( ( This.num ++ ) % 3 ) ; },500) } //初始化名字 Game.prototype.init = function(){ this.classN[0].innerHTML = '我:' + this.user.name; this.classN[1].innerHTML = '电脑:' + this.comp.name; } //提示面板区域的修改 Game.prototype.textValue = function( val ){ this.text.innerHTML = val; } //按钮失效 Game.prototype.BtnDisable = function(){ if( this.btn.disabled ){ this.btn.disabled = false; this.btn.className =''; this.btn.innerHTML = '再来一次' }else{ this.btn.disabled = true; this.btn.className ='disabled'; } } Game.prototype.verdict = function( point ){ clearInterval(this.timer); var userGu = user.guess(point); var compGu = comp.guess(); this.anim[0].className = 'anim user guess' + userGu; this.anim[1].className = 'anim comp guess' + compGu; var res = userGu - compGu; switch (res){ case 0: this.textValue('平局!!!') break; case 1: case -2: this.textValue('lose~~~'); break; case 2: case -1: this.textValue('win!!!') break; } this.guess.style.display = 'none'; this.BtnDisable(); } var user = new User( '锐雯' ); var comp = new Comp( '拉克丝' ); var game = new Game( user , comp );