<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<link rel="stylesheet" href="demo.css">
</head>
<body>
<div class="wrapper">
<div id = "go">Game Start</div>
<!-- 运动的dom -->
<div id="main"></div>
</div>
<script src = "demo.js"></script>
</body>
</html>
*{
margin: 0;
padding: 0;
}
.wrapper{
position: relative;
width: 400px;
height: 600px;
border: 1px solid black;
margin :160px auto;
overflow: hidden;
}
#go{
position:absolute;
left:0;
top: 0;
width: 100%;
height: 100px;
border-bottom: 1px solid #000;
font-weight: bolder;
font-size: 60px;
line-height: 100px;
text-align: center;
cursor: pointer;
z-index: 999;
}
#main{
position: relative;
width:400px;
height: 600px;
}
.row{
width: 400px;
height: 150px;
}
.row div{
float: left;
width: 100px;
height: 150px;
border: 1px solid #000;
box-sizing: border-box;
}
var go = document.getElementById('go');
var main = document.getElementById('main');
var timer;
var speed = 5,num = 0,flag = true;
function bindEvent() {
go.addEventListener('click', function () {
go.style.display = 'none';
move();
});
main.addEventListener('click',function(e){
if(flag){
var tar = e.target;
if(tar.className == 'tar'){
tar.style.backgroundColor = '#bbb';
tar.classList.remove('tar');
num++;
}else{
clearInterval(timer);
alert('游戏结束吧得分'+num);
flag = false;
}
}
});
}
bindEvent();
function move() {
timer = setInterval(function(){
var step = parseInt(main.offsetTop)+speed;
main.style.top = step+'px';
if(parseInt(main.offsetTop)>=0){
main.style.top = '-150px';
cDiv();
}
var len = main.childNodes.length;
if(len == 6){
var lastRow = main.childNodes[len -1];
for(var i = 0;i<4;i++){
if(lastRow.childNodes[i].classList.contains('tar')){
clearInterval(timer);
alert('游戏结束得分:'+num);
flag = false;
}}
main.removeChild(main.childNodes[len - 1]);
}
}
,20 );
}
function cDiv() {
var color = ['red','blue','green','pink'];
var oDiv = document.createElement('div');
var index = Math.floor(Math.random()*4);
for (var i = 0; i < 4; i++) {
var iDiv = document.createElement('div');
oDiv.appendChild(iDiv);
}
var clickDiv = oDiv.childNodes[index];
clickDiv.setAttribute('class','tar');
clickDiv.style.backgroundColor = color[index];
oDiv.setAttribute('class', 'row');
if (main.childNodes.length == 0) {
main.appendChild(oDiv);
} else {
main.insertBefore(oDiv, main.childNodes[0]);
}
}