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Test.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<script src="js/test.js" type="text/javascript" charset="utf-8"></script>
<title></title>
</head>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
div {
position: absolute;
font-size: 0
}
img {
display: inline
}
#a{
position: absolute;
left: 0;
top: 0;
}
#b{
position: absolute;
left: 80px;
top: 0;
}
#c{
position: absolute;
left: 0;
top: 80px;
}
#d{
position: absolute;
left: 80px;
top: 80px;
}
</style>
<body>
<div>
<div>
<img id='d' src="images/默认碰撞方块.png" alt="默认">
</div>
<div>
<img id='a' src="images/默认碰撞方块.png" alt="默认">
<img id='b' src="images/默认碰撞方块.png" alt="默认">
<img id='c' src="images/默认碰撞方块.png" alt="默认">
</div>
</div>
<script type="text/javascript">
var delta_x=0;
var delta_y=0;
document.addEventListener('keydown',(e)=>{
var ev = e || window.event;
switch(ev.keyCode){
case 37:
delta_x=-1;
break;
case 38:
delta_y=-1;
break;
case 39:
delta_x=1;
break;
case 40:
delta_y=1;
break;
default:
break;
}
},false);
document.addEventListener('keyup',(e)=>{
var ev = e || window.event;
switch(ev.keyCode){
case 37:
delta_x=0;
break;
case 38:
delta_y=0;
break;
case 39:
delta_x=0;
break;
case 40:
delta_y=0;
break;
default:
break;
}
},false);
var timer = window.setInterval(()=>{
var unit = 10;
var p = document.getElementsByTagName('div')[2];
console.log("p.id",p.id)
var left = window.getComputedStyle(p,null).left;
var top = window.getComputedStyle(p,null).top;
p.style.left=parseInt(left)+delta_x*unit+'px';
p.style.top=parseInt(top)+delta_y*unit+'px';
},50);
</script>
</body>
</html>