两个div方块，碰撞到一起后其中一个方块变色
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
body{margin: 0;}
#div1{width: 300px;
height: 300px;
background: red;
position: absolute;
left: 0;
top: 0;
}
#div2{width: 200px;
height: 200px;
background: rgb(25, 245, 110);
position: absolute;
left: 600px;
top: 360px;
}
</style>
</head>
<body>
<div id="div1"></div>
<div id="div2"></div>
</body>
</html>
<script>
var div1=document.getElementById('div1')
var div2=document.getElementById('div2')
div1.onmousedown=function(event){
var chaX=event.clientX-div1.offsetLeft
var chaY=event.clientY-div1.offsetTop
console.log(chaX+"sasa")
document.onmousemove=function(event){
div1.style.left=event.clientX-chaX+'px'
div1.style.top=event.clientY-chaY+'px'
if(div1.offsetLeft+div1.offsetWidth>=div2.offsetLeft&&div1.offsetTop+div1.offsetWidth>=div2.offsetTop
&&div1.offsetLeft<=div2.offsetLeft+div2.offsetWidth&&div1.offsetTop<=div2.offsetTop+div2.offsetWidth
){
div2.style.background='#000000'
}else{div2.style.background=' rgb(25, 245, 110)'}
}
document.onmouseup=function(){
document.onmousemove=null
}
}
// div1.style.left>div2.style.left-300+'px'&&div1.style.top>div2.style.top
</script>