Posted in Javascript onDecember 30, 2020
js实现鼠标的拖曳效果，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
效果如下：
下面是代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>鼠标拖曳效果</title>
<style>
body{
background:black;
}
#box{
position:absolute;
background: rgb(148, 143, 143);
width: 400px;
height: 200px;
box-sizing: border-box;
border: white 2px solid;
}
.topTitle{
cursor: move;
border-bottom: white 2px solid;
background: #cccccc;
text-align: right;
color: white;
height: 20px;
line-height: 20px;
}
.content >div{
background: rgb(148, 143, 143);
height: 50px;
line-height: 50px;
color: white;
text-align: left;
}
</style>
</head>
<body>
<div id="box">
<div class="topTitle"><a href="#" >点击回放拖动轨迹</a></div>
<div class="content">
<div>Drag:</div>
<div>offsetTop:</div>
<div>offsetLeft</div>
</div>
</div>
</body>
<script>
var oBox=document.getElementById("box");
var oTopTitle=document.getElementsByClassName("topTitle")[0];
var aDiv= document.querySelectorAll(".content >div");
var offWidth=document.documentElement.clientWidth;
var clHight=document.documentElement.clientHeight;
var i,t;
var state="false";
var oText=document.querySelector(".topTitle a");
oTopTitle.onmousedown=function(even){
var OffsetE=even||window.event;
var flag=true;
//设立边界：
document.onmousemove=function(even){
state="true";
var ClientE=even||window.event;
l=ClientE.clientX-OffsetE.offsetX;
t=ClientE.clientY-OffsetE.offsetY;
recorde(l,t,flag);
if(l<0){
l=0;
}
if(t<0){
t=0;
}
if(l>offWidth-oBox.offsetWidth){
l=offWidth-oBox.offsetWidth;
}
if(t>clHight-oBox.offsetHeight){
t=clHight-oBox.offsetHeight;
}
oBox.style.left=l+"px";
oBox.style.top=t+"px";
}
document.onmouseup=function(){
console.log(1);
state="false";
document.onmousemove=null;
document.onmouseup=null;
}
OffsetE.preventDefault();
flag=false;
}
oText.onclick=function(){
var reback=recorde(l,t);
var index=reback.strX.length;
setInterval(function(){
if(index<0){
clearInterval();
return;
}
oBox.style.left=reback.strX[index--]
+"px";
oBox.style.top=reback.strY[index--]+"px";
},30);
strX=[];
strY=[];
}
var strX=[];
var strY=[];
function recorde(offsetTop,offsetLeft,flag){
var text1=aDiv[1].innerText;
aDiv[0].innerHTML="Drag:"+"<span style='color:yellow'>"+state+"</span>";
aDiv[1].innerHTML="offsetTop:"+"<span style='color:yellow'>"+offsetTop+"</span>";
aDiv[2].innerHTML="offsetLeft:"+"<span style='color:yellow'>"+offsetLeft+"</span>";
strX.push(offsetTop) ;
strY.push(offsetLeft);
// console.log(strX);
// console.log(strY);
return {
strX,
strY
}
}
</script>
</html>
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js实现鼠标拖曳效果
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