1、鼠标按住拖动效果
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
#div1{
width: 100px;
height: 100px;
background-color: #5F9EA0;
position: absolute;
left: 0px;
top: 0px;
}
</style>
</head>
<body>
<div id="div1"></div>
<script type="text/javascript">
var div1 = document.getElementById("div1");
var originalX = 0;
var originalY = 0;
var flag = false;
div1.addEventListener("mousedown",function(evt){
originalX = evt.clientX - div1.offsetLeft; //记录事件发生的鼠标到left的距离
originalY = evt.clientY - div1.offsetTop;
flag = true;
});
div1.addEventListener("mousemove",function(evt){
if (flag){
div1.style.left = (evt.clientX - originalX)+"px";
div1.style.top = (evt.clientY - originalY)+"px";
}
});
div1.addEventListener("mouseup",function(evt){
flag = false;
});
</script>
</body>
</html>
效果：
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