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js code to implement mouse dragging div instance

小云云Original: 2018-02-28 09:40:561678browse

This article mainly shares with you the js code to implement mouse dragging div examples, hoping to help everyone.

Directly upload the code, simple and practical.

<!DOCTYPE HTML><html><head><meta charset="utf-8"><title></title> <script type="text/javascript" src=&#39;./js/jquery-1.8.3.min.js&#39;></script> <style type="text/css">#ptest{    width: 200px;    height: 200px;    background: red;    position: absolute;/*这很关键*/
    left: 40%;    top:37%;}#ptest:active{    cursor: move;}</style></head><body><p id="ptest">来，拖拽我啊～</p><script type="text/javascript">var opTest = document.getElementById("ptest");
darg(opTest);function darg(obj){
    //鼠标按下 
    obj.onmousedown = function(ev){

       //IE直接用event或者window.event得到事件本身,而在其他浏览器函数要获取到事件本身需要从函数中传入
    　　var oevent = ev || event;

    　　var distanceX = oevent.clientX - this.offsetLeft;
    　　var distanceY = oevent.clientY - this.offsetTop;        //鼠标移动
    　　document.onmousemove = function(ev){
    　　　　var oevent = ev || event;
    　　　　obj.style.left = oevent.clientX - distanceX + &#39;px&#39;;
    　　　　obj.style.top = oevent.clientY - distanceY + &#39;px&#39;; 
    　　};        //鼠标放开
    　　document.onmouseup = function(){
    　　　　document.onmousemove = null;
    　　　　document.onmouseup = null;
    　　};
    };  
}</script></body></html>

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