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  • 纯js实现积木(div)拖动效果

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>拖动</title>
        <style type="text/css">
        </style>
    </head>
    <body id="content">
    <input type="button" value="获取积木" id="div3"/>
    </body>
    <script>
        //生成积木
        document.getElementById("div3").onclick=function(){
            var num = getnumber();
            var num1 = getnumber();
            var num2 = getnumber();
            var num3 = getnumber();
            var divs = '<div id="s'+num+'"style=" 200px;height: 200px;position: absolute;background:rgb('+num1+','+num2+','+num3+')"></div>'
            document.getElementById("content").insertAdjacentHTML("beforeEnd",divs);
            darg1("s"+num+"");
        };
        //h获取随机数,获取随机颜色
        function getnumber(){
            return parseInt(Math.random()*255);
        }
        //拖动积木
        function darg1(id){
            var obj = document.getElementById(id);
            var objx = 0;
            var objy = 0;
            obj.onmousedown = function(even){
                //鼠标到div的距离
                objx = even.clientX - obj.offsetLeft;
                objy = even.clientY - obj.offsetTop;
                //div移动的距离 = 鼠标到父窗口的距离 - 鼠标到div的距离
                document.onmousemove = function(even){
                    obj.style.left = even.pageX-objx+'px';
                    obj.style.top = even.pageY-objy+'px';
                };
                document.onmouseup = function(){
                    document.onmousemove = null;
                    document.onmouseup = null;
                };
            };
            return  false;
        }
    
    </script>
    <html>

    点击button按钮,获取积木,获取积木后可以在浏览器内随意拖动生成的积木:

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  • 原文地址:https://www.cnblogs.com/caozong/p/5767717.html
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