js方块拖拽 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        body{
            margin: 0;
        }
        #div1{
            width: 100px;
            height: 100px;
            background: red;
            position: absolute;
            left: 0;
        top: 0;
        }
    </style>
</head>
<body>
<div id="div1"></div>

</body>
</html>
<script>
    var div1 = document.getElementById("div1");
    div1.onmousedown = function (event) {
        var chaX = event.clientX - div1.offsetLeft;
        var chaY = event.clientY - div1.offsetTop;
        document.onmousemove = function (event) {
            div1.style.left = event.clientX - chaX + 'px';
            div1.style.top = event.clientY - chaY + 'px';
            let ev = event || window.event
        }
        document.onmouseup = function () {
            document.onmousemove = null
        }
    }

</script>
   获得按钮元素
    var div1 = document.getElementById("div1");
给按钮增加点击事件。
div1.onmousedown = function (event)
posted @ 2021-12-08 18:27  clearlove3  阅读(46)  评论(0)    收藏  举报