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拖动弹出框

2024-10-17 21:58:39   213人阅读

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>拖动弹出框</title>
    <style>
        .top_box{
            font-weight:bold;">#6796cc;
            height:30px;
            line-height: 30px;
            color: #fff;
            padding-left: 20px;
        }
        .b_box{
            width: 300px;
            height:300px;
            box-shadow: 2px 1px 4px #000;
        }
        .drag{
            width: 100%;
            height: 30px;
            line-height: 30px;
            font-weight:bold;">#06b8cc;
            color: #fff;
            cursor: move;
        }
        .b_box{
            display: none;
            position:absolute;
            margin: 100px;
        }
        a{
            text-decoration: none;
            color: #fff;
        }
    </style>
</head>
<body>
<div class="top_box"><a href="javascript:;" id="register">注册信息</a> </div>
<div class="b_box" id="b_box">
    <div class="drag" id="drag"> 注册信息（可以拖拽）
        <span>关闭</span>
    </div>
</div>
</body>
<script>
    var register = document.getElementById("register");
    var b_box = document.getElementById("b_box");
    register.onclick = function(){
        b_box.style.display = "block"
    }
    //鼠标按下移动时，先计算出b_box起始位置到屏幕的距离
  var drag = document.getElementById("drag");
    drag.onmousedown = function(event){
        var event = event || window.event;
        var x = event.clientX - b_box.offsetLeft + 100;
        var y = event.clientY - b_box.offsetTop +100 ;
        document.onmousemove = function(event){
            var event = event || window.event;
            b_box.style.left = event.clientX - x +"px";
            b_box.style.top = event.clientY - y +"px";
            // 防止拖动过程中选择文字
            window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();
        }
        //鼠标弹起之后 结束操作
        document.onmouseup = function(){
            document.onmousemove = null;
        }
    }

</script>
</html>

拖动弹出框


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