JS应用：模拟弹出层拖动效果

作者：Terry2022.07.04来源：Web前端之家浏览：3584评论:0

关键词：js

JS应用：模拟弹出层拖动效果。看代码吧。

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>拖动模态框</title>
    <style>
        body {
            padding: 0;
            margin: 0;
        }
        .login {
            display: none;
            position: fixed;
            top: 50%;
            left:50%;
            box-sizing:border-box;
            width:400px;
            height: 200px;
            background-color: pink;
            box-shadow: 0px 0px 20px #ddd;
            z-index: 9999;
            transform: translate(-50%, -50%);
            /* 让一个固定定位的盒子 垂直居中 */
 
        
        }
        h4 {
            text-align: center;
            line-height: 70px;
        }
        form {
            text-align: center;
            margin-left: 40px;
        }
        a {
            text-decoration: none;
            text-align: center;
        }
        .finish {
            position: absolute;
            top:-15px;
            right:-15px;
            width: 30px;
            height: 30px;
            border: 1px solid white;
            border-radius: 50%;
            background-color: white;
            font-size: 10px;
            line-height: 30px;
        }
        .login-bg {
            display: none;
            width: 100%;
            height: 100%;
            position: fixed;
            top:0px;
            left: 0px;
            background-color: rgba(0,0,0,0.3);
        }
        .title {
            width: 400px;
            height: 50px;
            cursor: move;
            margin-top: -20px;
            height: 70px;
         
        }
    </style>
</head>
<body>
    <div class="bg">
        <div class="link"><a href="javascript:;" >点击，弹出登录框</a></div>
        <div class="login">
            <div class="finish">关闭</div>
            <div class = "title"><h4>登录会员</h4></div>
            <form action="">
                <table>
                    <tr>
                        <td>用户名：</td>
                        <td><input type="text" name="" id="" value="请输入用户名"></td>
                    </tr>
                    <tr>
                        <td>登录密码：</td>
                        <td><input type="text" name="" id="" value="请输入密码"></td>
                    </tr>
                </table>
                <input type="submit" name="" id="" value="登录会员">
            </form>
        </div>
    </div>
    <!-- 遮盖层 -->
    <div id="bg" class="login-bg"></div>
    <script>
        var a = document.querySelector('a');
        var login = document.querySelector('.login');
        var mask = document.querySelector('.login-bg');
        var finish = document.querySelector('.finish');
        a.addEventListener('click',function() {
            login.style.display = 'block';
            mask.style.display = 'block';
        });
        finish.addEventListener('click', function(){
            login.style.display = 'none';
            mask.style.display = 'none';
        })
        var title = document.querySelector('.title');
        title.addEventListener('mousedown', function(e){
            var x = e.pageX - login.offsetLeft;
            var y = e.pageY - login.offsetTop;
            // 鼠标移动的时候，把鼠标在页面中的坐标，减去 鼠标在盒子内的坐标就是模态框的left和top值。
            document.addEventListener('mousemove', move)
            function move(e) {
                // 别忘了加单位。
                login.style.left = e.pageX - x + 'px';
                login.style.top = e.pageY - y + 'px';
            }
            // 鼠标弹起，让鼠标移动事件停止。
            document.addEventListener('mouseup', function() {
                document.removeEventListener('mousemove', move);
            })
        })
    </script>
</body>
</html>

赏您的支持是我们创作的动力！