拖拽对话框

最新推荐文章于 2023-11-17 20:18:00 发布

原创最新推荐文章于 2023-11-17 20:18:00 发布 · 227 阅读

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CC 4.0 BY-SA版权

本文介绍如何使用HTML、CSS及JavaScript实现一个可拖动且带遮罩层的登录框弹窗。通过简单的代码示例，展示了登录框的布局结构、样式设置以及交互逻辑。

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html代码

<body>
<div class="login-header"><a id="link" href="javascript:void(0);">点击，弹出登录框</a></div>
<div id="login" class="login">
    <div id="title" class="login-title">登录会员
        <span><a id="closeBtn" href="javascript:void(0);" class="close-login">关闭</a></span></div>
    <div class="login-input-content">
        <div class="login-input">
            <label>用户名：</label>
            <input type="text" placeholder="请输入用户名" name="info[username]" id="username" class="list-input">
        </div>
        <div class="login-input">
            <label>登录密码：</label>
            <input type="password" placeholder="请输入登录密码" name="info[password]" id="password" class="list-input">
        </div>
    </div>
    <div id="loginBtn" class="login-button"><a href="javascript:void(0);" id="login-button-submit">登录会员</a></div>
</div><!--登录框-->
<div id="bg" class="login-bg"></div><!--遮挡层-->
</body>

css代码

<style>
        .login-header {
            width: 100%;
            text-align: center;
            height: 30px;
            font-size: 24px;
            line-height: 30px;
        }

        ul, li, ol, dl, dt, dd, div, p, span, h1, h2, h3, h4, h5, h6, a {
            padding: 0px;
            margin: 0px;
        }

        .login {
            width: 512px;
            position: absolute;
            border: #ebebeb solid 1px;
            height: 280px;
            left: 50%;
            right: 50%;
            background: #ffffff;
            box-shadow: 0px 0px 20px #ddd;
            z-index: 9999;
            margin-left: -250px;
            margin-top: 140px;
            display: none;
        }

        .login-title {
            width: 100%;
            margin: 10px 0px 0px 0px;
            text-align: center;
            line-height: 40px;
            height: 40px;
            font-size: 18px;
            position: relative;
            cursor: move;
            -moz-user-select: none; /*火狐*/
            -webkit-user-select: none; /*webkit浏览器*/
            -ms-user-select: none; /*IE10*/
            -khtml-user-select: none; /*早期浏览器*/
            user-select: none;
        }

        .login-input-content {
            margin-top: 20px;
        }

        .login-button {
            width: 50%;
            margin: 30px auto 0px auto;
            line-height: 40px;
            font-size: 14px;
            border: #ebebeb 1px solid;
            text-align: center;
        }

        .login-bg {
            width: 100%;
            height: 100%;
            position: fixed;
            top: 0px;
            left: 0px;
            background: #000000;
            filter: alpha(opacity=30);
            -moz-opacity: 0.3;
            -khtml-opacity: 0.3;
            opacity: 0.3;
            display: none;
        }

        a {
            text-decoration: none;
            color: #000000;
        }

        .login-button a {
            display: block;
        }

        .login-input input.list-input {
            float: left;
            line-height: 35px;
            height: 35px;
            width: 350px;
            border: #ebebeb 1px solid;
            text-indent: 5px;
        }

        .login-input {
            overflow: hidden;
            margin: 0px 0px 20px 0px;
        }

        .login-input label {
            float: left;
            width: 90px;
            padding-right: 10px;
            text-align: right;
            line-height: 35px;
            height: 35px;
            font-size: 14px;
        }

        .login-title span {
            position: absolute;
            font-size: 12px;
            right: -20px;
            top: -30px;
            background: #ffffff;
            border: #ebebeb solid 1px;
            width: 40px;
            height: 40px;
            border-radius: 20px;
        }


    </style>

js代码

<script>
function my$(id) {
    return document.getElementById(id);
}
    my$("link").onclick = function () {
        my$("login").style.display = "block";
        my$("bg").style.display = "block";
    };
    my$("closeBtn").onclick = function () {
        my$("login").style.display = "none";
        my$("bg").style.display = "none";
    };
    my$("title").onmousedown = function (e) {
        var spaceX = e.clientX - my$("login").offsetLeft;
        var spaceY = e.clientY - my$("login").offsetTop;
        document.onmousemove = function (e) {
            var x = e.clientX - spaceX + 250;
            var y = e.clientY - spaceY - 140;
            my$("login").style.left = x + "px";
            my$("login").style.top = y + "px";
        };
    };

    document.onmouseup=function () {
      document.onmousemove=null;//移除移动事件，即鼠标抬起清空移动事件
    };




//点击超链接弹出登录框,点击页面的任何位置都可以关闭登录框
     my$("link").onclick=function (e) {
       my$("login").style.display="block";
       my$("bg").style.display="block";
       //return false;
       //e.preventDefault();
       //上面的两个是阻止默认事件的
       //下面的两个是阻止事件冒泡的
       //window.event.cancelBubble=true;
       e.stopPropagation();
     };
     document.onclick=function () {
       my$("login").style.display="none";
         my$("bg").style.display="none";
       console.log("隐藏了");
     };