原生JS实现具有遮罩效果的登录窗口

﹏ヽ暗。殇╰゛Y 2024-04-28 13:10 67阅读 0赞

1、点击文本，可以弹出登录窗口，提供页面遮罩层；

2、按住鼠标按键，可以自由拖拽窗口的位置；

3、点击关闭按钮，可以关闭登录窗口；

![watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5oiR5piv5rOi5ZOp5Liq5rOi_size_20_color_FFFFFF_t_70_g_se_x_16][]

<!DOCTYPE html>
    <html>
    
    <head lang="en">
      <meta charset="UTF-8">
      <title></title>
      <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;
          height: 280px;
          position: absolute;
          border: #ebebeb solid 1px;
          left: 50%;
          top: 50%;
          background: #ffffff;
          box-shadow: 0px 0px 20px #ddd;
          z-index: 9999;
          display: none;
          transform: translate(-50%, -50%);
        }
    
        .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>
    </head>
    
    <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>
      
      <div id="bg" class="login-bg"></div>
      <script>
        // 显示登录框和遮盖层
        var login = document.getElementById('login');
        var bg = document.getElementById('bg');
        //1 点击按钮，弹出登录框和遮盖层
        var link = document.getElementById('link');
        link.onclick = function () {
          login.style.display = 'block';
          bg.style.display = 'block';
          return false;
        }
    
        // 2 点击关闭按钮，隐藏 登录框和遮盖层
        var closeBtn = document.getElementById('closeBtn');
        closeBtn.onclick = function () {
          // 隐藏 登录框和遮盖层
          login.style.display = 'none';
          bg.style.display = 'none';
        }
    
        // 3 拖拽
        var title = document.getElementById('title');
        title.onmousedown = function (e) {
          // 鼠标按下，求鼠标在盒子中的位置
          var x = e.pageX - login.offsetLeft;
          var y = e.pageY - login.offsetTop;
    
          document.onmousemove = function (e) {
            // 鼠标移动的时候， 盒子的坐标
            var loginX = e.pageX - x;
            var loginY = e.pageY - y;
    
            login.style.left = loginX + 'px';
            login.style.top = loginY + 'px';
          }
        }
    
        document.onmouseup = function () {
          // 移除鼠标移动的事件
          document.onmousemove = null;
        }
      </script>
    </body>
    
    </html>

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