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JavaScript實現彈出式可拖動登入框

本文例項為大家分享了實現彈出式可拖動登入框的具體程式碼,供大家參考,具體內容如下

效果圖展示:

JavaScript實現彈出式可拖動登入框

總體來說實現起來比較簡單,老規矩,先搭建html框架,程式碼如下:

<div class="login-header"><a id="link" href="script:;" rel="external nofollow" >點選,彈出登入框</a></div>
  <div id="login" class="login">
    <div id="title" class="login-title">登入會員
      <span><a id="closeBtn" href="javascript:void(0);" rel="external nofollow"  rel="external nofollow"  class="close-login">關閉</a></span>
    </div>
    <div class="login-input-content">
      <div class="login-input">
        <label>使用者名稱:</label>
        <input type="text" placeholder="請輸入使用者名稱" name="info[username]" id="username" class="list-input">
      </div>
      <div class="login-input">
        <label>登入密碼:</label>www.cppcns.com
; <input type="password" placeholder="請輸入登入密碼" name="info[password]" id="password" class="list-input"> </div> </div> <div id="loginBtn" class="login-button"><a href="javascript:void(0);" rel="external nofollow" rel="external nofollow" id="login-button-submit">登入會員</a></div> </div> <!-- 遮蓋層 --> <div id="bg" class="login-bg"></div>

程式碼:

<style>
    .login-header {
      width: 100%;
      text-align: center;
      height: 30px;
      font-size: 24px;
      line-height: 30px;
    }
   
    *{
      padding: 0px;
      margin: 0px;
    }
   
    .login {
      display: none;
      width: 512px;
      height: 280px;
      position: fixed;
    http://www.cppcns.com
border: #ebebeb solid 1px; left: 50%; top: 50%; background: #ffffff; box-shadow: 0px 0px 20px #ddd; z-index: 9999; 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; } .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 { display: none; width: 100%; height: 100%; position: fixed; top: 0px; left: 0px; background: rgba(0,.3); } a { text-decoration: none; color: #000000; } .login-button a { display: block; xlGpkMYksW } .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: xlGpkMYksW35px; 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>

有沒有覺得CSS才是最複雜難搞的

最後是程式碼:這裡我們只讓盒子的title部分能拖動,也就是登入框頭部部分

<script>
    //獲取元素
    var login = document.querySelector('.login');
    var mask = document.querySelector('.login-bg');
    var link = document.querySelector('#link');
    var closeBtn = document.querySelector('#closeBtn');
    var title = document.querySelector('#title');
    //建立點選事件,點選link後,登入框顯示
    link.addEventListener('click',function() {
      mask.style.display = 'block';
      login.style.display = 'block';
    })
    //關閉後,登入框隱藏
    closeBtn.addEventListener('click',function() {
      mask.style.display = 'none';
      login.style.display = 'none';
    })
    //滑鼠按下,獲取登入框位置
    title.addEventListener('mousedown',function(e) {
      var x = e.pageX - login.offsetLeft;
      var y = e.pageY - login.offsetTop;
      //滑鼠移動,觸發移動事件
      document.addEventListener('mousemove',move)

      function move(e) {
        login.style.left = e.pageX - x + 'px';
        login.style.top = e.pageY - y + 'px';
      }
      //滑鼠抬起,銷燬滑鼠移動事件
      document.addEventListener('mouseup',function() {
        document.removeEventListener('mousemove',move);
      })
    })
</scrip>

這樣就實現了簡單的彈出式可移動登入框。快上手練練吧

以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支援我們。