拖拽对话框案例

发表于 | 更新于: | 分类于 | | 热度 ℃

重点

1.点击事件
2.样式的改变
3.鼠标事件
4.client系列运用
5.offset系列

效果图



案例代码

Css

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/* 点击字 */
.top {
    text-align: center;
    font-size: 34px;
    cursor: pointer
}

/* 背景遮罩层 */
.bg {
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0px;
    left: 0px;
    background: #000;
    filter: alpha(opacity=30);
    -moz-opacity: 0.3;
    -khtml-opacity: 0.3;
    opacity: 0.3;
    display: none;
}

/* 登录框 */
.dl {
    width: 500px;
    height: 250px;
    background-color: #fff;
    position: fixed;
    top: 200px;
    left: 50%;
    transform: translateX(-50%);
    display: none;
    z-index: 999;
    text-align: center;
    position: relative;
    padding: 10px;
}
.gb {
    width: 35px;
    line-height: 35px;
    border-radius: 50%;
    border: 1px solid #ccc;
    background-color: #fff;
    position: absolute;
    top: -10px;
    right: -10px;
    cursor: pointer;
}
h3 {
    cursor: move;
    font-weight: normal;
}
.yh input {
    display: inline-block;
    width: 350px;
    height: 35px;
    margin: 10px 0;
}
.yh .txt {
    margin-right: 15px;
}
.hy{
    width: 200px;
    line-height: 35px;
    border: 1px solid #ccc;
    margin: 10px auto;
}

Html

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    <div class="wrap">
        <div class="top">
            点击，弹出登陆框!
        </div>
    </div>

    <!-- 登陆框 -->
    <div class="dl">
        <div class="gb">
            关闭
        </div>
        <h3>会员登陆</h3>
        <div class="yh">
用户名：<input type="text" placeholder="请输入用户名"><br>
登陆密码：<input type="text" placeholder="请输入登陆密码" class="txt">
        </div>
        <div class="hy">
            登陆会员
        </div>
    </div>

    <!-- 遮罩层 -->
    <div class="bg">

    </div>

Js

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window.onload = () => {
  let dj = document.querySelector(".top");
  let bg = document.querySelector(".bg");
  let dl = document.querySelector(".dl");
  let gb = document.querySelector(".gb");
  let h = document.querySelector("h3");

  dj.onclick = e => {
    bg.style.display = "block";
    dl.style.display = "block";
    // window.event.cancelBubble = true;
    e.stopPropagation();
  };

//   document.onclick = () => {
//     bg.style.display = "none";
//     dl.style.display = "none";
//   };

  gb.onclick = () => {
    bg.style.display = "none";
    dl.style.display = "none";
  };

  h.onmousedown = e => {
    //  获取此时可视区域的横坐标
    let spaceX = e.clientX - dl.offsetLeft;
    let spaceY = e.clientY - dl.offsetTop;
    // 移动事件
    document.onmousemove = e => {
      let x = e.clientX - spaceX;
      let y = e.clientY - spaceY;
      dl.style.left = x + "px";
      dl.style.top = y + "px";
    };
  };
  
  document.onmouseup = () => {
    document.onmousemove = null;
  }
};
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