【问题标题】:HTML button on click show overlay layer单击显示覆盖层上的 HTML 按钮
【发布时间】:2017-12-24 12:33:44
【问题描述】:

我试图在单击按钮时显示整个页面的叠加层。我打算在内容 div 中添加一个 iframe 以供弹出。这是我的 HTML:

以及用于显示和隐藏叠加层的 CSS:

.box {
  width: 20%;
  margin: 0 auto;
  background: rgba(255,255,255,0.2);
  padding: 35px;
  border: 2px solid #fff;
  border-radius: 20px/50px;
  background-clip: padding-box;
  text-align: center;
}

.button {
  font-size: 1em;
  padding: 10px;
  color: #fff;
  border: 2px solid blue;
  border-radius: 20px/50px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease-out;
}
.button:hover {
  background: blue;
}

.overlay {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.7);
  transition: opacity 500ms;
  visibility: hidden;
  opacity: 0;
}
.overlay:target {
  visibility: visible;
  opacity: 1;
}

.popup {
  margin: 70px auto;
  padding: 20px;
  background: #fff;
  border-radius: 5px;
  width: 30%;
  position: relative;
  transition: all 5s ease-in-out;
}

.popup h2 {
  margin-top: 0;
  color: #333;
  font-family: Tahoma, Arial, sans-serif;
}
.popup .close {
  position: absolute;
  top: 20px;
  right: 30px;
  transition: all 200ms;
  font-size: 30px;
  font-weight: bold;
  text-decoration: none;
  color: #333;
}
.popup .close:hover {
  color: orange;
}
.popup .content {
  max-height: 30%;
  overflow: auto;
}
<div style="height: 1200px;">


<div class="box">
	<a class="button" href="#popup1">Show Overlay</a>
</div>

<div id="popup1" class="overlay">
	<div class="popup">
		<h2>Title</h2>
		<a class="close" href="#">×</a>
		<div class="content">
			Content
		</div>
	</div>
</div>

</div>

我的jsfiddle

但是,样式有一个小问题。向下滚动时,覆盖不覆盖下面的部分。它仅涵盖开始向下滚动之前的部分。我尝试将高度设置为 100%,但没有任何用处。

任何想法如何解决这个问题?

谢谢!

【问题讨论】:

    标签: html css


    【解决方案1】:

    使用position: fixed; 代替position: absolute;。 position absolute 根据窗口高度而不是 body 设置自动高度。

    .box {
      width: 20%;
      margin: 0 auto;
      background: rgba(255, 255, 255, 0.2);
      padding: 35px;
      border: 2px solid #fff;
      border-radius: 20px/50px;
      background-clip: padding-box;
      text-align: center;
    }
    
    .button {
      font-size: 1em;
      padding: 10px;
      color: #fff;
      border: 2px solid blue;
      border-radius: 20px/50px;
      text-decoration: none;
      cursor: pointer;
      transition: all 0.3s ease-out;
    }
    
    .button:hover {
      background: blue;
    }
    
    .overlay {
      position: fixed;
      top: 0;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(0, 0, 0, 0.7);
      transition: opacity 500ms;
      visibility: hidden;
      opacity: 0;
    }
    
    .overlay:target {
      visibility: visible;
      opacity: 1;
    }
    
    .popup {
      margin: 70px auto;
      padding: 20px;
      background: #fff;
      border-radius: 5px;
      width: 30%;
      position: relative;
      transition: all 5s ease-in-out;
    }
    
    .popup h2 {
      margin-top: 0;
      color: #333;
      font-family: Tahoma, Arial, sans-serif;
    }
    
    .popup .close {
      position: absolute;
      top: 20px;
      right: 30px;
      transition: all 200ms;
      font-size: 30px;
      font-weight: bold;
      text-decoration: none;
      color: #333;
    }
    
    .popup .close:hover {
      color: orange;
    }
    
    .popup .content {
      max-height: 30%;
      overflow: auto;
    }
    <div style="height: 1200px;">
    
    
      <div class="box">
        <a class="button" href="#popup1">Show Overlay</a>
      </div>
    
      <div id="popup1" class="overlay">
        <div class="popup">
          <h2>Title</h2>
          <a class="close" href="#">×</a>
          <div class="content">
            Content
          </div>
        </div>
      </div>
    
    </div>

    【讨论】:

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