css - 如何将文本作为 CSS 内容属性垂直和水平居中？

Question

我想将文本作为 CSS3 内容属性垂直和水平居中。屏幕调整大小居中应该没有问题。

请检查代码:http://jsfiddle.net/epomschar/3pb3swwe/

    <div class="container"></div>

.container {
  position: relative;
  height: 200px;
  width: 200px;
}
.container:after {
  position: absolute;
  content: 'Center me!';
  top: 50%;
  right: 0;
  bottom: 0;
  left: 0;
  text-align: center;
  transform: translateY(-50%);
}
.container:before {
  position: absolute;
  content: '';
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  color: white;
  background-color: yellow;
  border-radius: 50%;
  width: 100%;
  height: 100%;
}

解决方案:http://jsfiddle.net/epomschar/3pb3swwe/7/

Answer 1

只需删除 bottom: 0; 即可得到解决方案。

 
    
    .container {
      position: relative;
      height: 200px;
      width: 200px;
    }
    .container:after {
      position: absolute;
      content: 'Center me!';
      top: 50%;
      right: 0;
      /* bottom: 0; REMOVE THIS LINE */
      left: 0;
      text-align: center;
      transform: translateY(-50%);
    }
    .container:before {
      position: absolute;
      content: '';
      top: 0;
      right: 0;
      bottom: 0;
      left: 0;
      color: white;
      background-color: yellow;
      border-radius: 50%;
      width: 100%;
      height: 100%;
    }

<div class="container"></div>