div垂直居中于div中

除了table话之后用vertical-align: middle;属性外,另外添加一种新方法.

<div class="wrapper">
  <div class="half-column" data-bg="red"></div>
  <div class="half-column" data-bg="blue"></div>
  <div class="vertical-center"></div>
</div>

　　

.wrapper {
  margin: 0 auto;
  width: 600px;
  height: 400px;
}

.half-column {
  float: left;
  width: 50%;
  height: 100%;
  
  @each $color in red, blue {
    &[data-bg=#{$color}] {
      background-color: $color;
    }
  }
}

.vertical-center {
  position: relative;
  top: 50%;
  transform: translateY(-50%);
  margin: 0 auto;
  width: 200px;
  height: 200px;
  background-color: #ccc;
}

感谢作者nightire