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第 70 期(W3C 标准-CSS-布局排版):不定高垂直居中 #73

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@wingmeng

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@wingmeng
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不定高垂直居中对齐,即没有固定高度的子元素在父容器里垂直居中对齐。

.parent {
  width: 300px;
  height: 200px;
  border: 1px solid #ccc;
}

.child {background: #fd0;}
<div class="parent">
  <div class="child">The quick brown fox jumps over the lazy dog.</div>
</div>

解决方案:

/* 方法1 */
.child {
  position: relative;
  top: 50%;
  transform: translateY(-50%);
}
/* 方法2 */
.parent {
  display: flex;
  align-items: center;
}
/* 方法3 */
.parent {
  display: table-cell;
  vertical-align: middle;
}

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