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---
layout: single
property_name: align-items
---
<section id="align-items" class="property">
<header class="property-header">
<nav class="property-links"><a class="property-collection" href="{{site.url}}/flexbox/">章节: <strong>flexbox</strong> </a><a class="property-links-direct" href="{{site.url}}/property/align-items/" data-property-name="align-items" data-tooltip="查看该页面的固定链接">固定链接</a> <a class="property-share" data-tooltip="分享给其他好友" data-property-name="align-content">分享</a> <a target="_blank" href="http://caniuse.com/#feat=flexbox" data-tooltip="使用 Can I Use 检查特性支持情况" rel="external">检查特性支持情况</a> <a
target="_blank" href="https://developer.mozilla.org/en/docs/Web/CSS/align-items" data-tooltip="Mozilla Developer Network" rel="external">MDN</a></nav>
<h2 class="property-name"><a href="#align-items"><span>#</span>align-items</a></h2>
<div class="property-description">
<p>定义了在 flexbox 容器的一行内，子元素在<strong>纵向</strong>轴的对齐方式。</p>
</div>
</header>
<style type="text/css">
.align-items {
background: hsl(0, 0%, 95%);
display: flex;
height: 200px;
justify-content: center;
padding: 0;
}
</style>
<style type="text/css">
.align-items .square {
height: 50px;
margin: 0 2px;
width: calc(20% - 4px);
}
.align-items .square:nth-child(2) {
height: 100px;
}
.align-items .square:nth-child(4) {
height: 75px;
}
.align-items .line {
left: 2px;
position: absolute;
right: 2px;
}
</style>
<section class="example">
<header class="example-header">
<p class="example-name"><code class="example-value" data-tooltip="点击复制" data-clipboard-text="align-items: flex-start;">align-items: flex-start;</code></p>
<div class="example-description">
<p>flexbox 的子元素按照<strong>纵向轴</strong>的<strong>起始处</strong>对齐。</p>
<p>默认，纵向轴是垂直的，所以这就意味着 flexbox 的子元素对齐于<em>垂直</em>方向的<em>顶部</em>。</p>
</div>
</header>
<aside class="example-preview">
<div class="example-browser"><i></i><i></i><i></i></div>
<div class="example-output">
<div class="example-output-div align-items" id="align-items-flex-start">
<p class="square square--plum">1</p>
<p class="square square--plum">2</p>
<p class="square square--plum">3</p>
<p class="square square--plum">4</p>
<p class="square square--plum">5</p>
<div class="line line--red"></div>
</div>
</div>
</aside>
<style type="text/css">
#align-items-flex-start {
align-items: flex-start;
}
</style>
<style type="text/css">
#align-items-flex-start .line {
top: 0;
}
</style>
</section>
<section class="example">
<header class="example-header">
<p class="example-name"><code class="example-value" data-tooltip="点击复制" data-clipboard-text="align-items: flex-end;">align-items: flex-end;</code></p>
<div class="example-description">
<p>flexbox 的子元素按照<strong>纵向轴</strong>的<strong>末尾处</strong>对齐。</p>
<p>默认，纵向轴是垂直的，所以这就意味着 flexbox 的子元素对齐于<em>垂直</em>方向的<em>底部</em>。</p>
</div>
</header>
<aside class="example-preview">
<div class="example-browser"><i></i><i></i><i></i></div>
<div class="example-output">
<div class="example-output-div align-items" id="align-items-flex-end">
<p class="square square--plum">1</p>
<p class="square square--plum">2</p>
<p class="square square--plum">3</p>
<p class="square square--plum">4</p>
<p class="square square--plum">5</p>
<div class="line line--red"></div>
</div>
</div>
</aside>
<style type="text/css">
#align-items-flex-end {
align-items: flex-end;
}
</style>
<style type="text/css">
#align-items-flex-end .line {
bottom: 0;
}
</style>
</section>
<section class="example">
<header class="example-header">
<p class="example-name"><code class="example-value" data-tooltip="点击复制" data-clipboard-text="align-items: center;">align-items: center;</code></p>
<div class="example-description">
<p>flexbox 的子元素按照<strong>纵向轴</strong>的<strong>中间</strong>对齐。</p>
<p>默认，纵向轴是垂直的，所以这就意味着 flexbox 的子元素对齐于<em>垂直</em>方向的<em>中间</em>。</p>
</div>
</header>
<aside class="example-preview">
<div class="example-browser"><i></i><i></i><i></i></div>
<div class="example-output">
<div class="example-output-div align-items" id="align-items-center">
<p class="square square--plum">1</p>
<p class="square square--plum">2</p>
<p class="square square--plum">3</p>
<p class="square square--plum">4</p>
<p class="square square--plum">5</p>
<div class="line line--red"></div>
</div>
</div>
</aside>
<style type="text/css">
#align-items-center {
align-items: center;
}
</style>
<style type="text/css">
#align-items-center .line {
top: 50%;
}
</style>
</section>
<section class="example">
<header class="example-header">
<p class="example-name"><code class="example-value" data-tooltip="点击复制" data-clipboard-text="align-items: baseline;">align-items: baseline;</code></p>
<div class="example-description">
<p>flexbox 的子元素按照<strong>纵向轴</strong>的<strong> baseline </strong>对齐。</p>
<p>默认，纵向轴是垂直的，所以这就意味着 flexbox 的子元素对齐于以自身<em>文字</em>为横向水平线的<em>baseline</em>。</p>
</div>
</header>
<aside class="example-preview">
<div class="example-browser"><i></i><i></i><i></i></div>
<div class="example-output">
<div class="example-output-div align-items" id="align-items-baseline">
<p class="square square--plum">1</p>
<p class="square square--plum">2</p>
<p class="square square--plum">3</p>
<p class="square square--plum">4</p>
<p class="square square--plum">5</p>
<div class="line line--red"></div>
</div>
</div>
</aside>
<style type="text/css">
#align-items-baseline {
align-items: baseline;
}
</style>
<style type="text/css">
#align-items-baseline .line {
top: 55px;
}
</style>
</section>
<section class="example">
<header class="example-header">
<p class="example-name"><code class="example-value" data-tooltip="点击复制" data-clipboard-text="align-items: stretch;">align-items: stretch;</code></p>
<div class="example-description">
<p>flexbox 的子元素将拉伸覆盖整个<strong>纵向轴</strong>。</p>
<p>默认，纵向轴是垂直的，所以这就意味着 flexbox 的子元素将填满整个纵向的空间。</p>
</div>
</header>
<aside class="example-preview">
<div class="example-browser"><i></i><i></i><i></i></div>
<div class="example-output">
<div class="example-output-div align-items" id="align-items-stretch">
<p class="square square--plum">1</p>
<p class="square square--plum">2</p>
<p class="square square--plum">3</p>
<p class="square square--plum">4</p>
<p class="square square--plum">5</p>
<div class="line line--red"></div>
</div>
</div>
</aside>
<style type="text/css">
#align-items-stretch {
align-items: stretch;
}
</style>
<style type="text/css">
#align-items-stretch .square {
height: auto;
}
#align-items-stretch .square:nth-child(2) {
height: auto;
}
#align-items-stretch .square:nth-child(4) {
height: auto;
}
#align-items-stretch .line {
display: none;
}
</style>
</section>
</section>