blocks|key|2093329|text|更新：虽然这个答案在2013年初可能是正确的，但它不应该再被使用了。正确的解决方案uses+offsets，如下所示：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2093330|class="mx-auto"|code-block|syntax|javascript|2093331|2093332|至于其他用户的建议，也有本机引导类可用，如：|2093333|class="text-center"
class="pagination-centered"|2093334|感谢@Henning和@trejder|2093335|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/40002430/1729885^0|0|2|15|C|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@$9|10|A|11|B|C]]|D|@$9|12|A|13|1|14]]|E|$]]|$1|F|3|G|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|16|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|17|8|@]|D|@]|E|$]]|$1|N|3|O|5|H|7|18|8|@]|D|@]|E|$I|J]]|$1|P|3|Q|5|6|7|19|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|S|$T|$5|U|V|W|E|$X|Y]]]]

<p><strong>Update</strong>: while this answer was likely correct back in early 2013, it should not be used anymore. The proper solution <a href="https://stackoverflow.com/a/40002430/1729885">uses offsets</a>, like so:</p>
<pre><code>class=&quot;mx-auto&quot;
</code></pre>
<hr />
<p>As for other users suggestion there are also native bootstrap classes available like:</p>
<pre><code>class=&quot;text-center&quot;
class=&quot;pagination-centered&quot;
</code></pre>
<p>thanks to @Henning and @trejder</p>


blocks|key|1680807|text|从Bootstrap+documentation|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1680808|1680809|通过margin将一个元素设置为display:+block并居中。以混入和类的形式提供。|blockquote|style|CODE|1680810|1680811|1680812|<div+class="center-block">...</div>|code-block|syntax|javascript|1680813|entityMap|0|LINK|mutability|MUTABLE|url|http://getbootstrap.com/css/#helper-classes-center^0|1|N|0|0|0|2|6|G|E|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]]|C|$]]|$1|D|3|-4|5|6|7|12|8|@]|9|@]|C|$]]|$1|E|3|F|5|G|7|13|8|@$A|14|B|15|H|I]|$A|16|B|17|H|I]]|9|@]|C|$]]|$1|J|3|-4|5|6|7|18|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|19|8|@]|9|@]|C|$]]|$1|L|3|M|5|N|7|1A|8|@]|9|@]|C|$O|P]]|$1|Q|3|-4|5|6|7|1B|8|@]|9|@]|C|$]]]|R|$S|$5|T|U|V|C|$W|X]]]]

<p>From the <a href="http://getbootstrap.com/css/#helper-classes-center" rel="noreferrer">Bootstrap documentation</a>:</p>

<blockquote>
  <p>Set an element to <code>display: block</code> and center via <code>margin</code>. Available as a mixin and class.</p>
</blockquote>

<pre><code>&lt;div class="center-block"&gt;...&lt;/div&gt;
</code></pre>


blocks|key|37361|text|2018年更新的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|37362|在Bootstrap+4中，居中的方法已更改。|offset|length|style|BOLD|37363|BS4中的水平居中|37364|37365|text-center仍用于居中elements|unordered-list-item|CODE|37366|mx-auto将children|37367|offset-*替换为display:inline+display:flex+center-block或mx-auto可用于居中|37368|的网格列|37369|mx-auto+(自动x轴边距)将居中具有定义宽度的display:block或display:flex元素(%25、vw、px等)。默认情况下，在轴网列上使用，因此也有各种flexbox居中方法。|37370|+Bootstrap+4+Horizontal+Centering|37371|有关BS4中垂直居中的，请参见+https://stackoverflow.com/a/41464397/171456|37372|entityMap|0|LINK|mutability|MUTABLE|url|http://www.codeply.com/go/SOSvvKpLOc|1|https://stackoverflow.com/a/41464397/171456^0|0|1|B|E|3|0|5|4|0|0|0|O|0|B|0|0|G|0|7|0|0|P|Q|C|13|P|0|8|B|E|Q|C|13|C|1G|7|0|0|4|0|0|2P|0|7|Q|D|14|C|1J|1|1L|2|1O|2|0|0|X|0|X|0|0|0|F|G|17|G|17|1|0^^$0|@$1|2|3|4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1B|8|@$D|1C|E|1D|F|G]|$D|1E|E|1F|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|1G|8|@$D|1H|E|1I|F|G]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|1J|8|@]|9|@]|A|$]]|$1|K|3|L|5|M|7|1K|8|@$D|1L|E|1M|F|G]|$D|1N|E|1O|F|N]]|9|@]|A|$]]|$1|O|3|P|5|M|7|1P|8|@$D|1Q|E|1R|F|G]|$D|1S|E|1T|F|N]]|9|@]|A|$]]|$1|Q|3|R|5|M|7|1U|8|@$D|1V|E|1W|F|G]|$D|1X|E|1Y|F|G]|$D|1Z|E|20|F|G]|$D|21|E|22|F|N]|$D|23|E|24|F|N]|$D|25|E|26|F|N]|$D|27|E|28|F|N]|$D|29|E|2A|F|N]]|9|@]|A|$]]|$1|S|3|T|5|6|7|2B|8|@$D|2C|E|2D|F|G]]|9|@]|A|$]]|$1|U|3|V|5|6|7|2E|8|@$D|2F|E|2G|F|G]|$D|2H|E|2I|F|N]|$D|2J|E|2K|F|N]|$D|2L|E|2M|F|N]|$D|2N|E|2O|F|N]|$D|2P|E|2Q|F|N]|$D|2R|E|2S|F|N]]|9|@]|A|$]]|$1|W|3|X|5|6|7|2T|8|@$D|2U|E|2V|F|G]]|9|@$D|2W|E|2X|1|2Y]]|A|$]]|$1|Y|3|Z|5|6|7|2Z|8|@$D|30|E|31|F|G]|$D|32|E|33|F|G]]|9|@$D|34|E|35|1|36]]|A|$]]|$1|10|3|-4|5|6|7|37|8|@]|9|@]|A|$]]]|11|$12|$5|13|14|15|A|$16|17]]|18|$5|13|14|15|A|$16|19]]]]

<p><strong><em>Updated 2018</em></strong></p>

<p>In <strong>Bootstrap 4</strong>, the <strong>centering</strong> methods have changed..</p>

<p><strong>Horizontal Center in BS4</strong></p>

<ul>
<li><code>text-center</code> is still used for <code>display:inline</code> elements</li>
<li><code>mx-auto</code> replaces <code>center-block</code> to center <code>display:flex</code> children</li>
<li><code>offset-*</code> <em>or</em> <code>mx-auto</code> can be used to center grid columns</li>
</ul>

<p><code>mx-auto</code> (auto x-axis margins) will center <code>display:block</code> or <code>display:flex</code> elements that have a <em>defined width</em>, (<code>%</code>, <code>vw</code>, <code>px</code>, etc..). <strong>Flexbox is used by default</strong> on grid columns, so there are also various flexbox centering methods.</p>

<p><a href="http://www.codeply.com/go/SOSvvKpLOc" rel="noreferrer"><strong>Demo</strong> Bootstrap 4 Horizontal Centering</a></p>

<p><strong>For vertical centering in BS4 see</strong> <a href="https://stackoverflow.com/a/41464397/171456">https://stackoverflow.com/a/41464397/171456</a></p>


blocks|key|1072874|text|您可以直接写入css文件，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1072875|​|1072876|.content+{
++position:+absolute;
++top:+50%25;
++left:50%25;
++transform:+translate(-50%25,-50%25);
++}|code-block|syntax|javascript|1072877|<div+class+=+"content"+>
++
+++<p>+some+text+</p>
++</div>|1072878|1072879|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|K|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|M|$]]

<p>You may directly write into your css file like this : </p>

<p><div class="snippet" data-lang="js" data-hide="false">
<div class="snippet-code">
<pre class="snippet-code-css lang-css prettyprint-override"><code>.content {
  position: absolute;
  top: 50%;
  left:50%;
  transform: translate(-50%,-50%);
  }</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class = "content" &gt;
  
   &lt;p&gt; some text &lt;/p&gt;
  &lt;/div&gt;</code></pre>
</div>
</div>
</p>


blocks|key|2093358|text|我用这个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2093359|<style>
++++html,+body+{
++++++++height:+100%25;
++++++++margin:+0;
++++++++padding:+0+0;
++++}

++++.container-fluid+{
++++++++height:+100%25;
++++++++display:+table;
++++++++width:+100%25;
++++++++padding-right:+0;
++++++++padding-left:+0;
++++}

++++.row-fluid+{
++++++++height:+100%25;
++++++++display:+table-cell;
++++++++vertical-align:+middle;
++++++++width:+100%25;
++++}

++++.centering+{
++++++++float:+none;
++++++++margin:+0+auto;
++++}
</style>
<body>
++++<div+class="container-fluid">
++++++++<div+class="row-fluid">
++++++++++++<div+class="offset3+span6+centering">
++++++++++++++++content+here
++++++++++++</div>
++++++++</div>
++++</div>
</body>|code-block|syntax|javascript|2093360|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>i use this </p>

<pre><code>&lt;style&gt;
    html, body {
        height: 100%;
        margin: 0;
        padding: 0 0;
    }

    .container-fluid {
        height: 100%;
        display: table;
        width: 100%;
        padding-right: 0;
        padding-left: 0;
    }

    .row-fluid {
        height: 100%;
        display: table-cell;
        vertical-align: middle;
        width: 100%;
    }

    .centering {
        float: none;
        margin: 0 auto;
    }
&lt;/style&gt;
&lt;body&gt;
    &lt;div class="container-fluid"&gt;
        &lt;div class="row-fluid"&gt;
            &lt;div class="offset3 span6 centering"&gt;
                content here
            &lt;/div&gt;
        &lt;/div&gt;
    &lt;/div&gt;
&lt;/body&gt;
</code></pre>


blocks|key|1680766|text|对于水平居中，你可以这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1680767|.centering{
float:none;
margin:0+auto
}

+<div+class="span8+centering"></div>|code-block|syntax|javascript|1680768|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>for horizontaly centering you can have something like this:</p>

<pre><code>.centering{
float:none;
margin:0 auto
}

 &lt;div class="span8 centering"&gt;&lt;/div&gt;
</code></pre>


blocks|key|2088266|text|我喜欢这个类似问题的解决方案。https://stackoverflow.com/a/25036303/2364401使用bootstraps+text-center类对实际的表数据<td>和表头<th>元素。所以|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2088267|<td+class="text-center">Cell+data</td>|2088268|和|2088269|<th+class="text-center">Header+cell+data</th>|2088270|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/25036303/2364401^0|20|B|2J|4|2Q|4|F|18|0|0|0|12|0|0|0|19|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]|$9|W|A|X|B|C]|$9|Y|A|Z|B|C]]|D|@$9|10|A|11|1|12]]|E|$]]|$1|F|3|G|5|6|7|13|8|@$9|14|A|15|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|16|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|17|8|@$9|18|A|19|B|C]]|D|@]|E|$]]|$1|L|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|M|$N|$5|O|P|Q|E|$R|S]]]]

<p>I like this solution from a similar question. <a href="https://stackoverflow.com/a/25036303/2364401">https://stackoverflow.com/a/25036303/2364401</a> Use bootstraps <code>text-center</code> class on the actual table data <code>&lt;td&gt;</code> and table header <code>&lt;th&gt;</code> elements. So</p>

<p><code>&lt;td class="text-center"&gt;Cell data&lt;/td&gt;</code></p>

<p>and</p>

<p><code>&lt;th class="text-center"&gt;Header cell data&lt;/th&gt;</code></p>


blocks|key|1072577|text|对于bootstrap+4，您可以使用flex|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1072578|<div+class="d-flex+justify-content-center+align-items-center">
++++<button+type="submit"+class="btn+btn-primary">Create</button>
</div>|code-block|syntax|javascript|1072579|来源：bootstrap+4.1|offset|length|1072580|entityMap|0|LINK|mutability|MUTABLE|url|https://getbootstrap.com/docs/4.1/utilities/flex/^0|0|0|3|D|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

<p>With bootstrap 4 you can use flex</p>

<pre><code>&lt;div class="d-flex justify-content-center align-items-center"&gt;
    &lt;button type="submit" class="btn btn-primary"&gt;Create&lt;/button&gt;
&lt;/div&gt;
</code></pre>

<p>source: <a href="https://getbootstrap.com/docs/4.1/utilities/flex/" rel="noreferrer">bootstrap 4.1</a></p>


blocks|key|37476|text|bootstrap+4%2B+Flex解决了这个问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|37477|您可以使用|37478|​|37479|<div+class="d-flex+justify-content-center+align-items-center">
++++<button+type="submit"+class="btn+btn-primary">Create</button>
</div>|code-block|syntax|javascript|37480|37481|它应该水平和垂直居中。|37482|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|S|8|@]|9|@]|A|$I|J]]|$1|K|3|E|5|6|7|T|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|U|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|O|$]]

<p>bootstrap 4 + Flex solve this </p>

<p>you can use </p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="d-flex justify-content-center align-items-center"&gt;
    &lt;button type="submit" class="btn btn-primary"&gt;Create&lt;/button&gt;
&lt;/div&gt;</code></pre>
</div>
</div>
</p>

<p>it should center centent horizontaly and verticaly </p>


blocks|key|1681009|text|我在Bootstrap+4中发现你可以这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1681010|居中水平确实是text-center类|offset|length|style|BOLD|CODE|1681011|但是，使用bootstrap类的中心垂直会同时添加两个mb-auto+mt-auto，以便将顶部和底部的边距设置为auto。|1681012|entityMap^0|0|0|4|7|B|0|G|4|R|F|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@$D|O|E|P|F|G]|$D|Q|E|R|F|H]]|9|@]|A|$]]|$1|I|3|J|5|6|7|S|8|@$D|T|E|U|F|G]|$D|V|E|W|F|H]]|9|@]|A|$]]|$1|K|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|L|$]]

<p>I discovered in Bootstrap 4 you can do this:</p>

<p><strong>center horizontal</strong> is indeed <code>text-center</code> class</p>

<p><strong>center vertical</strong> however using bootstrap classes is adding both <code>mb-auto mt-auto</code> so that margin-top and margin bottom are set to auto.</p>


blocks|key|1681043|text|对于少数几个项目的bootstrap4垂直中心|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1681044|用于flex规则的d-flex|style|BOLD|1681045|用于项目垂直方向的flex-column|1681046|用于居中的justify-content-center|1681047|style='height:+300px;'必须有中心位置的设置点，或使用h-100类|1681048|<div+class="d-flex+flex-column+justify-content-center+bg-secondary"+style="
++++height:+300px;
">
++++<div+class="p-2+bg-primary">Flex+item</div>
++++<div+class="p-2+bg-primary">Flex+item</div>
++++<div+class="p-2+bg-primary">Flex+item</div>
++</div>+|code-block|syntax|javascript|1681049|entityMap|0|LINK|mutability|MUTABLE|url|https://getbootstrap.com/docs/4.3/utilities/flex/#justify-content^0|9|A|0|0|9|6|0|9|B|0|5|M|0|0|M|11|5|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|D|3|E|5|6|7|14|8|@$A|15|B|16|F|G]]|9|@]|C|$]]|$1|H|3|I|5|6|7|17|8|@$A|18|B|19|F|G]]|9|@]|C|$]]|$1|J|3|K|5|6|7|1A|8|@$A|1B|B|1C|F|G]]|9|@]|C|$]]|$1|L|3|M|5|6|7|1D|8|@$A|1E|B|1F|F|G]|$A|1G|B|1H|F|G]]|9|@]|C|$]]|$1|N|3|O|5|P|7|1I|8|@]|9|@]|C|$Q|R]]|$1|S|3|-4|5|6|7|1J|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]]]

<p>for <a href="https://getbootstrap.com/docs/4.3/utilities/flex/#justify-content" rel="nofollow noreferrer">bootstrap4</a> vertical center of few items</p>

<p><strong>d-flex</strong> for flex rules</p>

<p><strong>flex-column</strong> for vertical direction on items</p>

<p><strong>justify-content-center</strong> for centering</p>

<p><strong>style='height: 300px;'</strong> must have for set points where center be calc or use <strong>h-100</strong> class</p>

<pre><code>&lt;div class="d-flex flex-column justify-content-center bg-secondary" style="
    height: 300px;
"&gt;
    &lt;div class="p-2 bg-primary"&gt;Flex item&lt;/div&gt;
    &lt;div class="p-2 bg-primary"&gt;Flex item&lt;/div&gt;
    &lt;div class="p-2 bg-primary"&gt;Flex item&lt;/div&gt;
  &lt;/div&gt; 
</code></pre>


<p>is there any way to center html elements vertically or horizontally inside the main parents?</p>


Twitter Bootstrap - how to center elements horizontally or vertically

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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社区新版编辑器体验调研

有没有办法让html元素在主父元素中垂直或水平居中？

问Twitter Bootstrap -如何水平或垂直居中元素
EN

回答 11

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

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问Twitter Bootstrap -如何水平或垂直居中元素EN

回答 11

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

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活动

圈层

关于

腾讯云开发者

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问Twitter Bootstrap -如何水平或垂直居中元素
EN