Bootstrap来了!在Bootstrap 3中熟悉的实用程序类。X现在是断点启用。默认的断点是:xs, sm, md, lg和xl，所以这些文本对齐类看起来像.text-[breakpoint]-[align]。

<div class="text-sm-left"></div> //or
<div class="text-md-center"></div> //or
<div class="text-xl-right"></div>

重要:在撰写本文时，Bootstrap 4只在Alpha 2中。这些类及其使用方式如有更改，恕不另行通知。

如果在Bootstrap 4.5中使用text-sm-right似乎不工作，请考虑可能内容对于表来说太多了，并且表不是在容器的100%(例如col)

使桌子100%宽:

 <table class="w-100">

Bootstrap 4有五个类:text left, text center, text right, text justify和text nowrap。

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet"/> <div class="text-left">Left aligned text.</div> <div class="text-center">Center aligned text.</div> <div class="text-right">Right aligned text.</div> <div class="text-justify">Justified text starts here. The quick brown fox jumps over the lazy dog. Justified text ends here.</div> <div class="text-nowrap">No wrap text starts here. The quick brown fox jumps over the lazy dog. No wrap text ends here.</div>

引导3

v3文本对齐文档

<p class="text-left">Left aligned text.</p>
<p class="text-center">Center aligned text.</p>
<p class="text-right">Right aligned text.</p>
<p class="text-justify">Justified text.</p>
<p class="text-nowrap">No wrap text.</p>

---

引导4

v4文本对齐文档

<p class="text-xs-left">Left aligned text on all viewport sizes.</p>
<p class="text-xs-center">Center aligned text on all viewport sizes.</p>
<p class="text-xs-right">Right aligned text on all viewport sizes.</p>

<p class="text-sm-left">Left aligned text on viewports sized SM (small) or wider.</p>
<p class="text-md-left">Left aligned text on viewports sized MD (medium) or wider.</p>
<p class="text-lg-left">Left aligned text on viewports sized LG (large) or wider.</p>
<p class="text-xl-left">Left aligned text on viewports sized XL (extra-large) or wider.</p>

---

引导5

v5文本对齐文档

Text-left已被text-start取代， Text-right已被text-end取代

<p class="text-start">Left aligned text.</p>
<p class="text-center">Center aligned text.</p>
<p class="text-end">Right aligned text.</p>
<p class="text-justify">Justified text.</p>
<p class="text-nowrap">No wrap text.</p>

<p class="text-sm-left">Left aligned text on viewports sized SM (small) or wider.</p>

Left aligned text on viewports sized MD (medium) or wider. Left aligned text on viewports sized LG (large) or wider. Left aligned text on viewports sized XL (extra-large) or wider.

使用BootstrapX使用text-right完美工作:

<td class="text-right">
  text aligned
</td>