1 概述

前端工程师都有过这样的痛苦经历，如何让 div 元素居中，所以我决定分享这个教程。

2 使用 absolute

2.1 tailwind

<div class="relative">
 <div class="absolute left-1/2 top-1/2 translate-x-[-50%] translate-y-[-50%]"></div>
</div>

2.2 bootstrap

<div class="position-relative">
 <div class="position-absolute top-50 start-50 translate-middle"></div>
</div>

3 使用 flex

3.1 tailwind

<div class="flex justify-center items-center">
 <div class=""></div>
</div>

3.2 bootstrap

<div class="d-flex justify-content-center align-items-center">
 <div class=""></div>
</div>

4 使用 flex + margin

4.1 tailwind

<div class="flex">
 <div class="m-auto"></div>
</div>

4.2 bootstrap

<div class="d-flex">
 <div class="m-auto"></div>
</div>

5 使用 grid

5.1 tailwind

<div class="grid place-items-center">
 <div class=""></div>
</div>

5.2 bootstrap

<div class="d-grid justify-content-center align-items-center">
 <div class=""></div>
</div>

6 使用 grid + margin

6.1 tailwind

<div class="grid">
 <div class="m-auto"></div>
</div>

6.2 bootstrap

<div class="d-grid">
 <div class="m-auto"></div>
</div>