[Bootstrap 5 学习记录]（一）搭建框架

引入 CSS

在 <head> 标签里引入 CSS 文件，注意要放在其他样式文件前面。

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet external nofollow" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">

引入 JS

在页面的末尾、</body> 标签前面放入JS文件。

<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous"></script>

注：从 Bootstrap 5.x 开始不再使用 jQuery.

页面模板示例

<!doctype html>
<html lang="zh-CN"> 
  <head> 
    <!-- Required meta tags --> 
    <meta charset="utf-8"> 
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <!-- Bootstrap CSS --> 
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet external nofollow" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">

    <title>Hello, world!</title> 
  </head> 
  <body> 
    <h1>Hello, world!</h1>

    <!-- Optional JavaScript; choose one of the two! -->

    <!-- Option 1: Bootstrap Bundle with Popper --> 
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous"></script>

    <!-- Option 2: Separate Popper and Bootstrap JS --> 
    <!--
    <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.10.2/dist/umd/popper.min.js" integrity="sha384-7+zCNj/IqJ95wo16oMtfsKbZ9ccEh31eOz1HGyDuCQ6wgnyJNSYdrPa03rtR1zdB" crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.min.js" integrity="sha384-QJHtvGhmr9XOIpI6YVutG+2QOK9T+ZnN4kzFN1RtK3zEFEIsxhlmWl5/YESvpZ13" crossorigin="anonymous"></script>
    --> 
  </body>
</html>

RTL 从右到左

从 5.x 开始，属性中的 left 、right 被替换 start 、end 。例如：

.ml-3 margin-left 改为 .ms-3
.left-* 、.right-* 改为 .start-* 、 .end-*
.float-left 、 .float-right 改为 .float-start 、.float-end
.pl-* 、.pr-* 改为 .ps-* 、.pe-*