Bootstrap的“spinners”可用于显示项目中的加载状态。它们只使用HTML和CSS构建，这意味着您不需要任何JavaScript来创建它们。但是，您需要一些自定义JavaScript来切换它们的可见性。它们的外观、对齐和大小可以通过我们令人惊叹的实用程序类轻松定制。

为了便于访问，这里的每个加载程序都包括 role=“status" 和嵌套的 <span class="visually-hidden">加载中...</span>。

<div class="spinner-border" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>

颜色

你可以使用 .text-primary 等这样的文本颜色来定义加载动画的颜色。

<div class="spinner-border text-primary" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-border text-secondary" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-border text-success" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-border text-danger" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-border text-warning" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-border text-info" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-border text-light" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-border text-dark" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>

渐变增长式的加载

<div class="spinner-grow" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>

颜色

<div class="spinner-grow text-primary" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-grow text-secondary" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-grow text-success" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-grow text-danger" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-grow text-warning" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-grow text-info" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-grow text-light" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-grow text-dark" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>

对齐

外边距

使用类似于 .m-5 这样的 margin 工具。

<div class="spinner-border m-5" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>

布局

Flex

<div class="d-flex justify-content-center">
        <div class="spinner-border" role="status">
          <span class="visually-hidden">加载中...</span>
        </div>
      </div>

<div class="d-flex align-items-center">
        <strong>加载中...</strong>
        <div class="spinner-border ms-auto" role="status" aria-hidden="true"></div>
      </div>

Floats

<div class="clearfix">
        <div class="spinner-border float-end" role="status">
          <span class="visually-hidden">加载中...</span>
        </div>
      </div>

Text align

<div class="text-center">
        <div class="spinner-border" role="status">
          <span class="visually-hidden">加载中...</span>
        </div>
      </div>

大小

<div class="spinner-border spinner-border-sm" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-grow spinner-grow-sm" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>

或者，使用自定义CSS或内联样式根据需要更改维度。

<div class="spinner-border" style="width: 3rem; height: 3rem;" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>
      <div class="spinner-grow" style="width: 3rem; height: 3rem;" role="status">
        <span class="visually-hidden">加载中...</span>
      </div>

按钮

<button class="btn btn-primary" type="button" disabled>
        <span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span>
        <span class="visually-hidden">加载中...</span>
      </button>
      <button class="btn btn-primary" type="button" disabled>
        <span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span>
        加载中...
      </button>

<button class="btn btn-primary" type="button" disabled>
        <span class="spinner-grow spinner-grow-sm" role="status" aria-hidden="true"></span>
        <span class="visually-hidden">加载中...</span>
      </button>
      <button class="btn btn-primary" type="button" disabled>
        <span class="spinner-grow spinner-grow-sm" role="status" aria-hidden="true"></span>
        加载中...
      </button>