列表组

列表组是一个灵活而强大的组件，用于显示一系列内容。修改和扩展它们以支持其中的几乎所有内容。

在此页

基本示例

最基本的列表组是一个无序列表，其中包含列表项和适当的类。使用以下选项或根据需要使用您自己的 CSS 构建它。

An item
A second item
A third item
A fourth item
And a fifth one

HTML

<ul class="list-group">
  <li class="list-group-item">An item</li>
  <li class="list-group-item">A second item</li>
  <li class="list-group-item">A third item</li>
  <li class="list-group-item">A fourth item</li>
  <li class="list-group-item">And a fifth one</li>
</ul>

选中

添加.active到.list-group-item以指示当前活动选择。

An active item
A second item
A third item
A fourth item
And a fifth one

HTML

<ul class="list-group">
  <li class="list-group-item active" aria-current="true">An active item</li>
  <li class="list-group-item">A second item</li>
  <li class="list-group-item">A third item</li>
  <li class="list-group-item">A fourth item</li>
  <li class="list-group-item">And a fifth one</li>
</ul>

禁用项目

添加.disabled到.list-group-item以使其显示为已禁用。请注意，某些元素.disabled还需要自定义 JavaScript 才能完全禁用其点击事件（例如，链接）。

A disabled item
A second item
A third item
A fourth item
And a fifth one

HTML

<ul class="list-group">
  <li class="list-group-item disabled" aria-disabled="true">A disabled item</li>
  <li class="list-group-item">A second item</li>
  <li class="list-group-item">A third item</li>
  <li class="list-group-item">A fourth item</li>
  <li class="list-group-item">And a fifth one</li>
</ul>

链接和按钮

使用<a>或<button>并添加.list-group-item-action 创建具有hover、disableed、active状态的交互列表组，我们将这些伪类分开，以确保由非交互式元素（如<li>或<div>）组成的列表组不提供点击或点击功能。

一定不要在这里使用标准.btn类。

The current link item A second link item A third link item A fourth link item A disabled link item

HTML

<div class="list-group">
  <a href="#" class="list-group-item list-group-item-action active" aria-current="true">
    The current link item
  </a>
  <a href="#" class="list-group-item list-group-item-action">A second link item</a>
  <a href="#" class="list-group-item list-group-item-action">A third link item</a>
  <a href="#" class="list-group-item list-group-item-action">A fourth link item</a>
  <a class="list-group-item list-group-item-action disabled">A disabled link item</a>
</div>

使用<button>，您还可以使用disabled属性而不是.disabled类。遗憾的是，<a>不支持 disabled 属性。

HTML

<div class="list-group">
  <button type="button" class="list-group-item list-group-item-action active" aria-current="true">
    The current button
  </button>
  <button type="button" class="list-group-item list-group-item-action">A second button item</button>
  <button type="button" class="list-group-item list-group-item-action">A third button item</button>
  <button type="button" class="list-group-item list-group-item-action">A fourth button item</button>
  <button type="button" class="list-group-item list-group-item-action" disabled>A disabled button item</button>
</div>

Flush

添加.list-group-flush以删除一些边框和圆角以在父容器（例如，卡片）中呈现列表组项的边到边。

An item
A second item
A third item
A fourth item
And a fifth one

HTML

<ul class="list-group list-group-flush">
  <li class="list-group-item">An item</li>
  <li class="list-group-item">A second item</li>
  <li class="list-group-item">A third item</li>
  <li class="list-group-item">A fourth item</li>
  <li class="list-group-item">And a fifth one</li>
</ul>

编号

添加.list-group-numbered修饰符类（并可选地使用<ol>元素）以选择加入编号列表组项目。数字是通过 CSS（与<ol>默认浏览器样式相反）生成的，以便更好地放置在列表组项目中并允许更好的自定义。

数字由counter-reset在<ol>上生成，然后在<li>上使用::before伪元素通过counter-increment和content设置样式和位置。

A list item
A list item
A list item

HTML

<ol class="list-group list-group-numbered">
  <li class="list-group-item">A list item</li>
  <li class="list-group-item">A list item</li>
  <li class="list-group-item">A list item</li>
</ol>

这些也适用于自定义内容。

Subheading
Content for list item
14
Subheading
Content for list item
14
Subheading
Content for list item
14

HTML

<ol class="list-group list-group-numbered">
  <li class="list-group-item d-flex justify-content-between align-items-start">
    <div class="ms-2 me-auto">
      <div class="fw-bold">Subheading</div>
      Content for list item
    </div>
    <span class="badge bg-primary rounded-pill">14</span>
  </li>
  <li class="list-group-item d-flex justify-content-between align-items-start">
    <div class="ms-2 me-auto">
      <div class="fw-bold">Subheading</div>
      Content for list item
    </div>
    <span class="badge bg-primary rounded-pill">14</span>
  </li>
  <li class="list-group-item d-flex justify-content-between align-items-start">
    <div class="ms-2 me-auto">
      <div class="fw-bold">Subheading</div>
      Content for list item
    </div>
    <span class="badge bg-primary rounded-pill">14</span>
  </li>
</ol>

水平的

添加.list-group-horizontal以跨所有断点将列表组项的布局从垂直更改为水平。或者，选择一个响应式变体.list-group-horizontal-{sm|md|lg|xl|xxl}，使列表组从该断点的min-width开始水平排列. 当前水平列表组不能与刷新列表组组合。

专业提示：水平时想要等宽列表组项目吗？添加.flex-fill到每个列表组项。

An item
A second item
A third item

An item
A second item
A third item

An item
A second item
A third item

An item
A second item
A third item

An item
A second item
A third item

An item
A second item
A third item

HTML

<ul class="list-group list-group-horizontal">
  <li class="list-group-item">An item</li>
  <li class="list-group-item">A second item</li>
  <li class="list-group-item">A third item</li>
</ul>
<ul class="list-group list-group-horizontal-sm">
  <li class="list-group-item">An item</li>
  <li class="list-group-item">A second item</li>
  <li class="list-group-item">A third item</li>
</ul>
<ul class="list-group list-group-horizontal-md">
  <li class="list-group-item">An item</li>
  <li class="list-group-item">A second item</li>
  <li class="list-group-item">A third item</li>
</ul>
<ul class="list-group list-group-horizontal-lg">
  <li class="list-group-item">An item</li>
  <li class="list-group-item">A second item</li>
  <li class="list-group-item">A third item</li>
</ul>
<ul class="list-group list-group-horizontal-xl">
  <li class="list-group-item">An item</li>
  <li class="list-group-item">A second item</li>
  <li class="list-group-item">A third item</li>
</ul>
<ul class="list-group list-group-horizontal-xxl">
  <li class="list-group-item">An item</li>
  <li class="list-group-item">A second item</li>
  <li class="list-group-item">A third item</li>
</ul>

变体

小心！从 v5.3.0 开始，list-group-item-variant()Sass mixin 已被弃用。列表组项目变体现在在 Sass 循环中覆盖了它们的 CSS 变量。

使用上下文类来设置具有状态背景和颜色的列表项的样式。

A simple default list group item
A simple primary list group item
A simple secondary list group item
A simple success list group item
A simple danger list group item
A simple warning list group item
A simple info list group item
A simple light list group item
A simple dark list group item

HTML

<ul class="list-group">
  <li class="list-group-item">A simple default list group item</li>

  <li class="list-group-item list-group-item-primary">A simple primary list group item</li>
  <li class="list-group-item list-group-item-secondary">A simple secondary list group item</li>
  <li class="list-group-item list-group-item-success">A simple success list group item</li>
  <li class="list-group-item list-group-item-danger">A simple danger list group item</li>
  <li class="list-group-item list-group-item-warning">A simple warning list group item</li>
  <li class="list-group-item list-group-item-info">A simple info list group item</li>
  <li class="list-group-item list-group-item-light">A simple light list group item</li>
  <li class="list-group-item list-group-item-dark">A simple dark list group item</li>
</ul>

对于链接和按钮

上下文类.list-group-item-action也适用于<a>和<button>元素。请注意，此处添加的悬停样式在上一个示例中不存在。还支持.active状态；应用它来指示上下文列表组项目上的活动选择。

A simple default list group item A simple primary list group item A simple secondary list group item A simple success list group item A simple danger list group item A simple warning list group item A simple info list group item A simple light list group item A simple dark list group item

HTML

<div class="list-group">
  <a href="#" class="list-group-item list-group-item-action">A simple default list group item</a>

  <a href="#" class="list-group-item list-group-item-action list-group-item-primary">A simple primary list group item</a>
  <a href="#" class="list-group-item list-group-item-action list-group-item-secondary">A simple secondary list group item</a>
  <a href="#" class="list-group-item list-group-item-action list-group-item-success">A simple success list group item</a>
  <a href="#" class="list-group-item list-group-item-action list-group-item-danger">A simple danger list group item</a>
  <a href="#" class="list-group-item list-group-item-action list-group-item-warning">A simple warning list group item</a>
  <a href="#" class="list-group-item list-group-item-action list-group-item-info">A simple info list group item</a>
  <a href="#" class="list-group-item list-group-item-action list-group-item-light">A simple light list group item</a>
  <a href="#" class="list-group-item list-group-item-action list-group-item-dark">A simple dark list group item</a>
</div>

向辅助技术传达意义

使用颜色来添加含义仅提供视觉指示，不会将其传达给辅助技术的用户——例如屏幕阅读器。确保用颜色表示的信息要么从内容本身（例如可见文本）中显而易见，要么通过其他方式包含在内，例如隐藏在.visually-hidden类中的附加文本。

带徽章

在一些实用程序的帮助下，将徽章添加到任何列表组项目以显示未读计数、活动等。

A list item 14
A second list item 2
A third list item 1

HTML

<ul class="list-group">
  <li class="list-group-item d-flex justify-content-between align-items-center">
    A list item
    <span class="badge bg-primary rounded-pill">14</span>
  </li>
  <li class="list-group-item d-flex justify-content-between align-items-center">
    A second list item
    <span class="badge bg-primary rounded-pill">2</span>
  </li>
  <li class="list-group-item d-flex justify-content-between align-items-center">
    A third list item
    <span class="badge bg-primary rounded-pill">1</span>
  </li>
</ul>

自定义内容

在flexbox 实用程序的帮助下，在其中添加几乎所有 HTML，甚至对于像下面这样的链接列表组也是如此。

List group item heading

3 days ago

Some placeholder content in a paragraph.

And some small print.

List group item heading

3 days ago

Some placeholder content in a paragraph.

And some muted small print.

List group item heading

3 days ago

Some placeholder content in a paragraph.

And some muted small print.

HTML

<div class="list-group">
  <a href="#" class="list-group-item list-group-item-action active" aria-current="true">
    <div class="d-flex w-100 justify-content-between">
      <h5 class="mb-1">List group item heading</h5>
      <small>3 days ago</small>
    </div>
    <p class="mb-1">Some placeholder content in a paragraph.</p>
    <small>And some small print.</small>
  </a>
  <a href="#" class="list-group-item list-group-item-action">
    <div class="d-flex w-100 justify-content-between">
      <h5 class="mb-1">List group item heading</h5>
      <small class="text-muted">3 days ago</small>
    </div>
    <p class="mb-1">Some placeholder content in a paragraph.</p>
    <small class="text-muted">And some muted small print.</small>
  </a>
  <a href="#" class="list-group-item list-group-item-action">
    <div class="d-flex w-100 justify-content-between">
      <h5 class="mb-1">List group item heading</h5>
      <small class="text-muted">3 days ago</small>
    </div>
    <p class="mb-1">Some placeholder content in a paragraph.</p>
    <small class="text-muted">And some muted small print.</small>
  </a>
</div>

复选框和单选框

将 Bootstrap 的复选框和单选按钮放在列表组项中，并根据需要进行自定义。您可以在没有<label>的情况下使用它们，但请记住包含aria-label可访问性的属性和值。

First checkbox
Second checkbox
Third checkbox

HTML

<ul class="list-group">
  <li class="list-group-item">
    <input class="form-check-input me-1" type="checkbox" value="" id="firstCheckbox">
    <label class="form-check-label" for="firstCheckbox">First checkbox</label>
  </li>
  <li class="list-group-item">
    <input class="form-check-input me-1" type="checkbox" value="" id="secondCheckbox">
    <label class="form-check-label" for="secondCheckbox">Second checkbox</label>
  </li>
  <li class="list-group-item">
    <input class="form-check-input me-1" type="checkbox" value="" id="thirdCheckbox">
    <label class="form-check-label" for="thirdCheckbox">Third checkbox</label>
  </li>
</ul>

First radio
Second radio
Third radio

HTML

<ul class="list-group">
  <li class="list-group-item">
    <input class="form-check-input me-1" type="radio" name="listGroupRadio" value="" id="firstRadio" checked>
    <label class="form-check-label" for="firstRadio">First radio</label>
  </li>
  <li class="list-group-item">
    <input class="form-check-input me-1" type="radio" name="listGroupRadio" value="" id="secondRadio">
    <label class="form-check-label" for="secondRadio">Second radio</label>
  </li>
  <li class="list-group-item">
    <input class="form-check-input me-1" type="radio" name="listGroupRadio" value="" id="thirdRadio">
    <label class="form-check-label" for="thirdRadio">Third radio</label>
  </li>
</ul>

您可以在<label>添加.stretched-link类使整个列表组项目可点击。

First checkbox
Second checkbox
Third checkbox

HTML

<ul class="list-group">
  <li class="list-group-item">
    <input class="form-check-input me-1" type="checkbox" value="" id="firstCheckboxStretched">
    <label class="form-check-label stretched-link" for="firstCheckboxStretched">First checkbox</label>
  </li>
  <li class="list-group-item">
    <input class="form-check-input me-1" type="checkbox" value="" id="secondCheckboxStretched">
    <label class="form-check-label stretched-link" for="secondCheckboxStretched">Second checkbox</label>
  </li>
  <li class="list-group-item">
    <input class="form-check-input me-1" type="checkbox" value="" id="thirdCheckboxStretched">
    <label class="form-check-label stretched-link" for="thirdCheckboxStretched">Third checkbox</label>
  </li>
</ul>

CSS

变量

添加于 v5.2.0

作为 Bootstrap 不断发展的 CSS 变量方法的一部分，列表组现在使用本地 CSS 变量.list-group来增强实时自定义。CSS 变量的值是通过 Sass 设置的，因此仍然支持 Sass 自定义。

  --#{$prefix}list-group-color: #{$list-group-color};
  --#{$prefix}list-group-bg: #{$list-group-bg};
  --#{$prefix}list-group-border-color: #{$list-group-border-color};
  --#{$prefix}list-group-border-width: #{$list-group-border-width};
  --#{$prefix}list-group-border-radius: #{$list-group-border-radius};
  --#{$prefix}list-group-item-padding-x: #{$list-group-item-padding-x};
  --#{$prefix}list-group-item-padding-y: #{$list-group-item-padding-y};
  --#{$prefix}list-group-action-color: #{$list-group-action-color};
  --#{$prefix}list-group-action-hover-color: #{$list-group-action-hover-color};
  --#{$prefix}list-group-action-hover-bg: #{$list-group-hover-bg};
  --#{$prefix}list-group-action-active-color: #{$list-group-action-active-color};
  --#{$prefix}list-group-action-active-bg: #{$list-group-action-active-bg};
  --#{$prefix}list-group-disabled-color: #{$list-group-disabled-color};
  --#{$prefix}list-group-disabled-bg: #{$list-group-disabled-bg};
  --#{$prefix}list-group-active-color: #{$list-group-active-color};
  --#{$prefix}list-group-active-bg: #{$list-group-active-bg};
  --#{$prefix}list-group-active-border-color: #{$list-group-active-border-color};

Sass 变量

$list-group-color:                  var(--#{$prefix}body-color);
$list-group-bg:                     var(--#{$prefix}body-bg);
$list-group-border-color:           var(--#{$prefix}border-color);
$list-group-border-width:           var(--#{$prefix}border-width);
$list-group-border-radius:          var(--#{$prefix}border-radius);

$list-group-item-padding-y:         $spacer * .5;
$list-group-item-padding-x:         $spacer;
// fusv-disable
$list-group-item-bg-scale:          -80%; // Deprecated in v5.3.0
$list-group-item-color-scale:       40%; // Deprecated in v5.3.0
// fusv-enable

$list-group-hover-bg:               var(--#{$prefix}tertiary-bg);
$list-group-active-color:           $component-active-color;
$list-group-active-bg:              $component-active-bg;
$list-group-active-border-color:    $list-group-active-bg;

$list-group-disabled-color:         var(--#{$prefix}secondary-color);
$list-group-disabled-bg:            $list-group-bg;

$list-group-action-color:           var(--#{$prefix}secondary-color);
$list-group-action-hover-color:     var(--#{$prefix}emphasis-color);

$list-group-action-active-color:    var(--#{$prefix}body-color);
$list-group-action-active-bg:       var(--#{$prefix}secondary-bg);

Sass 混入

与$theme-colors结合使用以生成.list-group-item的上下文变体类。

@mixin list-group-item-variant($state, $background, $color) {
  .list-group-item-#{$state} {
    color: $color;
    background-color: $background;

    &.list-group-item-action {
      &:hover,
      &:focus {
        color: $color;
        background-color: shade-color($background, 10%);
      }

      &.active {
        color: $white;
        background-color: $color;
        border-color: $color;
      }
    }
  }
}

Sass循环

生成修饰符类并覆盖 CSS 变量的循环。

// List group contextual variants
//
// Add modifier classes to change text and background color on individual items.
// Organizationally, this must come after the `:hover` states.

@each $state in map-keys($theme-colors) {
  .list-group-item-#{$state} {
    --#{$prefix}list-group-color: var(--#{$prefix}#{$state}-text);
    --#{$prefix}list-group-bg: var(--#{$prefix}#{$state}-bg-subtle);
    --#{$prefix}list-group-border-color: var(--#{$prefix}#{$state}-border-subtle);

    &.list-group-item-action {
      &:hover,
      &:focus {
        --#{$prefix}list-group-action-hover-color: var(--#{$prefix}emphasis-color);
        --#{$prefix}list-group-action-hover-bg: var(--#{$prefix}#{$state}-border-subtle);
      }

      &:active {
        --#{$prefix}list-group-active-color: var(--#{$prefix}emphasis-color);
        --#{$prefix}list-group-active-bg: var(--#{$prefix}#{$state}-text);
        --#{$prefix}list-group-active-border-color: var(--#{$prefix}#{$state}-text);
      }
    }
  }
}

JavaScript 行为

使用选项卡 JavaScript 插件（单独或通过编译bootstrap.js文件包含它）来扩展我们的列表组以创建本地内容的可选项卡面板。

Home Profile Messages Settings

Some placeholder content in a paragraph relating to "Home". And some more content, used here just to pad out and fill this tab panel. In production, you would obviously have more real content here. And not just text. It could be anything, really. Text, images, forms.

Some placeholder content in a paragraph relating to "Profile". And some more content, used here just to pad out and fill this tab panel. In production, you would obviously have more real content here. And not just text. It could be anything, really. Text, images, forms.

Some placeholder content in a paragraph relating to "Messages". And some more content, used here just to pad out and fill this tab panel. In production, you would obviously have more real content here. And not just text. It could be anything, really. Text, images, forms.

Some placeholder content in a paragraph relating to "Settings". And some more content, used here just to pad out and fill this tab panel. In production, you would obviously have more real content here. And not just text. It could be anything, really. Text, images, forms.

<div class="row">
  <div class="col-4">
    <div class="list-group" id="list-tab" role="tablist">
      <a class="list-group-item list-group-item-action active" id="list-home-list" data-bs-toggle="list" href="#list-home" role="tab" aria-controls="list-home">Home</a>
      <a class="list-group-item list-group-item-action" id="list-profile-list" data-bs-toggle="list" href="#list-profile" role="tab" aria-controls="list-profile">Profile</a>
      <a class="list-group-item list-group-item-action" id="list-messages-list" data-bs-toggle="list" href="#list-messages" role="tab" aria-controls="list-messages">Messages</a>
      <a class="list-group-item list-group-item-action" id="list-settings-list" data-bs-toggle="list" href="#list-settings" role="tab" aria-controls="list-settings">Settings</a>
    </div>
  </div>
  <div class="col-8">
    <div class="tab-content" id="nav-tabContent">
      <div class="tab-pane fade show active" id="list-home" role="tabpanel" aria-labelledby="list-home-list">...</div>
      <div class="tab-pane fade" id="list-profile" role="tabpanel" aria-labelledby="list-profile-list">...</div>
      <div class="tab-pane fade" id="list-messages" role="tabpanel" aria-labelledby="list-messages-list">...</div>
      <div class="tab-pane fade" id="list-settings" role="tabpanel" aria-labelledby="list-settings-list">...</div>
    </div>
  </div>
</div>

使用数据属性

您可以通过简单地在元素上指定data-bs-toggle="list"来激活列表组导航而无需编写任何 JavaScript 。在.list-group-item上使用这些数据属性。

<div role="tabpanel">
  <!-- List group -->
  <div class="list-group" id="myList" role="tablist">
    <a class="list-group-item list-group-item-action active" data-bs-toggle="list" href="#home" role="tab">Home</a>
    <a class="list-group-item list-group-item-action" data-bs-toggle="list" href="#profile" role="tab">Profile</a>
    <a class="list-group-item list-group-item-action" data-bs-toggle="list" href="#messages" role="tab">Messages</a>
    <a class="list-group-item list-group-item-action" data-bs-toggle="list" href="#settings" role="tab">Settings</a>
  </div>

  <!-- Tab panes -->
  <div class="tab-content">
    <div class="tab-pane active" id="home" role="tabpanel">...</div>
    <div class="tab-pane" id="profile" role="tabpanel">...</div>
    <div class="tab-pane" id="messages" role="tabpanel">...</div>
    <div class="tab-pane" id="settings" role="tabpanel">...</div>
  </div>
</div>

通过 JavaScript

通过 JavaScript 启用可选项卡列表项（每个列表项需要单独激活）：

const triggerTabList = document.querySelectorAll('#myTab a')
triggerTabList.forEach(triggerEl => {
  const tabTrigger = new bootstrap.Tab(triggerEl)

  triggerEl.addEventListener('click', event => {
    event.preventDefault()
    tabTrigger.show()
  })
})

您可以通过多种方式激活单个列表项：

const triggerEl = document.querySelector('#myTab a[href="#profile"]')
bootstrap.Tab.getInstance(triggerEl).show() // Select tab by name

const triggerFirstTabEl = document.querySelector('#myTab li:first-child a')
bootstrap.Tab.getInstance(triggerFirstTabEl).show() // Select first tab

淡入淡出效果

要使选项卡面板淡入，请添加.fade到每个.tab-pane. 第一个选项卡窗格还必须添加.show使初始内容可见。

<div class="tab-content">
  <div class="tab-pane fade show active" id="home" role="tabpanel">...</div>
  <div class="tab-pane fade" id="profile" role="tabpanel">...</div>
  <div class="tab-pane fade" id="messages" role="tabpanel">...</div>
  <div class="tab-pane fade" id="settings" role="tabpanel">...</div>
</div>

方法

异步方法和转换

所有 API 方法都是异步的并开始一个转换。它们会在转换开始但结束之前立即返回给调用者。此外，将忽略对转换组件的方法调用。

有关详细信息，请参阅我们的 JavaScript 文档。

将您的内容激活为选项卡元素。

您可以使用构造函数创建选项卡实例，例如：

const bsTab = new bootstrap.Tab('#myTab')

方法	描述
`dispose`	销毁元素的选项卡。
`getInstance`	允许您获取与 DOM 元素关联的选项卡实例的静态方法，您可以像这样使用它`bootstrap.Tab.getInstance(element)`：
`getOrCreateInstance`	返回与 DOM 元素关联的选项卡实例的静态方法，或者在未初始化的情况下创建一个新的选项卡实例。你可以像这样使用它`bootstrap.Tab.getOrCreateInstance(element)`：
`show`	选择给定的选项卡并显示其关联的窗格。之前选择的任何其他选项卡都会取消选择，并且其关联的窗格会隐藏。在选项卡窗格实际显示之前（即事件发生之前）返回给调用者。`shown.bs.tab`

事件

显示新选项卡时，事件按以下顺序触发：

hide.bs.tab（在当前活动选项卡上）
show.bs.tab（在待显示选项卡上）
hidden.bs.tab（在前一个活动选项卡上，与事件相同的选项卡hide.bs.tab）
shown.bs.tab（在新激活的刚刚显示的选项卡上，与事件相同的选项卡show.bs.tab）

如果没有选项卡处于活动状态，则不会触发hide.bs.tab和事件。hidden.bs.tab

事件类型	描述
`hide.bs.tab`	当要显示新选项卡时会触发此事件（因此要隐藏以前的活动选项卡）。使用`event.target`和`event.relatedTarget`分别定位当前活动选项卡和新的即将激活的选项卡。
`hidden.bs.tab`	此事件在显示新选项卡后触发（因此隐藏了先前的活动选项卡）。使用`event.target`和`event.relatedTarget`分别定位前一个活动选项卡和新的活动选项卡。
`show.bs.tab`	此事件在选项卡显示时触发，但在显示新选项卡之前。使用`event.target`和`event.relatedTarget`分别定位活动选项卡和上一个活动选项卡（如果可用）。
`shown.bs.tab`	显示选项卡后，此事件会在选项卡显示时触发。使用`event.target`和`event.relatedTarget`分别定位活动选项卡和上一个活动选项卡（如果可用）。

const tabElms = document.querySelectorAll('a[data-bs-toggle="list"]')
tabElms.forEach(tabElm => {
  tabElm.addEventListener('shown.bs.tab', event => {
    event.target // newly activated tab
    event.relatedTarget // previous active tab
  })
})