列表组（List group）

列表组是用于显示一系列内容的灵活而强大的组件。修改和扩展它们可支持其中的任何内容。

On this page

基本示例

最基本的列表组是带有列表项和适当类别的无序列表。在此基础上，你可以使用后面的选项，或根据需要使用自己的 CSS。

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>

活动项目

将 .active 添加到 .list-group-item，以指示当前的活动选区。

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

向.list-group-item添加.disabled可使其 看起来 禁用。请注意，某些带有.disabled的元素还需要自定义 JavaScript 才能完全禁用其点击事件（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>，通过添加 . list-group-item-action 来创建具有悬停、禁用和激活状态的 actionable 列表组项。我们将这些伪类分开，以确保由非交互式元素（如 <li> 或 <div> ）组成的列表组不会提供点击或轻点功能。

请务必 不要在此处使用标准的 .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" aria-disabled="true">A disabled link item</a>
</div>

使用 <button>s 时，您还可以使用 disabled 属性而不是 .disabled 类。 With <button>s, you can also make use of the disabled attribute instead of the .disabled class. 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>

刷新（Flush）

添加 .list-group-flush，以移除某些边框和圆角，从而在父容器（如卡片）中呈现边缘到边缘的列表组项。

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（可选择使用 <ol> 元素），以选择进入编号列表组项。数字是通过 CSS 生成的（不同于<ol> 默认的浏览器样式），以便更好地放置在列表组项中，并允许更好的自定义。

数字由<ol>上的counter-reset生成，然后通过::before伪元素在<li>上与counter-increment和content一起进行样式设计和放置。

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>

这些功能对自定义内容也非常有效。

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 text-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 text-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 text-bg-primary rounded-pill">14</span>
  </li>
</ol>

水平列表组

添加 .list-group-horizontal，可将列表组项在所有断点上的布局从垂直改为水平。或者，选择响应式变体 .list-group-horizontal-{sm|md|lg|xl|xxl}，使列表组从该断点的 min-width 开始水平布局。目前，水平列表组不能与齐平列表组结合使用。

专业提示： 想要水平方向上的列表组项等宽？在每个列表组项中添加 .flex-fill。

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

注意！ 从 v5.3.0 起，list-group-item-variant() Sass mixin 已被弃用。列表组项变量现在可以在 a Sass loop 中重写 CSS 变量。

使用上下文类为列表项设计有状态的背景和颜色。

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>

链接和按钮

上下文类还可与 .list-group-item-action 一起用于 <a> 和 <button> 元素。请注意，这里添加了悬停样式，而上一个示例中没有。还支持 .active 状态；应用该状态可在上下文列表组项上显示活动选择。

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>

可用性提示： 使用颜色来增加含义，只能提供视觉指示，无法传达给屏幕阅读器等辅助技术的用户。请确保从内容本身（例如，具有足够色彩对比度的可见文本）或通过其他方式（例如使用.visually-hidden类隐藏的附加文本）明显看出含义。

带徽章

在一些实用工具的帮助下，为任何列表组项目添加徽章，以显示未读计数、活动等信息。

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 text-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 text-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 text-bg-primary rounded-pill">1</span>
  </li>
</ul>

自定义内容

借助 flexbox 实用工具，你可以在其中添加几乎任何 HTML 内容，甚至是像下面这样的链接列表组。

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-body-secondary">3 days ago</small>
    </div>
    <p class="mb-1">Some placeholder content in a paragraph.</p>
    <small class="text-body-secondary">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-body-secondary">3 days ago</small>
    </div>
    <p class="mb-1">Some placeholder content in a paragraph.</p>
    <small class="text-body-secondary">And some muted small print.</small>
  </a>
</div>

复选框和单选框

在列表组项中放置 Bootstrap 的复选框和单选框，并根据需要进行自定义。您可以在不使用 <label> 的情况下使用它们，但请记得包含一个 aria-label 属性和值，以便于访问。

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> 上使用.stretched-link，使整个列表组项目都可以点击。

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

Added in 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.list-group上的本地 CSS 变量来增强实时自定义功能。CSS 变量的值通过 Sass 设置，因此仍支持 Sass 自定义。

scss/_list-group.scss

--#{$prefix}list-group-color: #{$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

scss/_variables.scss

$list-group-color:                  var(--#{$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 mixins

Deprecated in v5.3.0

scss/mixins/_list-group.scss

@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 loop 循环

循环，通过覆盖 CSS 变量生成修改器类。

scss/_list-group.scss

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

JavaScript 行为

使用选项卡 JavaScript 插件（单独包含或通过编译后的 bootstrap.js 文件包含）扩展我们的列表组，创建本地内容的选项卡面板。

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

只需指定 data-bs-toggle="list" 或在元素上指定 data-bs-toggle="list" 即可激活列表组导航，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 启用标签列表项（每个列表项都需要单独激活）：

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

渐变效果

要使选项卡面板淡入，请在每个 .tab-pane 中添加 .fade。第一个选项卡窗格也必须有 .show，以使初始内容可见。

<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

所有 API 方法都是异步的，并且会启动一个过渡，它们会在过渡开始后、结束前返回给调用者。此外，对过渡组件的方法调用将被忽略。更多信息，请参阅 JavaScript 文档

将内容激活为标签页元素。

例如，您可以使用构造函数创建一个选项卡实例：

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

Method	Description
`dispose`	销毁元素的选项卡。
`getInstance`	静态方法，用于获取与 DOM 元素相关联的选项卡实例： `bootstrap.Tab.getInstance(element)`。
`getOrCreateInstance`	静态方法，用于返回与 DOM 元素相关联的标签实例，或在未初始化的情况下创建一个新的标签实例。您可以这样使用它 `bootstrap.Tab.getOrCreateInstance(element)`。
`show`	选择给定的选项卡并显示其相关窗格。之前选中的任何其他选项卡都会被取消选中，其相关窗格也会被隐藏。在选项卡窗格实际显示之前（即在 `shown.bs.tab` 事件发生之前）返回调用者。

事件

显示新标签页时，事件按以下顺序触发：

hide.bs.tab (在当前活动标签页上)
show.bs.tab (在待显示选项卡上)
hidden.bs.tab (在前一个活动标签页上，与 hide.bs.tab 事件相同)
shown.bs.tab (在新活动的刚显示的选项卡上，与 show.bs.tab 事件相同)

如果没有标签页处于活动状态，则 hide.bs.tab 和 hidden.bs.tab 事件不会被触发。

Event type	Description
`hide.bs.tab`	当要显示一个新标签页（因此要隐藏之前的活动标签页）时，该事件就会触发。使用 `event.target` 和 `event.relatedTarget` 分别定位当前活动标签页和即将活动的新标签页。
`hidden.bs.tab`	该事件在新标签页显示后触发（因此前一个活动标签页被隐藏）。使用`event.target`和`event.relatedTarget`可分别针对前一个活动标签页和新的活动标签页。
`show.bs.tab`	该事件在标签页显示时触发，但在新标签页显示之前。使用`event.target`和`event.relatedTarget`可分别瞄准活动标签页和上一个活动标签页（如果有）。
`shown.bs.tab`	此事件在标签页显示后触发。使用`event.target`和`event.relatedTarget`可分别针对活动标签页和上一个活动标签页（如果有）。

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
  })
})