Tabs

Create a widget of tabbable panes of local content. The tabs component is built upon navs and cards internally, and provides full keyboard navigation control of the tabs.

For navigation based tabs (i.e. tabs that would change the URL), use the <b-nav> component instead.

Basic usage

<div>
  <b-tabs content-class="mt-3">
    <b-tab title="First" active><p>I'm the first tab</p></b-tab>
    <b-tab title="Second"><p>I'm the second tab</p></b-tab>
    <b-tab title="Disabled" disabled><p>I'm a disabled tab!</p></b-tab>
  </b-tabs>
</div>

<!-- b-tabs.vue -->

Tip: You should supply each child <b-tab> component a unique key value if dynamically adding or removing <b-tab> components (i.e. v-if or for loops). The key attribute is a special Vue attribute, see https://vuejs.org/v2/api/#key.

Cards integration

Tabs support integrating with Bootstrap cards. Just add the card property to <b-tabs> and place it inside a <b-card> component. Note that you should add theno-body prop on the <b-card> component in order to properly decorate the card header and remove the extra padding introduced by card-body.

<div>
  <b-card no-body>
    <b-tabs card>
      <b-tab title="Tab 1" active>
        <b-card-text>Tab contents 1</b-card-text>
      </b-tab>
      <b-tab title="Tab 2">
        <b-card-text>Tab contents 2</b-card-text>
      </b-tab>
    </b-tabs>
  </b-card>
</div>

<!-- b-tabs-card.vue -->

When <b-tabs> is in card mode, each <b-tab> sub-component will automatically have the card-body class applied (this class provides the padding around the tab content). To disable the card-body class, set the no-body prop on the <b-tab> sub component.

<div>
  <b-card no-body>
    <b-tabs card>
      <b-tab no-body title="Picture 1">
        <b-card-img bottom src="https://picsum.photos/600/200/?image=21" alt="Image 21"></b-card-img>
        <b-card-footer>Picture 1 footer</b-card-footer>
      </b-tab>

      <b-tab no-body title="Picture 2">
        <b-card-img bottom src="https://picsum.photos/600/200/?image=25" alt="Image 25"></b-card-img>
        <b-card-footer>Picture 2 footer</b-card-footer>
      </b-tab>

      <b-tab no-body title="Picture 3">
        <b-card-img bottom src="https://picsum.photos/600/200/?image=26" alt="Image 26"></b-card-img>
        <b-card-footer>Picture 3 footer</b-card-footer>
      </b-tab>

      <b-tab title="Text">
        <b-card-title>This tab does not have the <code>no-body</code> prop set</b-card-title>
        <b-card-text>
          Quis magna Lorem anim amet ipsum do mollit sit cillum voluptate ex nulla tempor. Laborum
          consequat non elit enim exercitation cillum aliqua consequat id aliqua. Esse ex
          consectetur mollit voluptate est in duis laboris ad sit ipsum anim Lorem. Incididunt
          veniam velit elit elit veniam Lorem aliqua quis ullamco deserunt sit enim elit aliqua
          esse irure.
        </b-card-text>
      </b-tab>
    </b-tabs>
  </b-card>
</div>

<!-- b-tabs-card-no-body.vue -->

Note: Setting the no-body prop on <b-tab> will have no affect when <b-tabs> is not in card mode (as the card-body class is only set when in card mode).

Refer to the Cards documentation for more details on card components.

Pills variant

Tabs use the tabs styling by default. Just add pills property to <b-tabs> for the pill style variant.

<div>
  <b-card no-body>
    <b-tabs pills card>
      <b-tab title="Tab 1" active><b-card-text>Tab contents 1</b-card-text></b-tab>
      <b-tab title="Tab 2"><b-card-text>Tab contents 2</b-card-text></b-tab>
    </b-tabs>
  </b-card>
</div>

<!-- b-tabs-pills.vue -->

Fill and justify

Force your <b-tabs> controls to extend the full available width.

Fill

To proportionately fill all available space with your tab controls, set the fill prop. Notice that all horizontal space is occupied, but not every control has the same width.

<div>
  <b-tabs content-class="mt-3" fill>
    <b-tab title="First" active><p>I'm the first tab</p></b-tab>
    <b-tab title="Second"><p>I'm the second tab</p></b-tab>
    <b-tab title="Very, very long title"><p>I'm the tab with the very, very long title</p></b-tab>
    <b-tab title="Disabled" disabled><p>I'm a disabled tab!</p></b-tab>
  </b-tabs>
</div>

<!-- b-tabs-fill.vue -->

Justified

For equal-width controls, use the justified prop instead. All horizontal space will be occupied by the controls, but unlike using fill above, every control will be the same width.

<div>
  <b-tabs content-class="mt-3" justified>
    <b-tab title="First" active><p>I'm the first tab</p></b-tab>
    <b-tab title="Second"><p>I'm the second tab</p></b-tab>
    <b-tab title="Very, very long title"><p>I'm the tab with the very, very long title</p></b-tab>
    <b-tab title="Disabled" disabled><p>I'm a disabled tab!</p></b-tab>
  </b-tabs>
</div>

<!-- b-tabs-justified.vue -->

Alignment

To align your tab controls, use the align prop. Available values are left, center and right.

<div>
  <b-tabs content-class="mt-3" align="center">
    <b-tab title="First" active><p>I'm the first tab</p></b-tab>
    <b-tab title="Second"><p>I'm the second tab</p></b-tab>
    <b-tab title="Disabled" disabled><p>I'm a disabled tab!</p></b-tab>
  </b-tabs>
</div>

<!-- b-tabs-alignment.vue -->

Bottom placement of tab controls

Visually move the tab controls to the bottom by setting the prop end.

<div>
  <b-card no-body>
    <b-tabs pills card end>
      <b-tab title="Tab 1" active><b-card-text>Tab contents 1</b-card-text></b-tab>
      <b-tab title="Tab 2"><b-card-text>Tab contents 2</b-card-text></b-tab>
    </b-tabs>
  </b-card>
</div>

<!-- b-tabs-bottom.vue -->

Caveats:

Bottom placement visually works best with the pills variant. When using the default tabs variant, you may want to provided your own custom styling classes, as Bootstrap v4 CSS assumes the tabs will always be placed on the top of the tabs content.
To provide a better user experience with bottom placed controls, ensure that the content of each tab pane is the same height and fits completely within the visible viewport, otherwise the user will need to scroll up to read the start of the tabbed content.

Vertical tabs

Have the tab controls placed on the lefthand side by setting the vertical prop to true. Vertical tabs work with or without card mode enabled.

<div>
  <b-card no-body>
    <b-tabs pills card vertical>
      <b-tab title="Tab 1" active><b-card-text>Tab contents 1</b-card-text></b-tab>
      <b-tab title="Tab 2"><b-card-text>Tab contents 2</b-card-text></b-tab>
      <b-tab title="Tab 3"><b-card-text>Tab contents 3</b-card-text></b-tab>
    </b-tabs>
  </b-card>
</div>

<!-- b-tabs-vertical.vue -->

Visually move the tab controls to the right hand side by setting the end prop:

<div>
  <b-card no-body>
    <b-tabs pills card vertical end>
      <b-tab title="Tab 1" active><b-card-text>Tab contents 1</b-card-text></b-tab>
      <b-tab title="Tab 2"><b-card-text>Tab contents 2</b-card-text></b-tab>
      <b-tab title="Tab 3"><b-card-text>Tab contents 3</b-card-text></b-tab>
    </b-tabs>
  </b-card>
</div>

<!-- b-tabs-vertical-end.vue -->

The width of the vertical tab controls will expand to fit the width of the tab title. To control the width, set a width utility class via the prop nav-wrapper-class. You can use values such as w-25 (25% width), w-50 (50% width), etc., or column classes such as col-2, col-3, etc.

<div>
  <b-card no-body>
    <b-tabs pills card vertical nav-wrapper-class="w-50">
      <b-tab title="Tab 1" active><b-card-text>Tab contents 1</b-card-text></b-tab>
      <b-tab title="Tab 2"><b-card-text>Tab contents 2</b-card-text></b-tab>
      <b-tab title="Tab 3"><b-card-text>Tab contents 3</b-card-text></b-tab>
    </b-tabs>
  </b-card>
</div>

<!-- b-tabs-vertical-width.vue -->

Vertical placement visually works best with the pills variant. When using the default tabs variant, you may want to provided your own custom styling classes, as Bootstrap v4 CSS assumes the tab controls will always be placed on the top of the tabs content.

Note: overflowing text may occur if your width is narrower than the tab title. You may need additional custom styling.

Active classes

To apply classes to the currently active control or tab use the active-nav-item-class and active-tab-class props.

<div>
  <b-tabs
    active-nav-item-class="font-weight-bold text-uppercase text-danger"
    active-tab-class="font-weight-bold text-success"
    content-class="mt-3"
  >
    <b-tab title="First" active><p>I'm the first tab</p></b-tab>
    <b-tab title="Second"><p>I'm the second tab</p></b-tab>
    <b-tab title="Disabled" disabled><p>I'm a disabled tab!</p></b-tab>
  </b-tabs>
</div>

<!-- b-tabs-classes.vue -->

Fade animation

Fade is enabled by default when changing tabs. It can disabled with no-fade property.

Add tabs without content

If you want to add extra tabs that do not have any content, you can put them in tabs-start or tabs-end slot(s):

<div>
  <b-tabs>
    <!-- Add your b-tab components here -->
    <template v-slot:tabs-end>
      <b-nav-item href="#" role="presentation" @click="() => {}">Another tab</b-nav-item>
      <li role="presentation" class="nav-item align-self-center">Plain text</li>
    </template>
  </b-tabs>
</div>

<!-- b-tabs-item-slot.vue -->

Use the tabs-start slot to place extra tab buttons before the content tab buttons, and use the tabs-end slot to place extra tab buttons after the content tab buttons.

Note: extra (contentless) tab buttons should be a <b-nav-item> or have a root element of <li> and class nav-item for proper rendering and semantic markup.

Add custom content to tab title

If you want to add custom content to tab title, like HTML code, icons, or another non-interactive Vue component, this possible by using title slot of <b-tab>.

<div>
  <b-tabs>
    <b-tab active>
      <template v-slot:title>
        <b-spinner type="grow" small></b-spinner> I'm <i>custom</i> <strong>title</strong>
      </template>
      <p class="p-3">Tab contents 1</p>
    </b-tab>

    <b-tab>
      <template v-slot:title>
        <b-spinner type="border" small></b-spinner> Tab 2
      </template>
      <p class="p-3">Tab contents 2</p>
    </b-tab>
  </b-tabs>
</div>

<!-- b-tabs-title-slot.vue -->

Do not place interactive elements/components inside the title slot. The tab button is a link which does not support child interactive elements per the HTML5 spec.

Apply custom classes to the generated nav-tabs or pills

The tab selectors are based on Bootstrap v4's nav markup ( i.e. ul.nav > li.nav-item > a.nav-link). In some situations, you may want to add classes to the <li> (nav-item) and/or the <a> (nav-link) on a per tab basis. To do so, simply supply the classname to the title-item-class prop (for the <li> element) or title-link-class prop (for the <a> element). Value's can be passed as a string or array of strings.

Note: The active class is automatically applied to the active tabs <a> element. You may need to accommodate your custom classes for this.

<template>
  <div>
    <b-card no-body>
      <b-tabs v-model="tabIndex" card>
        <b-tab title="Tab 1" :title-link-class="linkClass(0)">Tab contents 1</b-tab>
        <b-tab title="Tab 2" :title-link-class="linkClass(1)">Tab contents 2</b-tab>
        <b-tab title="Tab 3" :title-link-class="linkClass(2)">Tab contents 3</b-tab>
      </b-tabs>
    </b-card>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        tabIndex: 0
      }
    },
    methods: {
      linkClass(idx) {
        if (this.tabIndex === idx) {
          return ['bg-primary', 'text-light']
        } else {
          return ['bg-light', 'text-info']
        }
      }
    }
  }
</script>

<!-- b-tabs-with-classes.vue -->

Lazy loading tab content

Sometimes it's preferred to load components & data only when activating a tab, instead of loading all tabs (and associated data) when rendering the <b-tabs> set.

Individual <b-tab> components can be lazy loaded via the lazy prop, which when set doesn't mount the content of the <b-tab> until it is activated (shown), and will be un-mounted when the tab is deactivated (hidden):

<b-tabs content-class="mt-3">
  <!-- This tabs content will always be mounted -->
  <b-tab title="Regular tab"><b-alert show>I'm always mounted</b-alert></b-tab>

  <!-- This tabs content will not be mounted until the tab is shown -->
  <!-- and will be un-mounted when hidden -->
  <b-tab title="Lazy tab" lazy><b-alert show>I'm lazy mounted!</b-alert></b-tab>
</b-tabs>

<!-- b-tabs-lazy-tab.vue -->

One can also make all tab's lazy by setting the lazy prop on the parent <b-tabs> component:

<b-tabs content-class="mt-3" lazy>
  <b-tab title="Tab 1"><b-alert show>I'm lazy mounted!</b-alert></b-tab>
  <b-tab title="Tab 2"><b-alert show>I'm lazy mounted too!</b-alert></b-tab>
</b-tabs>

<!-- b-tabs-lazy.vue -->

Keyboard navigation is enabled by default for ARIA compliance with tablists when a tab button has focus.

Keypress	Action
`Left` or `Up`	Activate the previous non-disabled tab
`Right` or `Down`	Activate the next non-disabled tab
`Shift`+`Left` or `Shift`+`Up`	Activate the first non-disabled tab
`Home`	Activate the first non-disabled tab
`Shift`+`Right` or `Shift`+`Down`	Activate the last non-disabled tab
`End`	Activate the last non-disabled tab
`Tab`	Move focus to the active tab content
`Shift`+`Tab`	Move focus to the previous control on the page

Disable keyboard navigation by setting the prop no-key-nav. Behavior will now default to regular browser navigation with TAB key.

Keypress	Action
`Tab`	Move to the next tab button or control on the page
`Shift`+`Tab`	Move to the previous tab button or control on the page
`Enter` or `Space`	Activate current focused button's tab

Programmatically activating and deactivating tabs

Use the <b-tabs> v-model to control which tab is active by setting the v-model to the index (zero-based) of the tab to be shown (see example below).

Alternatively, you can use the active prop on each <b-tab> with the .sync modifier to activate the tab, or to detect if a particular tab is active.

Each <b-tab> instance also provides two public methods to activate or deactivate the tab. The methods are .activate() and .deactivate(), respectively. If activation or deactivation fails (i.e. a tab is disabled or no tab is available to move activation to), then the currently active tab will remain active and the method will return false. You will need a reference to the <b-tab> in order to use these methods.

Preventing a `<b-tab>` from being activated

To prevent a tab from activating, simply set the disabled prop on the <b-tab> component.

Alternatively, you can listen for the activate-tab event, which provides an option to prevent the tab from activating. The activate-tab event is emitted with three arguments:

newTabIndex: The index of the tab that is going to be activated
prevTabIndex: The index of the currently active tab
bvEvent: The BvEvent object. Call bvEvt.preventDefault() to prevent newTabIndex from being activated

For accessibility reasons, when using the activate-tab event to prevent a tab from activating, you should provide some means of notification to the user as to why the tab is not able to be activated. It is recommended to use the disabled attribute on the <b-tab> component instead of using the activate-tab event (as disabled is more intuitive for screen reader users).

Advanced examples

External controls using `v-model`

<template>
  <div>
    <!-- Tabs with card integration -->
    <b-card no-body>
      <b-tabs v-model="tabIndex" small card>
        <b-tab title="General">I'm the first fading tab</b-tab>
        <b-tab title="Edit profile">
          I'm the second tab
          <b-card>I'm the card in tab</b-card>
        </b-tab>
        <b-tab title="Premium Plan" disabled>Sibzamini!</b-tab>
        <b-tab title="Info">I'm the last tab</b-tab>
      </b-tabs>
    </b-card>

    <!-- Control buttons-->
    <div class="text-center">
      <b-button-group class="mt-2">
        <b-button @click="tabIndex--">Previous</b-button>
        <b-button @click="tabIndex++">Next</b-button>
      </b-button-group>

      <div class="text-muted">Current Tab: {{ tabIndex }}</div>
    </div>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        tabIndex: 1
      }
    }
  }
</script>

<!-- b-tabs-controls.vue -->

Dynamic tabs + tabs-end slot

<template>
  <div>
    <b-card no-body>
      <b-tabs card>
        <!-- Render Tabs, supply a unique `key` to each tab -->
        <b-tab v-for="i in tabs" :key="'dyn-tab-' + i" :title="'Tab ' + i">
          Tab contents {{ i }}
          <b-button size="sm" variant="danger" class="float-right" @click="closeTab(i)">
            Close tab
          </b-button>
        </b-tab>

        <!-- New Tab Button (Using tabs-end slot) -->
        <template v-slot:tabs-end>
          <b-nav-item role="presentation" @click.prevent="newTab" href="#"><b>+</b></b-nav-item>
        </template>

        <!-- Render this if no tabs -->
        <template v-slot:empty>
          <div class="text-center text-muted">
            There are no open tabs<br>
            Open a new tab using the <b>+</b> button above.
          </div>
        </template>
      </b-tabs>
    </b-card>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        tabs: [],
        tabCounter: 0
      }
    },
    methods: {
      closeTab(x) {
        for (let i = 0; i < this.tabs.length; i++) {
          if (this.tabs[i] === x) {
            this.tabs.splice(i, 1)
          }
        }
      },
      newTab() {
        this.tabs.push(this.tabCounter++)
      }
    }
  }
</script>

<!-- b-tabs-dynamic.vue -->

Component reference

`<b-tabs>`

View source

<b-tabs> Properties
<b-tabs> v-model
<b-tabs> Slots
<b-tabs> Events

Properties

Property (Click to sort Ascending)	Type	Default	Description
`id`	`String`		Used to set the 'id' attribute on the rendered content, and used as the base to generate any additional element IDs as needed
`tag`	`String`	`'div'`	Specify the HTML tag to render instead of the default tag
`fill`	`Boolean`	`false`	Proportionately fills all horizontal space with nav items. All horizontal space is occupied, but not every nav item has the same width
`justified`	`Boolean`	`false`	Fills all horizontal space with nav items, but unlike 'fill', every nav item will be the same width
`align`	`String`		Align the nav items in the nav: 'start' (or 'left'), 'center', 'end' (or 'right')
`pills`	`Boolean`	`false`	Renders the nav items with the appearance of pill buttons
`vertical`	`Boolean`	`false`	Renders the tab controls vertically
`small`	`Boolean`	`false`	Makes the nav smaller
`card`	`Boolean`	`false`	When set to true, renders the tabs the the appropriate styles to be placed into a 'b-card'
`end`	`Boolean`	`false`	Place the tab controls at the bottom (horizontal tabs), or right (vertical tabs)
`no-fade`	`Boolean`	`false`	When set to 'true', disables the fade animation/transition on the component
`no-nav-style`	`Boolean`	`false`	Do not render the tab controls with tab styling
`no-key-nav`	`Boolean`	`false`	Disable keyboard navigation of the tab controls
`lazy`	`Boolean`	`false`	Lazily render the b-tab contents when shown
`content-class`	`String` or `Array` or `Object`		CSS class (or classes) to apply to the tab-content wrapper
`nav-class`	`String` or `Array` or `Object`		CSS class (or classes) to apply to the tablist (nav) wrapper
`nav-wrapper-class`	`String` or `Array` or `Object`		CSS class (or classes) to apply to the tab controls wrapper element
`active-nav-item-class`	`String` or `Array` or `Object`		CSS class (or classes) to apply to the active nav item tab control
`active-tab-class`	`String` or `Array` or `Object`		CSS class (or classes) to apply to the currently active tab
`value` v-model	`Number`	`null`	Currently visible tab index (zero-based)

`v-model`

Property	Event
`value`	`input`

Slots

Slot Name	Description
`tabs-start`	Additional tab buttons without tab content placed before content tab buttons
`tabs-end`	Additional tab buttons without tab content placed after content tab buttons
`empty`	Renders this slot if no tabs are present

Events

Event	Arguments	Description
`input`	`tabIndex` - Current selected tab index (0-based index)	Emitted when a tab is shown. Used to update the v-model
`activate-tab` v2.1.0+	`newTabIndex` - Tab being activated (0-based index) `prevTabIndex` - Tab that is currently active (0-based index). Will be -1 if no current active tab `bvEvt` - BvEvent object. Call bvEvt.preventDefault() to cancel	Emitted just before a tab is shown/activated. Cancelable
`changed`	`currentTabs` - Array of the current b-tab instances, in document order. `previousTabs` - Array of the previous b-tab instances, in document order.	Emitted when a tab is added, removed, or tabs are re-ordered

`<b-tab>`

View source

<b-tab> Properties
<b-tab> Slots
<b-tab> Events

Properties

Property (Click to sort Ascending)	Type	Default	Description
`id`	`String`		Used to set the 'id' attribute on the rendered content, and used as the base to generate any additional element IDs as needed
`active`	`Boolean`	`false`	When set to 'true', places the component in the active state with active styling
`tag`	`String`	`'div'`	Specify the HTML tag to render instead of the default tag
`button-id`	`String`		Use a specific ID for this tab's tab control button. If not provided, one will automatically be generated
`title`	`String`	`''`	Text content to place in the title
`title-item-class`	`String` or `Array` or `Object`		CSS class (or classes) to apply to the tab's control button 'li' element
`title-link-class`	`String` or `Array` or `Object`		CSS class (or classes) to apply to the tab's control button inner link element
`title-link-attributes` v2.6.0+	`Object`		Attributes to apply to the tab's control button inner link element
`disabled`	`Boolean`	`false`	When set to 'true', disables the component's functionality and places it in a disabled state
`no-body`	`Boolean`	`false`	When the parent b-tabs has the 'card' prop set, do not render a card-body wrapper
`lazy`	`Boolean`	`false`	Lazily render this tab's content when shown

Slots

Slot Name	Description
`title`	Slot for custom tab title

Events

Event	Arguments	Description
`click`	`evt` - Original event object	Emitted when a tab is clicked, or is activated by keyboard navigation

Importing individual components

You can import individual components into your project via the following named exports:

Component	Named Export	Import Path
`<b-tabs>`	`BTabs`	`bootstrap-vue`
`<b-tab>`	`BTab`	`bootstrap-vue`

Example:

import { BTabs } from 'bootstrap-vue'
Vue.component('b-tabs', BTabs)

Importing as a Vue.js plugin

This plugin includes all of the above listed individual components. Plugins also include any component aliases.

Named Export	Import Path
`TabsPlugin`	`bootstrap-vue`

Example:

import { TabsPlugin } from 'bootstrap-vue'
Vue.use(TabsPlugin)

Basic usage

Cards integration

Pills variant

Fill and justify

Fill

Justified

Alignment

Bottom placement of tab controls

Vertical tabs

Active classes

Fade animation

Add tabs without content

Add custom content to tab title

Apply custom classes to the generated nav-tabs or pills

Lazy loading tab content

Keyboard navigation

Programmatically activating and deactivating tabs

Preventing a <b-tab> from being activated

Advanced examples

External controls using v-model

Dynamic tabs + tabs-end slot

Component reference

Properties

v-model

Slots

Events

Properties

Slots

Events

Importing individual components

Importing as a Vue.js plugin

Preventing a `<b-tab>` from being activated

External controls using `v-model`

`v-model`