bootstrap/site/src/content/docs/components/tooltips.mdx

---
title: Tooltips
description: Documentation and examples for adding custom Bootstrap tooltips with CSS and JavaScript using CSS3 for animations and data-bs-attributes for local title storage.
toc: true
---

## Overview

Things to know when using the tooltip plugin:

- Tooltips rely on the third party library [Popper](https://popper.js.org/docs/v2/) for positioning. You must include [popper.min.js]([[config:cdn.popper]]) before `bootstrap.js`, or use one `bootstrap.bundle.min.js` which contains Popper.
- Tooltips are opt-in for performance reasons, so **you must initialize them yourself**.
- Tooltips with zero-length titles are never displayed.
- Specify `container: 'body'` to avoid rendering problems in more complex components (like our input groups, button groups, etc).
- Triggering tooltips on hidden elements will not work.
- Tooltips for `.disabled` or `disabled` elements must be triggered on a wrapper element.
- When triggered from hyperlinks that span multiple lines, tooltips will be centered. Use `white-space: nowrap;` on your `<a>`s to avoid this behavior.
- Tooltips must be hidden before their corresponding elements have been removed from the DOM.
- Tooltips can be triggered thanks to an element inside a shadow DOM.

Got all that? Great, let’s see how they work with some examples.

<Callout name="info-sanitizer" />

<Callout name="info-prefersreducedmotion" />

## Examples

### Enable tooltips

As mentioned above, you must initialize tooltips before they can be used. One way to initialize all tooltips on a page would be to select them by their `data-bs-toggle` attribute, like so:

```js
const tooltipTriggerList = document.querySelectorAll('[data-bs-toggle="tooltip"]')
const tooltipList = [...tooltipTriggerList].map(tooltipTriggerEl => new bootstrap.Tooltip(tooltipTriggerEl))
```

### Tooltips on links

Hover over the links below to see tooltips:

<Example addStackblitzJs class="tooltip-demo" code={`<p class="muted">Placeholder text to demonstrate some <a href="#" data-bs-toggle="tooltip" data-bs-title="Default tooltip">inline links</a> with tooltips. This is now just filler, no killer. Content placed here just to mimic the presence of <a href="#" data-bs-toggle="tooltip" data-bs-title="Another tooltip">real text</a>. And all that just to give you an idea of how tooltips would look when used in real-world situations. So hopefully you’ve now seen how <a href="#" data-bs-toggle="tooltip" data-bs-title="Another one here too">these tooltips on links</a> can work in practice, once you use them on <a href="#" data-bs-toggle="tooltip" data-bs-title="The last tip!">your own</a> site or project.</p>`} />

<Callout name="warning-data-bs-title-vs-title" type="warning" />

### Custom tooltips

You can customize the appearance of tooltips using [CSS variables](#variables). We set a custom class with `data-bs-custom-class="custom-tooltip"` to scope our custom appearance and use it to override a local CSS variable.

<ScssDocs name="custom-tooltip" file="site/src/scss/_component-examples.scss" />

<Example addStackblitzJs class="tooltip-demo" code={`<button type="button" class="btn btn-secondary"
          data-bs-toggle="tooltip" data-bs-placement="top"
          data-bs-custom-class="custom-tooltip"
          data-bs-title="This top tooltip is themed via CSS variables.">
    Custom tooltip
  </button>`} />

### Directions

Hover over the buttons below to see the four tooltips directions: top, right, bottom, and left. Directions are mirrored when using Bootstrap in RTL.

<Example showMarkup={false} class="tooltip-demo" code={`<div class="bd-example-tooltips">
    <button type="button" class="btn btn-secondary" data-bs-toggle="tooltip" data-bs-placement="top" data-bs-title="Tooltip on top">Tooltip on top</button>
    <button type="button" class="btn btn-secondary" data-bs-toggle="tooltip" data-bs-placement="right" data-bs-title="Tooltip on right">Tooltip on right</button>
    <button type="button" class="btn btn-secondary" data-bs-toggle="tooltip" data-bs-placement="bottom" data-bs-title="Tooltip on bottom">Tooltip on bottom</button>
    <button type="button" class="btn btn-secondary" data-bs-toggle="tooltip" data-bs-placement="left" data-bs-title="Tooltip on left">Tooltip on left</button>
    <button type="button" class="btn btn-secondary" data-bs-toggle="tooltip" data-bs-html="true" data-bs-title="<em>Tooltip</em> <u>with</u> <b>HTML</b>">Tooltip with HTML</button>
  </div>`} />

```html
<button type="button" class="btn btn-secondary" data-bs-toggle="tooltip" data-bs-placement="top" data-bs-title="Tooltip on top">
  Tooltip on top
</button>
<button type="button" class="btn btn-secondary" data-bs-toggle="tooltip" data-bs-placement="right" data-bs-title="Tooltip on right">
  Tooltip on right
</button>
<button type="button" class="btn btn-secondary" data-bs-toggle="tooltip" data-bs-placement="bottom" data-bs-title="Tooltip on bottom">
  Tooltip on bottom
</button>
<button type="button" class="btn btn-secondary" data-bs-toggle="tooltip" data-bs-placement="left" data-bs-title="Tooltip on left">
  Tooltip on left
</button>
```

And with custom HTML added:

```html
<button type="button" class="btn btn-secondary" data-bs-toggle="tooltip" data-bs-html="true" data-bs-title="<em>Tooltip</em> <u>with</u> <b>HTML</b>">
  Tooltip with HTML
</button>
```

With an SVG:

<div class="bd-example tooltip-demo">
  <a href="#" class="d-inline-block" data-bs-toggle="tooltip" data-bs-title="Default tooltip" aria-label="Hover or focus to see default tooltip">
    <svg xmlns="http://www.w3.org/2000/svg" width="50" height="50" viewBox="0 0 100 100" aria-hidden="true">
      <rect width="100%" height="100%" fill="#563d7c"/>
      <circle cx="50" cy="50" r="30" fill="#007bff"/>
    </svg>
  </a>
</div>

## CSS

### Variables

<CSSVariables component="Tooltips" className="tooltip" />

<ScssDocs name="tooltip-css-vars" file="scss/_tooltip.scss" />

### Sass variables

<ScssDocs name="tooltip-variables" file="scss/_tooltip.scss" />

## Usage

The tooltip plugin generates content and markup on demand, and by default places tooltips after their trigger element. Trigger the tooltip via JavaScript:

```js
const exampleEl = document.getElementById('example')
const tooltip = new bootstrap.Tooltip(exampleEl, options)
```

<Callout type="warning">
Tooltips automatically attempt to change positions when a parent container has `overflow: auto` or `overflow: scroll`, but still keeps the original placement’s positioning. Set the [`boundary` option](https://popper.js.org/docs/v2/modifiers/flip/#boundary) (for the flip modifier using the `popperConfig` option) to any HTMLElement to override the default value, `'clippingParents'`, such as `document.body`:

```js
const tooltip = new bootstrap.Tooltip('#example', {
  boundary: document.body // or document.querySelector('#boundary')
})
```

</Callout>

### Markup

The required markup for a tooltip is only a `data` attribute and `title` on the HTML element you wish to have a tooltip. The generated markup of a tooltip is rather simple, though it does require a position (by default, set to `top` by the plugin).

<Callout type="warning">
**Keep tooltips accessible to keyboard and assistive technology users** by only adding them to HTML elements that are traditionally keyboard-focusable and interactive (such as links or form controls). While other HTML elements can be made focusable by adding `tabindex="0"`, this can create annoying and confusing tab stops on non-interactive elements for keyboard users, and most assistive technologies currently do not announce tooltips in this situation. Additionally, do not rely solely on `hover` as the trigger for your tooltips as this will make them impossible to trigger for keyboard users.
</Callout>

```html
<!-- HTML to write -->
<a href="#" data-bs-toggle="tooltip" data-bs-title="Some tooltip text!">Hover over me</a>

<!-- Generated markup by the plugin -->
<div class="tooltip bs-tooltip-auto" role="tooltip">
  <div class="tooltip-arrow"></div>
  <div class="tooltip-inner">
    Some tooltip text!
  </div>
</div>
```

### Disabled elements

Elements with the `disabled` attribute aren’t interactive, meaning users cannot focus, hover, or click them to trigger a tooltip (or popover). As a workaround, you’ll want to trigger the tooltip from a wrapper `<div>` or `<span>`, ideally made keyboard-focusable using `tabindex="0"`.

<Example class="tooltip-demo" addStackblitzJs code={`<span class="d-inline-block" tabindex="0" data-bs-toggle="tooltip" data-bs-title="Disabled tooltip">
    <button class="btn btn-primary" type="button" disabled>Disabled button</button>
  </span>`} />

### Options

<JsDataAttributes />

<Callout type="warning">
Note that for security reasons the `sanitize`, `sanitizeFn`, and `allowList` options cannot be supplied using data attributes.
</Callout>

<BsTable>
| Name | Type | Default | Description |
| --- | --- | --- | --- |
| `allowList` | object | [Default value]([[docsref:/getting-started/javascript#sanitizer]]) | An object containing allowed tags and attributes. Those not explicitly allowed will be removed by [the content sanitizer]([[docsref:/getting-started/javascript#sanitizer]]). <Callout type="warning">**Exercise caution when adding to this list.** Refer to [OWASP’s Cross Site Scripting Prevention Cheat Sheet](https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html) for more information.</Callout> |
| `animation` | boolean | `true` | Apply a CSS fade transition to the tooltip. |
| `boundary` | string, element | `'clippingParents'` | Overflow constraint boundary of the tooltip (applies only to Popper’s preventOverflow modifier). By default, it’s `'clippingParents'` and can accept an HTMLElement reference (via JavaScript only). For more information refer to Popper’s [detectOverflow docs](https://popper.js.org/docs/v2/utils/detect-overflow/#boundary). |
| `container` | string, element, false | `false` | Appends the tooltip to a specific element. Example: `container: 'body'`. This option is particularly useful in that it allows you to position the tooltip in the flow of the document near the triggering element -&nbsp;which will prevent the tooltip from floating away from the triggering element during a window resize. |
| `customClass` | string, function | `''` | Add classes to the tooltip when it is shown. Note that these classes will be added in addition to any classes specified in the template. To add multiple classes, separate them with spaces: `'class-1 class-2'`. You can also pass a function that should return a single string containing additional class names. |
| `delay` | number, object | `0` | Delay showing and hiding the tooltip (ms)—doesn’t apply to manual trigger type. If a number is supplied, delay is applied to both hide/show. Object structure is: `delay: { "show": 500, "hide": 100 }`. |
| `fallbackPlacements` | array | `['top', 'right', 'bottom', 'left']` | Define fallback placements by providing a list of placements in array (in order of preference). For more information refer to Popper’s [behavior docs](https://popper.js.org/docs/v2/modifiers/flip/#fallbackplacements). |
| `html` | boolean | `false` | Allow HTML in the tooltip. If true, HTML tags in the tooltip’s `title` will be rendered in the tooltip. If false, `innerText` property will be used to insert content into the DOM. Prefer text when dealing with user-generated input to [prevent XSS attacks](https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html). |
| `offset` | array, string, function | `[0, 6]` | Offset of the tooltip relative to its target. You can pass a string in data attributes with comma separated values like: `data-bs-offset="10,20"`. When a function is used to determine the offset, it is called with an object containing the popper placement, the reference, and popper rects as its first argument. The triggering element DOM node is passed as the second argument. The function must return an array with two numbers: [skidding](https://popper.js.org/docs/v2/modifiers/offset/#skidding-1), [distance](https://popper.js.org/docs/v2/modifiers/offset/#distance-1). For more information refer to Popper’s [offset docs](https://popper.js.org/docs/v2/modifiers/offset/#options). |
| `placement` | string, function | `'top'` | How to position the tooltip: auto, top, bottom, left, right. When `auto` is specified, it will dynamically reorient the tooltip. When a function is used to determine the placement, it is called with the tooltip DOM node as its first argument and the triggering element DOM node as its second. The `this` context is set to the tooltip instance. |
| `popperConfig` | null, object, function | `null` | To change Bootstrap’s default Popper config, see [Popper’s configuration](https://popper.js.org/docs/v2/constructors/#options). When a function is used to create the Popper configuration, it’s called with an object that contains the Bootstrap’s default Popper configuration. It helps you use and merge the default with your own configuration. The function must return a configuration object for Popper. |
| `sanitize` | boolean | `true` | Enable [content sanitization]([[docsref:/getting-started/javascript#sanitizer]]). If true, the `template`, `content` and `title` options will be sanitized. <Callout type="warning">**Exercise caution when disabling content sanitization.** Refer to [OWASP’s Cross Site Scripting Prevention Cheat Sheet](https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html) for more information. Vulnerabilities caused solely by disabling content sanitization are not considered within scope for Bootstrap’s security model.</Callout> |
| `sanitizeFn` | null, function | `null` | Provide an alternative [content sanitization]([[docsref:/getting-started/javascript#sanitizer]]) function. This can be useful if you prefer to use a dedicated library to perform sanitization. |
| `selector` | string, false | `false` | If a selector is provided, tooltip objects will be delegated to the specified targets. In practice, this is used to also apply tooltips to dynamically added DOM elements (`jQuery.on` support). See [this issue]([[config:repo]]/issues/4215) and [an informative example](https://codepen.io/Johann-S/pen/djJYPb). **Note**: `title` attribute must not be used as a selector. |
| `template` | string | `'<div class="tooltip" role="tooltip"><div class="tooltip-arrow"></div><div class="tooltip-inner"></div></div>'` | Base HTML to use when creating the tooltip. The tooltip’s `title` will be injected into the `.tooltip-inner`. `.tooltip-arrow` will become the tooltip’s arrow. The outermost wrapper element should have the `.tooltip` class and `role="tooltip"`. |
| `title` | string, element, function | `''` | The tooltip title. If a function is given, it will be called with its `this` reference set to the element that the popover is attached to. |
| `trigger` | string | `'hover focus'` | How tooltip is triggered: click, hover, focus, manual. You may pass multiple triggers; separate them with a space. `'manual'` indicates that the tooltip will be triggered programmatically via the `.tooltip('show')`, `.tooltip('hide')` and `.tooltip('toggle')` methods; this value cannot be combined with any other trigger. `'hover'` on its own will result in tooltips that cannot be triggered via the keyboard, and should only be used if alternative methods for conveying the same information for keyboard users is present. |
</BsTable>

<Callout>
#### Data attributes for individual tooltips

Options for individual tooltips can alternatively be specified through the use of data attributes, as explained above.
</Callout>

#### Using function with `popperConfig`

```js
const tooltip = new bootstrap.Tooltip(element, {
  popperConfig(defaultBsPopperConfig) {
    // const newPopperConfig = {...}
    // use defaultBsPopperConfig if needed...
    // return newPopperConfig
  }
})
```

### Methods

<Callout name="danger-async-methods" type="danger" />

<BsTable>
| Method | Description |
| --- | --- |
| `disable` | Removes the ability for an element’s tooltip to be shown. The tooltip will only be able to be shown if it is re-enabled. |
| `dispose` | Hides and destroys an element’s tooltip (Removes stored data on the DOM element). Tooltips that use delegation (which are created using [the `selector` option](#options)) cannot be individually destroyed on descendant trigger elements. |
| `enable` | Gives an element’s tooltip the ability to be shown. **Tooltips are enabled by default.** |
| `getInstance` | *Static* method which allows you to get the tooltip instance associated with a DOM element. |
| `getOrCreateInstance` | *Static* method which allows you to get the tooltip instance associated with a DOM element, or create a new one in case it wasn’t initialized. |
| `hide` | Hides an element’s tooltip. **Returns to the caller before the tooltip has actually been hidden** (i.e. before the `hidden.bs.tooltip` event occurs). This is considered a “manual” triggering of the tooltip. |
| `setContent` | Gives a way to change the tooltip’s content after its initialization. |
| `show` | Reveals an element’s tooltip. **Returns to the caller before the tooltip has actually been shown** (i.e. before the `shown.bs.tooltip` event occurs). This is considered a “manual” triggering of the tooltip. Tooltips with zero-length titles are never displayed. |
| `toggle` | Toggles an element’s tooltip. **Returns to the caller before the tooltip has actually been shown or hidden** (i.e. before the `shown.bs.tooltip` or `hidden.bs.tooltip` event occurs). This is considered a “manual” triggering of the tooltip. |
| `toggleEnabled` | Toggles the ability for an element’s tooltip to be shown or hidden. |
| `update` | Updates the position of an element’s tooltip. |
</BsTable>

```js
const tooltip = bootstrap.Tooltip.getInstance('#example') // Returns a Bootstrap tooltip instance

// setContent example
tooltip.setContent({ '.tooltip-inner': 'another title' })
```

<Callout>
The `setContent` method accepts an `object` argument, where each property-key is a valid `string` selector within the tooltip template, and each related property-value can be `string` | `element` | `function` | `null`
</Callout>

### Events

<BsTable>
| Event | Description |
| --- | --- |
| `hide.bs.tooltip` | This event is fired immediately when the `hide` instance method has been called. |
| `hidden.bs.tooltip` | This event is fired when the tooltip has finished being hidden from the user (will wait for CSS transitions to complete). |
| `inserted.bs.tooltip` | This event is fired after the `show.bs.tooltip` event when the tooltip template has been added to the DOM. |
| `show.bs.tooltip` | This event fires immediately when the `show` instance method is called. |
| `shown.bs.tooltip` | This event is fired when the tooltip has been made visible to the user (will wait for CSS transitions to complete). |
</BsTable>

```js
const myTooltipEl = document.getElementById('myTooltip')
const tooltip = bootstrap.Tooltip.getOrCreateInstance(myTooltipEl)

myTooltipEl.addEventListener('hidden.bs.tooltip', () => {
  // do something...
})

tooltip.hide()
```