Tooltips

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

Overview

Things to know when using the tooltip plugin:

• Tooltips rely on the third party library Popper for positioning. You must include popper.min.js 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.

By default, this component uses the built-in content sanitizer, which strips out any HTML elements that are not explicitly allowed. See the sanitizer section in our JavaScript documentation for more details.

The animation effect of this component is dependent on the prefers-reduced-motion media query. See the reduced motion section of our accessibility documentation.

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:

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:

html

<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>

Feel free to use either title or data-bs-title in your HTML. When title is used, Popper will replace it automatically with data-bs-title when the element is rendered.

Custom tooltips

Added in v5.2.0

You can customize the appearance of tooltips using CSS 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.

site/assets/scss/_component-examples.scss

.custom-tooltip {
  --bs-tooltip-bg: var(--bd-violet-bg);
  --bs-tooltip-color: var(--bs-white);
}

html

<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.

<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:

<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:

CSS

Variables

Added in v5.2.0

As part of Bootstrap’s evolving CSS variables approach, tooltips now use local CSS variables on .tooltip for enhanced real-time customization. Values for the CSS variables are set via Sass, so Sass customization is still supported, too.

scss/_tooltip.scss

--#{$prefix}tooltip-zindex: #{$zindex-tooltip};
--#{$prefix}tooltip-max-width: #{$tooltip-max-width};
--#{$prefix}tooltip-padding-x: #{$tooltip-padding-x};
--#{$prefix}tooltip-padding-y: #{$tooltip-padding-y};
--#{$prefix}tooltip-margin: #{$tooltip-margin};
@include rfs($tooltip-font-size, --#{$prefix}tooltip-font-size);
--#{$prefix}tooltip-color: #{$tooltip-color};
--#{$prefix}tooltip-bg: #{$tooltip-bg};
--#{$prefix}tooltip-border-radius: #{$tooltip-border-radius};
--#{$prefix}tooltip-opacity: #{$tooltip-opacity};
--#{$prefix}tooltip-arrow-width: #{$tooltip-arrow-width};
--#{$prefix}tooltip-arrow-height: #{$tooltip-arrow-height};

Sass variables

scss/_variables.scss

$tooltip-font-size:                 $font-size-sm;
$tooltip-max-width:                 200px;
$tooltip-color:                     var(--#{$prefix}body-bg);
$tooltip-bg:                        var(--#{$prefix}emphasis-color);
$tooltip-border-radius:             var(--#{$prefix}border-radius);
$tooltip-opacity:                   .9;
$tooltip-padding-y:                 $spacer * .25;
$tooltip-padding-x:                 $spacer * .5;
$tooltip-margin:                    null; // TODO: remove this in v6
$tooltip-arrow-width:               .8rem;
$tooltip-arrow-height:              .4rem;
// fusv-disable
$tooltip-arrow-color:               null; // Deprecated in Bootstrap 5.2.0 for CSS variables
// fusv-enable

Usage

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

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

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 (for the flip modifier using the popperConfig option) to any HTMLElement to override the default value, 'clippingParents', such as document.body:

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

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).

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.

<!-- 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".

html

<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

As options can be passed via data attributes or JavaScript, you can append an option name to data-bs-, as in data-bs-animation="{value}". Make sure to change the case type of the option name from “camelCase” to “kebab-case” when passing the options via data attributes. For example, use data-bs-custom-class="beautifier" instead of data-bs-customClass="beautifier".

As of Bootstrap 5.2.0, all components support an experimental reserved data attribute data-bs-config that can house simple component configuration as a JSON string. When an element has data-bs-config='{"delay":0, "title":123}' and data-bs-title="456" attributes, the final title value will be 456 and the separate data attributes will override values given on data-bs-config. In addition, existing data attributes are able to house JSON values like data-bs-delay='{"show":0,"hide":150}'.

The final configuration object is the merged result of data-bs-config, data-bs-, and js object where the latest given key-value overrides the others.

Note that for security reasons the sanitize, sanitizeFn, and allowList options cannot be supplied using data attributes.

Data attributes for individual tooltips

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

Using function with popperConfig

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

Methods

All API methods are asynchronous and start a transition. They return to the caller as soon as the transition is started, but before it ends. In addition, a method call on a transitioning component will be ignored. Learn more in our JavaScript docs.

const tooltip = bootstrap.Tooltip.getInstance('#example') // Returns a Bootstrap tooltip instance
// setContent example
tooltip.setContent({ '.tooltip-inner': 'another title' })

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

Events

const myTooltipEl = document.getElementById('myTooltip')
const tooltip = bootstrap.Tooltip.getOrCreateInstance(myTooltipEl)
myTooltipEl.addEventListener('hidden.bs.tooltip', () => {
  // do something...
})
tooltip.hide()