Tooltips
Inspired by the excellent Tipsy jQuery plugin written by Jason Frame. Tooltips are an updated version, which don’t rely on images, use CSS3 for animations, and data-attributes for local title storage.
Contents
Overview
Things to know when using the tooltip plugin:
- Tooltips rely on the 3rd party library Tether for positioning. You must include tether.min.js before bootstrap.js in order for tooltips to work!
- 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
ordisabled
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.
Got all that? Great, let’s see how they work with some examples.
Example: Enable tooltips everywhere
One way to initialize all tooltips on a page would be to select them by their data-toggle
attribute:
$(function () { $('[data-toggle="tooltip"]').tooltip() })
Examples
Hover over the links below to see tooltips:
Open example on getbootstrap.com
Static demo
Four options are available: top, right, bottom, and left aligned.
Open example on getbootstrap.com
Interactive demo
Hover over the buttons below to see their tooltips.
<button type="button" class="btn btn-secondary" data-toggle="tooltip" data-placement="top" title="Tooltip on top"> Tooltip on top </button> <button type="button" class="btn btn-secondary" data-toggle="tooltip" data-placement="right" title="Tooltip on right"> Tooltip on right </button> <button type="button" class="btn btn-secondary" data-toggle="tooltip" data-placement="bottom" title="Tooltip on bottom"> Tooltip on bottom </button> <button type="button" class="btn btn-secondary" data-toggle="tooltip" data-placement="left" title="Tooltip on left"> Tooltip on left </button>
And with custom HTML added:
<button type="button" class="btn btn-secondary" data-toggle="tooltip" data-html="true" title="<em>Tooltip</em> <u>with</u> <b>HTML</b>"> Tooltip with HTML </button>
Usage
The tooltip plugin generates content and markup on demand, and by default places tooltips after their trigger element.
Trigger the tooltip via JavaScript:
$('#example').tooltip(options)
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).
Making tooltips work for keyboard and assistive technology users
You should only add tooltips to HTML elements that are traditionally keyboard-focusable and interactive (such as links or form controls). Although arbitrary HTML elements (such as <span>
s) can be made focusable by adding the tabindex="0"
attribute, this will add potentially annoying and confusing tab stops on non-interactive elements for keyboard users. In addition, most assistive technologies currently do not announce the tooltip in this situation.
<!-- HTML to write --> <a href="#" data-toggle="tooltip" title="Some tooltip text!">Hover over me</a> <!-- Generated markup by the plugin --> <div class="tooltip tooltip-top" role="tooltip"> <div class="tooltip-arrow"></div> <div class="tooltip-inner"> Some tooltip text! </div> </div>
Options
Options can be passed via data attributes or JavaScript. For data attributes, append the option name to data-
, as in data-animation=""
.
Name Type Default Description
animation boolean true Apply a CSS fade transition to the tooltip 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 - which will prevent the tooltip from floating away from the triggering element during a window resize.
delay number | object 0
Delay showing and hiding the tooltip (ms) - does not 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 }
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, jQuery's text
method will be used to insert content into the DOM.
Use text if you're worried about XSS attacks.
placement string | function 'top'
How to position the tooltip - top | bottom | left | right.
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.
selector string false If a selector is provided, tooltip objects will be delegated to the specified targets. In practice, this is used to enable dynamic HTML content to have popovers added. See this and an informative example. 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.
title string | element | function ''
Default title value if title
attribute isn't present.
If a function is given, it will be called with its this
reference set to the element that the tooltip 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` cannot be combined with any other trigger. constraints Array [] An array of constraints - passed through to Tether. For more information refer to Tether's constraint docs. offset string '0 0' Offset of the tooltip relative to its target. For more information refer to Tether's offset docs.
Data attributes for individual tooltips
Options for individual tooltips can alternatively be specified through the use of data attributes, as explained above.
Methods
$().tooltip(options)
Attaches a tooltip handler to an element collection.
.tooltip('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.
$('#element').tooltip('show')
.tooltip('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.
$('#element').tooltip('hide')
.tooltip('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.
$('#element').tooltip('toggle')
.tooltip('dispose')
Hides and destroys an element’s tooltip. Tooltips that use delegation (which are created using the selector
option) cannot be individually destroyed on descendant trigger elements.
$('#element').tooltip('dispose')
Events
Event Type Description
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). 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).
$('#myTooltip').on('hidden.bs.tooltip', function () { // do something… })
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