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When a DOM node is passed to an HTML tooltip, the `title` node is only moved if it is not already in the tooltip. Otherwise, `empty()` is used instead of `detach()` before appending the `title` to avoid memory leaks. If a DOM node is passed to a plain text tooltip, its text is copied via jQuery `.text()`. Replaces `.detach()` with `.empty()`, as `.detach()` is almost never useful but instead leaks memory. The difference between `empty` and `detach` is that the latter keeps all the attached jQuery events/data. However, since we do not return the previous children, the user would have to keep these themselves, thus they can `detach()` if necessary. This is a port of https://github.com/twbs/bootstrap/pull/14552 to v4.
12 KiB
| layout | title | group |
|---|---|---|
| docs | Tooltips | components |
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
- Will be replaced with the ToC, excluding the "Contents" header {:toc}
Overview
Things to know when using the tooltip plugin:
- Tooltips rely on 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
.disabledordisabledelements 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:
{% highlight js %} $(function () { $('[data-toggle="tooltip"]').tooltip() }) {% endhighlight %}
Examples
Hover over the links below to see tooltips:
Tight pants next level keffiyeh you probably haven't heard of them. Photo booth beard raw denim letterpress vegan messenger bag stumptown. Farm-to-table seitan, mcsweeney's fixie sustainable quinoa 8-bit american apparel have a terry richardson vinyl chambray. Beard stumptown, cardigans banh mi lomo thundercats. Tofu biodiesel williamsburg marfa, four loko mcsweeney's cleanse vegan chambray. A really ironic artisan whatever keytar, scenester farm-to-table banksy Austin twitter handle freegan cred raw denim single-origin coffee viral.
Static demo
Four options are available: top, right, bottom, and left aligned.
Interactive demo
Hover over the buttons below to see their tooltips.
{% highlight html %} {% endhighlight %}
Usage
The tooltip plugin generates content and markup on demand, and by default places tooltips after their trigger element.
Trigger the tooltip via JavaScript:
{% highlight js %} $('#example').tooltip(options) {% endhighlight %}
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).
{% highlight html %}
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 | false | false |
Appends the tooltip to a specific element. Example: |
| 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: |
| html | boolean | false | Insert HTML into 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 | auto. 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 |
| selector | string | false | If a selector is provided, popover 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
The outermost wrapper element should have the |
| title | string | element | function | '' |
Default title value if If a function is given, it will be called with its |
| 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 | 'hover focus' | An array of constraints - passed through to Tether. For more information refer to Tether's constraint docs. |
| offsets | string | '0 0' | Offset of the popover relative to it's target. For more information refer to Tether's offset docs. |
{% callout info %}
Data attributes for individual tooltips
Options for individual tooltips can alternatively be specified through the use of data attributes, as explained above. {% endcallout %}
Methods
$().tooltip(options)
Attaches a tooltip handler to an element collection.
.tooltip('show')
Reveals an element's tooltip. Returns to the caller before the tooltip has actually been shown (i.e. before the shown.bs.tooltip event occurs). This is considered a "manual" triggering of the tooltip. Tooltips with zero-length titles are never displayed.
{% highlight js %}$('#element').tooltip('show'){% endhighlight %}
.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.
{% highlight js %}$('#element').tooltip('hide'){% endhighlight %}
.tooltip('toggle')
Toggles an element's tooltip. Returns to the caller before the tooltip has actually been shown or hidden (i.e. before the shown.bs.tooltip or hidden.bs.tooltip event occurs). This is considered a "manual" triggering of the tooltip.
{% highlight js %}$('#element').tooltip('toggle'){% endhighlight %}
.tooltip('destroy')
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.
{% highlight js %}$('#element').tooltip('destroy'){% endhighlight %}
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). |
{% highlight js %} $('#myTooltip').on('hidden.bs.tooltip', function () { // do something… }) {% endhighlight %}