Bootstrap 4 JS Collapse
Collapse CSS Classes
For a tutorial about Collapsibles, read our Bootstrap Collapse Tutorial.
| Class | Description | Example |
|---|---|---|
.collapse |
Hides the content | Try it |
.collapse show |
Shows the collapsible content by default | Try it |
.collapsing |
Added when the transition starts, and removed when it finishes | Try it |
Via data-* Attributes
Just add data-toggle="collapse" and a data-target to element to automatically
assign control of a collapsible element. The data-target attribute accepts a CSS
selector to apply the collapse to. Be sure to add the class collapse to the
collapsible element. If you'd like it to default open, add the additional class
"show".
Example
<button class="btn" data-toggle="collapse" data-target="#demo">Collapsible</button>
<div id="demo" class="collapse">
Some text..
</div>
Try it Yourself »
Tip: To add accordion-like group management to a collapsible control, add the data attribute data-parent="#selector".
Via JavaScript
Enable manually with:
$('.collapse').collapse()
Collapse Options
Options can be passed via data attributes or JavaScript. For data attributes, append the option name to data-, as in data-parent="".
| Name | Type | Default | Description | Try it |
|---|---|---|---|---|
| parent | selector | false | All collapsible elements under the specified parent will be closed when this collapsible item is shown. (similar to traditional accordion behavior) | Try it |
| toggle | boolean | true | Toggles the collapsible element on invocation | Try it |
Collapse Methods
The following table lists all available collapse methods.
| Method | Description | Try it |
|---|---|---|
| .collapse(options) | Activates the collapsible element with an option. See options above for valid values | |
| .collapse("toggle") | Toggles the collapsible element | Try it |
| .collapse("show") | Shows the collapsible element | Try it |
| .collapse("hide") | Hides the collapsible element | Try it |
| .collapse("dispose") | Destroys the collapsible element |
Collapse Events
The following table lists all available collapse events.
| Event | Description | Try it |
|---|---|---|
| show.bs.collapse | Occurs when the collapsible element is about to be shown | Try it |
| shown.bs.collapse | Occurs when the collapsible element is fully shown (after CSS transitions have completed) | Try it |
| hide.bs.collapse | Occurs when the collapsible element is about to be hidden | Try it |
| hidden.bs.collapse | Occurs when the collapsible element is fully hidden (after CSS transitions have completed) | Try it |