Angular Bootstrap collapse
Bootstrap collapse plugin allows you to toggle content on your pages with a bit of JavaScript and some classes. A flexible plugin that utilizes a handful of classes for easy toggle behavior.
Basic examples
Add
(click)="test.toggle()" mdbWavesEffect to the
button tag.
Place the collapse content
<div> in the parent
<div> and add
[collapse]="isCollapsed" #test="bs-collapse" inside.
Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.
<button mdbBtn color="primary" class="waves-light" type="button" (click)="test.toggle()" mdbWavesEffect>
Toggle collapse
</button>
<div class="" [mdbCollapse]="isCollapsed" #test="bs-collapse">
<p>Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.</p>
</div>
Collapse visible after view init
Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.
Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica,
craft beer labore wes anderson cred nesciunt sapiente ea proident.
import { CollapseDirective } from 'your-path/to/collapse.directive';
import { Component, ViewChildren, AfterViewInit } from '@angular/core';
@Component({
selector: 'visible-collapse',
templateUrl: './visible-collapse.component.html',
styleUrls: ['./visible-collapse.component.scss'],
})
export class VisibleCollapseComponent implements AfterViewInit {
@ViewChildren(CollapseDirective) collapses: CollapseDirective[];
ngAfterViewInit() {
this.collapses.forEach((collapse: CollapseDirective) => {
collapse.show();
});
}
}
Collapse events
| Event Type | Description |
|---|---|
| (showBsCollapse)="showBsCollapse()" | This event fires immediately when the
show instance method is called. |
| (shownBsCollapse)="shownBsCollapse()" | This event is fired when a collapse element has been made visible to the user (will wait for CSS transitions to complete). |
| (hideBsCollapse)="hideBsCollapse()" |
This event is fired immediately when the
hide method has been called.
|
| (hiddenBsCollapse)="hiddenBsCollapse()" | This event is fired when a collapse element has been hidden from the user (will wait for CSS transitions to complete). |
Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.
import { Component } from '@angular/core';
@Component({
selector: 'collapse-example',
templateUrl: 'collapse-example.html',
})
export class CollapseExampleComponent {
showBsCollapse(event: any) { console.log(event); }
shownBsCollapse(event: any) { console.log(event); }
hideBsCollapse(event: any) { console.log(event); }
hiddenBsCollapse(event: any) { console.log(event); }
}
Accessibility
Be sure to add
aria-expanded to the control element. This attribute explicitly defines the current state of the collapsible
element to screen readers and similar assistive technologies. If the collapsible element is closed by default, it should
have a value of
aria-expanded="false". If you’ve set the collapsible element to be open by default using the
in class, set
aria-expanded="true" on the control instead. The plugin will automatically toggle this attribute based on whether
or not the collapsible element has been opened or closed.
Additionally, if your control element is targeting a single collapsible element – i.e. the
data-target attribute is pointing to an
id selector – you may add an additional
aria-controls attribute to the control element, containing the
id of the collapsible element. Modern screen readers and similar assistive technologies make use of this attribute
to provide users with additional shortcuts to navigate directly to the collapsible element itself.
Accordion MDB Pro component
Extend the default collapse behavior to create an accordion.
{{ item.title }}
{{ item.description }}
import { Component } from '@angular/core';
@Component({
selector: 'accordion-example',
templateUrl: 'accordion-example.html',
})
export class AccordionExampleComponent {
public itemsList:Object[] = [
{
title: 'Collapsible Group Item #1',
description: 'Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven\'t heard of them accusamus labore sustainable VHS.'
},
{
title: 'Collapsible Group Item #2',
description: 'Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven\'t heard of them accusamus labore sustainable VHS.'
},
{
title: 'Collapsible Group Item #3',
description: 'Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven\'t heard of them accusamus labore sustainable VHS.'
}
]
}
Accordion Options
| Field name | Type | Default | Description |
|---|---|---|---|
| multiple | Boolean | True | This attribute enable/disable the multiple item expanded at the same time. |
| collapsed | Boolean | True | This attribute enable/disable collapse from the beginning when component is rendered. |
API Reference:
In order to speed up your application, you can choose to import only the modules you actually need, instead of importing the entire MDB Angular library. Remember that importing the entire library, and immediately afterwards a specific module, is bad practice, and can cause application errors.
API Reference for MDB Angular Collapse:
// For MDB Angular Pro
import { CollapseModule, WavesModule } from 'ng-uikit-pro-standard'// For MDB Angular Pro Accordion
import { AccordionModule, WavesModule } from 'ng-uikit-pro-standard'// For MDB Angular Free
import { CollapseModule, WavesModule } from 'angular-bootstrap-md'