Looking to create a dynamic container that expands when a button/link is clicked? The challenge lies in achieving this expansion effect with a smooth transition. By using the height: auto property, the container can expand to fit its content, but incorporating a transition like transition: height 0.2s ease-in introduces some complications.
Incorporating this functionality into an Angular environment adds another layer of complexity, especially considering the dynamic nature of the content below the <ul>. So how can we effectively toggle the is-active CSS class based on the container's height?
Take a look at the code snippet below:
<div [ngClass]="toggleState ? 'container is-active' : 'container'">
<ul>
<li><a>Item 1</a></li>
<li><a>Item 2</a></li>
<li><a (click)="toggleState = !toggleState">Item 3</a></li>
</ul>
<div class="extra-dynamic-content">Lorem ipsum</div>
</div>
To control the container height and achieve the desired transition effect, use the following CSS:
.container {
height: 100px
}
.container .is-active {
height: 200px;