// Tutorial //

Animation Callbacks in Angular

Published on January 9, 2017
Default avatar
By Alligator.io
Developer and author at DigitalOcean.
Animation Callbacks in Angular

While we believe that this content benefits our community, we have not yet thoroughly reviewed it. If you have any suggestions for improvements, please let us know by clicking the “report an issue“ button at the bottom of the tutorial.

We’ve touched on the basics of animation in Angular, so let’s now explore another feature of the animation system: animation callbacks. You can use the start and done callbacks to setup hook methods that get called at the start or end of animations.

This post discusses the animation system in Angular 2 and up.

Let’s start with markup like this, where our animation trigger is called itemAnim:

<ul *ngIf="items">
  <li *ngFor="let item of items"
      (click)="removeItem(item)"
      [@itemAnim]>{{ item }}</li>
</ul>

We can add callbacks with the following syntax:

<ul *ngIf="items">
  <li *ngFor="let item of items"
      (click)="removeItem(item)"
      [@itemAnim]
      (@itemAnim.start)="animStart($event)"
      (@itemAnim.done)="animEnd($event)">{{ item }}</li>
</ul>

The callbacks receive an AnimationTransitionEvent event that contains the following properties: fromState, phaseName (“start” or “done”), toState and totalTime.

In the component we can now define the callback methods:

// ...

animStart(event) {
  console.log('Animation Started');
  // do more stuff
}

animEnd(event) {
  console.log('Animation Ended');
  // do more stuff
}

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in our Questions & Answers section, find tutorials and tools that will help you grow as a developer and scale your project or business, and subscribe to topics of interest.

Sign up
About the authors
Default avatar
Developer and author at DigitalOcean.

Still looking for an answer?

Was this helpful?
Leave a comment

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!