Introduction

This tutorial aims to introduce you to creating basic animations in Angular, a popular web application framework developed by Google. By the end of this tutorial, you'll learn how to setup Angular animations and implement them on your web page.

You will learn:
- The basics of Angular animations
- How to set up Angular animations
- How to use Angular animations in your web page

Prerequisites:
- Basic understanding of Angular
- Basic understanding of TypeScript

Step-by-Step Guide

In Angular, animations are built on top of the standard Web Animations API and run natively on browsers that support it. To start using animations in Angular, we first need to import the animation functions from @angular/animations.

import { trigger, state, style, animate, transition } from '@angular/animations';

• trigger: This function lets you define an animation trigger
• state: This function allows you to define different states for an animation
• style: This function allows you to define styles for states and transitions
• animate: This function lets you define the timings and any easing
• transition: This function allows you to define animation transitions between states

Code Examples

Let's start by creating a simple fade-in and fade-out animation.

import { Component } from '@angular/core';
import { trigger, state, style, animate, transition } from '@angular/animations';

@Component({
  selector: 'my-app',
  template: `
    <div [@fadeInOut]="state" (click)="toggleState()">
      Click me to toggle state
    </div>
  `,
  animations: [
    trigger('fadeInOut', [
      state('void', style({
        opacity: 0
      })),
      transition('void <=> *', animate(500)),
    ])
  ]
})
export class AppComponent {
  state: string = 'default';

  toggleState() {
    this.state = this.state === 'default' ? 'void' : 'default';
  }
}

In this example:
- We define an animation trigger fadeInOut.
- The void state is styled with opacity: 0.
- We define a transition between void and * (anything), with an animation duration of 500ms.
- toggleState() method toggles the state between default and void.

Summary

In this tutorial, we have:
- Introduced Angular animations
- Learned how to set up Angular animations
- Used Angular animations in a web page

To continue learning, you can explore more complex animations and how to combine multiple animations. The official Angular animations guide is an excellent resource for this.

Practice Exercises

1. Exercise 1: Create an animation that changes the background color of a div when clicked.
2. Exercise 2: Create an animation that moves a div from left to right over 2 seconds.
3. Exercise 3: Combine the animations from exercises 1 and 2.

Solutions:
1. Solution 1:
typescript animations: [ trigger('changeBgColor', [ state('default', style({ backgroundColor: 'white' })), state('changed', style({ backgroundColor: 'blue' })), transition('default <=> changed', animate(500)), ]) ]
2. Solution 2:
typescript animations: [ trigger('moveDiv', [ state('left', style({ transform: 'translateX(0)' })), state('right', style({ transform: 'translateX(100px)' })), transition('left <=> right', animate('2s')), ]) ]
3. Solution 3: You can create separate triggers for each animation and apply them to the same element.