Mastering Angular Animations v7+

Mastering Angular Animations v7+

Gerard Sans

@gerardsans

Gerard Sans

@gerardsans

ย 

SANS

GERARD

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Why introduce motion?

Improved UX โœจ

Perceived Performance

Immersive interactions

Better engagement

User happiness ๐Ÿ˜ƒ

Animation Principles

Squash & Stretch + Anticipation

Follow through

Exaggeration

Composition

Motion Design

ย Principles

Easing

Offset Delay

Parenting

Binding Values

Overlay

CSS Transitions

DURATION

opacity: 0;

opacity: 1;

CSS Transitions

PROPERTY

transition: opacityย 1s ease-inย 1s;

DURATION

TIMING

DELAY

timing function/easing

Fade

<div class="container">
  <div class="circle base elastic"></div>
</div>

.circle {
  border-radius: 50%;
  position: absolute; opacity:0;
  will-change: opacity, transform;
}
.base {
  transition: opacity 1s ease, 
   transform 1s ease;
}
.elastic { 
  transition-timing-function: 
   cubic-bezier(.8,-0.6,0.2,1.5);
}
.container:hover .circle {
  transform: translateX(80px);
  opacity:1;
}

Fade

Animatable CSS

all background* border* bottom box-shadow clip clip-path color filter font* height left margin* mask* offset* opacity outline* padding* perspective* right text-decoration text-shadow top transform vertical-align visibility width z-index

CSS Animations

DURATION

CSS Animations

0%

100%

KEYFRAMES

NAME

animation: ย fadeย  1s 1s infinite linear;

DURATION

DELAY

ITERATIONS

TIMING

Fade

<div class="circle base elastic"></div>

.base {
  animation: fade 2s infinite;
}

@keyframes fade {
  0% { 
    transform: translateX(0px);
    opacity: 0;
  }
  40%, 60% { 
    transform: translateX(80px);
    opacity: 1;
  }
  100% { 
    transform: translateX(0px);
    opacity: 0;
  }
}

Animations Performance

60 FPS

Smooth 60FPS

60 FPS

Time

16.66ms

16.66ms

16.66ms

1000/60ms

paint

frame

paint

frame

paint

frame

๐Ÿ˜ƒ

paint

frame

paint

frame

Losing Frames!

60 FPS

Time

16.66ms

16.66ms

16.66ms

๐Ÿ˜ฑ

Motion Techniques

Move

transform: translateX(10px);

Resize

transform: scale(0.5);

Rotate

transform: rotate(1turn);

Fade

opacity: 0;

Move

<div class="circle base elastic"></div>

.base {
  animation: move 2s infinite;
}
.elastic { 
  animation-timing-function: 
    cubic-bezier(.8,-0.6,0.2,1.5);
}

@keyframes move {
  0% { 
    transform: translateX(-250px);
  }
  40%, 60% { 
    transform: translateX(50px);
  }
  100% { 
    transform: translateX(250px);
  }
}

Rotate

<div class="square base linear"></div>

.base {
  animation: spin 2s infinite;
}
.linear {
  animation-timing-function: linear;
}

@keyframes spin {
  to { 
    transform: rotate(1turn);
  }
}

Resize

<div class="circle base"></div>

.base {
  animation: size 2s infinite;
}

@keyframes size {
  0%, 40%, 100% {
    transform: scale(1);
  }
  25%, 60% {
    transform: scale(1.1);
  }
}

Angular Animations

States & Transitions

fadeIn

fadeOut

Fading animation

TRANSITIONS

STATE

STATE

fadeIn => fadeOut

fadeOut => fadeIn

opacity: 1

opacity: 0

animate('400ms linear')

animate('400ms linear')

fadeOut <=> fadeIn

animate('400ms linear')

Fading an Element

import {fade} from './animations';

@Component({
  selector: 'my-app',
  template: `<button [@fade]='fade' (click)="toggleFade()">Fade</button>`,
  animations: [ fade ]
})
export class App {
  fade = 'fadeIn';
  toggleFade(){
    this.fade = this.fade === 'fadeIn' ? 'fadeOut' : 'fadeIn';
  }
}

Fading Animation

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

export const fade = trigger('fade', [
  state('fadeIn', style({ opacity: 1 })),
  state('fadeOut', style({ opacity: 0 })),
  transition('fadeIn <=> fadeOut', animate('400ms linear'))
]);

Applying

Motion

Example

Adding Motion

void

*

Animating new items

void => *

STATE

STATE

:enter

scale(1)

opacity 1

scale(0.5)

opacity 0

*

void

Animating removed items

* => void

STATE

STATE

:leave

scale(0.5)

opacity 0

scale(1)

opacity 1

Execution Order

sequence

group

time

Dynamic Selectors

class="container"

class="item"

class="item"

query(selector)

Dynamic Selectors

query('.item')

class="container"

class="item"

class="item"

Dynamic Selectors

query('.item:enter')

class="container"

class="item"

class="item"

class="item"

added

Composition

animateChild

time

Stagger

time

Reactive Animations

Introduction

  • React to user interactions
  • Maps user input to CSS
    • mouse position, keyboard, scroll, input field
  • Static or dynamic

Technologies

  • Animations
    • CSS, canvas, WebGL, SVG
  • AnimationBuilder
    • Player
  • Events
    • RxJS

Dynamic Animations

Builder

`(${x}, ${y})`

(100, 50)

Player

Template

1

2

(100, 50)

3

build()

play()

AnimationBuilder

import {AnimationBuilder} from "@angular/animations";
export class MyComponent {
  constructor(
    private elem: ElementRef, 
    private builder: AnimationBuilder
  ) {
    const player = this.playerMoveTo({ x: 100, y: 100 });
    player.play();
  } 
  playerMoveTo(to) {
    const moveAnimation = this.builder.build([
      animate('1s', style({ transform: `translate(${x}px, ${y}px)` }))
    ]);
    return moveAnimation.create(this.elem.nativeElement
      , {params: { x: to.x, y: to.y }});
  }
}

Tracking mouse position

constructor(
  private elem: ElementRef
) {
  // find out center
  this.mx = elem.nativeElement.offsetWidth/2;
  this.my = elem.nativeElement.offsetHeight/2;
} 

ngOnInit() {
  const mouseMove$ = fromEvent(document, 'mousemove')
    .pipe(map(e => ({ x: e.pageX, y: e.pageY })));

  mouseMove$.subscribe({
    next: e => {
      this.lastPosition = { x: e.x-this.mx, y: e.y-this.my };
      const player = this.playerMoveTo(this.lastPosition);
      player.play();
    }
  })
}

More

Influencers

David Khourshid

Issara Willenskomer

Sarah Drasner

Rachel Nabors

Mastering Angular Animations (v7+)

By Gerard Sans

Mastering Angular Animations (v7+)

How we can use Animations in Angular. We will cover Web Animations API and how we can use Angular together with field-tested animation techniques providing examples for CSS transitions/animations and SVG. We will also study browser compatibility and performance to achieve reliable and smooth animations. Let's bring our Angular skills to the awesome world of animations!

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