使用 animate.enter 與 animate.leave 為應用程式加入動畫

import {Component, signal} from '@angular/core';

@Component({
  selector: 'app-enter',
  templateUrl: 'enter.html',
  styleUrls: ['enter.css'],
})
export class Enter {
  isShown = signal(false);

  toggle() {
    this.isShown.update((isShown) => !isShown);
  }
}

<h2><code>animate.enter</code> Example</h2>

<button type="button" class="toggle-btn" (click)="toggle()">Toggle Element</button>

@if (isShown()) {
  <div class="enter-container" animate.enter="enter-animation">
    <p>The box is entering.</p>
  </div>
}

:host {
  display: block;
  height: 200px;
}

.enter-container {
  border: 1px solid #dddddd;
  margin-top: 1em;
  padding: 20px;
  font-weight: bold;
  font-size: 20px;
}

.enter-container p {
  margin: 0;
}

.enter-animation {
  animation: slide-fade 1s;
}

@keyframes slide-fade {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.toggle-btn {
  background: transparent;
  border: 1px solid var(--primary-contrast, black);
  color: var(--primary-contrast, black);
  padding: 10px 24px;
  border-radius: 8px;
  cursor: pointer;
}

import {Component, signal} from '@angular/core';

@Component({
  selector: 'app-enter-binding',
  templateUrl: 'enter-binding.html',
  styleUrls: ['enter-binding.css'],
})
export class EnterBinding {
  isShown = signal(false);

  toggle() {
    this.isShown.update((isShown) => !isShown);
  }

  enterClass = signal('enter-animation');
}

<h2><code>animate.enter</code> Binding Example</h2>

<button type="button" class="toggle-btn" (click)="toggle()">Toggle Element</button>

@if (isShown()) {
  <div class="enter-container" [animate.enter]="enterClass()">
    <p>The box is entering.</p>
  </div>
}

:host {
  display: block;
  height: 200px;
}

.enter-container {
  border: 1px solid #dddddd;
  margin-top: 1em;
  padding: 20px;
  font-weight: bold;
  font-size: 20px;
}

.enter-container p {
  margin: 0;
}

.enter-animation {
  animation: slide-fade 1s;
}

@keyframes slide-fade {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.toggle-btn {
  background: transparent;
  border: 1px solid var(--primary-contrast, black);
  color: var(--primary-contrast, black);
  padding: 10px 24px;
  border-radius: 8px;
  cursor: pointer;
}

import {Component, signal} from '@angular/core';

@Component({
  selector: 'app-leave',
  templateUrl: 'leave.html',
  styleUrls: ['leave.css'],
})
export class Leave {
  isShown = signal(false);

  toggle() {
    this.isShown.update((isShown) => !isShown);
  }
}

<h2><code>animate.leave</code> Example</h2>

<button type="button" class="toggle-btn" (click)="toggle()">Toggle Element</button>

@if (isShown()) {
  <div class="leave-container" animate.leave="leaving">
    <p>Goodbye</p>
  </div>
}

:host {
  display: block;
  height: 200px;
}

.leave-container {
  border: 1px solid #dddddd;
  margin-top: 1em;
  padding: 20px;
  font-weight: bold;
  font-size: 20px;
  opacity: 1;
  transition: opacity 200ms ease-in;

  @starting-style {
    opacity: 0;
  }
}

.leave-container p {
  margin: 0;
}

.leaving {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 500ms ease-out,
    transform 500ms ease-out;
}

.toggle-btn {
  background: transparent;
  border: 1px solid var(--primary-contrast, black);
  color: var(--primary-contrast, black);
  padding: 10px 24px;
  border-radius: 8px;
  cursor: pointer;
}

import {Component, signal} from '@angular/core';

@Component({
  selector: 'app-leave-binding',
  templateUrl: 'leave-binding.html',
  styleUrls: ['leave-binding.css'],
})
export class LeaveBinding {
  isShown = signal(false);

  toggle() {
    this.isShown.update((isShown) => !isShown);
  }

  farewell = signal('leaving');
}

<h2><code>animate.leave</code> Binding Example</h2>

<button type="button" class="toggle-btn" (click)="toggle()">Toggle Element</button>

@if (isShown()) {
  <div class="leave-container" [animate.leave]="farewell()">
    <p>Goodbye</p>
  </div>
}

:host {
  display: block;
  height: 200px;
}

.leave-container {
  border: 1px solid #dddddd;
  margin-top: 1em;
  padding: 20px;
  font-weight: bold;
  font-size: 20px;
  opacity: 1;
  transition: opacity 200ms ease-in;

  @starting-style {
    opacity: 0;
  }
}

.leave-container p {
  margin: 0;
}

.leaving {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 500ms ease-out,
    transform 500ms ease-out;
}

.toggle-btn {
  background: transparent;
  border: 1px solid var(--primary-contrast, black);
  color: var(--primary-contrast, black);
  padding: 10px 24px;
  border-radius: 8px;
  cursor: pointer;
}

import {Component, signal} from '@angular/core';

@Component({
  selector: 'app-leave-parent',
  templateUrl: 'leave-parent.html',
  styleUrls: ['leave-parent.css'],
})
export class LeaveParent {
  isShown = signal(false);

  toggle() {
    this.isShown.update((isShown) => !isShown);
  }
}

<h2><code>animate.leave</code> Parent Sub-tree Animation Example</h2>

<button type="button" class="toggle-btn" (click)="toggle()">Toggle Element</button>

@if (isShown()) {
  <div class="leave-parent">
    <!-- the child node with `animate.leave` will animate first
         before the parent node is removed from the DOM. -->
    <div class="leave-container" animate.leave="leaving">
      <p>Goodbye</p>
    </div>
  </div>
}

:host {
  display: block;
  height: 200px;
}

.leave-container {
  border: 1px solid #dddddd;
  margin-top: 1em;
  padding: 20px;
  font-weight: bold;
  font-size: 20px;
  opacity: 1;
  transition: opacity 200ms ease-in;

  @starting-style {
    opacity: 0;
  }
}

.leave-container p {
  margin: 0;
}

.leaving {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 500ms ease-out,
    transform 500ms ease-out;
}

.toggle-btn {
  background: transparent;
  border: 1px solid var(--primary-contrast, black);
  color: var(--primary-contrast, black);
  padding: 10px 24px;
  border-radius: 8px;
  cursor: pointer;
}

import {AnimationCallbackEvent, Component, signal} from '@angular/core';

@Component({
  selector: 'app-leave-binding',
  templateUrl: 'leave-event.html',
  styleUrls: ['leave-event.css'],
})
export class LeaveEvent {
  isShown = signal(false);

  toggle() {
    this.isShown.update((isShown) => !isShown);
  }

  leavingFn(event: AnimationCallbackEvent) {
    // Example of calling GSAP
    // gsap.to(event.target, {
    //   duration: 1,
    //   x: 100,
    //   // arrow functions are handy for concise callbacks
    //   onComplete: () => event.animationComplete()
    // });
    event.animationComplete();
  }
}

<h2><code>animate.leave</code> Function Example</h2>

<button type="button" class="toggle-btn" (click)="toggle()">Toggle Element</button>

@if (isShown()) {
  <div class="leave-container" (animate.leave)="leavingFn($event)">
    <p>Goodbye</p>
  </div>
}

:host {
  display: block;
  height: 200px;
}

.leave-container {
  border: 1px solid #dddddd;
  margin-top: 1em;
  padding: 20px;
  font-weight: bold;
  font-size: 20px;
  opacity: 1;
  transition: opacity 200ms ease-in;

  @starting-style {
    opacity: 0;
  }
}

.leave-container p {
  margin: 0;
}

.leaving {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 500ms ease-out,
    transform 500ms ease-out;
}

.toggle-btn {
  background: transparent;
  border: 1px solid var(--primary-contrast, black);
  color: var(--primary-contrast, black);
  padding: 10px 24px;
  border-radius: 8px;
  cursor: pointer;
}