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ngx-flip-card

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Angular component to animate a double-sided card.

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import { Component, EventEmitter, Input, Output } from '@angular/core'; import * as i0 from "@angular/core"; import * as i1 from "@angular/common"; export class NgxFlipCardComponent { constructor() { this._isBackSide = false; this.isBackSideChange = new EventEmitter(); this.animate = true; this.animationDuration = 2500; this.animationEnd = new EventEmitter(); this.canAnimate = false; this.frontRotation = 0; this.backRotation = 180; this.desiredFrontRotation = 0; this.frontZindex = 1; this.backZindex = 0; this.translationZ = 2; this.currentTranslationZ = 0; this.easing = 'linear'; this.direction = 'horizontal'; this.flipOnClick = true; this.timeLastFrame = Date.now(); this.currentAnimationTime = 0; this.animating = false; } set isBackSide(value) { if (value === this._isBackSide) { return; } this._isBackSide = value; this.isBackSideChange.emit(this._isBackSide); this.flipInternal(); } get isBackSide() { return this._isBackSide; } ngOnInit() { } ngAfterViewInit() { this.canAnimate = true; } flipInternal() { this.rotateAction(); } clickHandler() { if (this.flipOnClick) { this.flipCard(); } } flipCard() { this.isBackSide = !this._isBackSide; } rotateAction() { if (!this.animate || !this.canAnimate) { this.rotateFlat(); } else { this.animateRotationStart(); } } rotateFlat() { if (this.isBackSide) { this.frontRotation = 180; this.backRotation = 0; this.frontZindex = 0; this.backZindex = 1; } else { this.frontRotation = 0; this.backRotation = 180; this.frontZindex = 1; this.backZindex = 0; } } animateRotationStart() { this.desiredFrontRotation = this.isBackSide ? 180 : 0; this.timeLastFrame = Date.now(); if (this.animating) { this.currentAnimationTime = this.calculateReverseEasing(); } else { this.currentAnimationTime = 0; } if (this.animationFrameRef) { cancelAnimationFrame(this.animationFrameRef); } this.animationFrameRef = requestAnimationFrame(this.animateLoop.bind(this)); this.animating = true; this.currentTranslationZ = this.translationZ; } animateLoop() { const time = Date.now(); const deltatime = time - this.timeLastFrame; this.timeLastFrame = time; this.currentAnimationTime += deltatime; const amount = this.currentAnimationTime / this.animationDuration; switch (this.easing) { case 'linear': this.frontRotation = this.isBackSide ? Math.min(this.lerp(0, this.desiredFrontRotation, amount), this.desiredFrontRotation) : Math.max(this.lerp(180, this.desiredFrontRotation, amount), this.desiredFrontRotation); break; case 'easeIn': this.frontRotation = this.isBackSide ? Math.min(this.easeIn(0, this.desiredFrontRotation, amount), this.desiredFrontRotation) : Math.max(this.easeIn(180, this.desiredFrontRotation, amount), this.desiredFrontRotation); break; case 'easeOut': this.frontRotation = this.isBackSide ? Math.min(this.easeOut(0, this.desiredFrontRotation, amount), this.desiredFrontRotation) : Math.max(this.easeOut(180, this.desiredFrontRotation, amount), this.desiredFrontRotation); break; case 'easeInOut': this.frontRotation = this.isBackSide ? Math.min(this.easeInOut(0, this.desiredFrontRotation, amount), this.desiredFrontRotation) : Math.max(this.easeInOut(180, this.desiredFrontRotation, amount), this.desiredFrontRotation); break; } if (this.currentAnimationTime >= this.animationDuration) { this.frontRotation = this.desiredFrontRotation; } this.backRotation = this.frontRotation + 180; if (this.isBackSide && this.frontRotation >= 90) { this.frontZindex = 0; this.backZindex = 1; } else if (!this.isBackSide && this.frontRotation <= 90) { this.frontZindex = 1; this.backZindex = 0; } if (this.frontRotation === this.desiredFrontRotation) { this.animationEnded(); return; } this.animationFrameRef = requestAnimationFrame(this.animateLoop.bind(this)); } lerp(a, b, n) { return (1 - n) * a + n * b; } easeIn(a, b, n) { return this.lerp(a, b, n * n); } easeOut(a, b, n) { return this.lerp(a, b, 1 - (1 - n) * (1 - n)); } easeInOut(a, b, n) { return this.lerp(a, b, n < 0.5 ? 2 * n * n : 1 - Math.pow(-2 * n + 2, 2) / 2); } calculateReverseEasing() { if (this.easing === 'linear') { return this.animationDuration - this.currentAnimationTime; } const start = this._isBackSide ? 0 : 180; const end = this._isBackSide ? 180 : 0; // increment 16 milliseconds to simulate animation at 60FPS for (let i = 0; i < this.animationDuration; i += 16) { let inverseValue = 0; switch (this.easing) { case 'easeIn': inverseValue = this.easeIn(start, end, i / this.animationDuration); break; case 'easeOut': inverseValue = this.easeOut(start, end, i / this.animationDuration); break; case 'easeInOut': inverseValue = this.easeInOut(start, end, i / this.animationDuration); break; } if ((this._isBackSide && inverseValue >= this.frontRotation) || (!this._isBackSide && inverseValue <= this.frontRotation)) { return i; } } return 0; } animationEnded() { this.animationEnd.emit(this.isBackSide); this.animating = false; this.currentTranslationZ = 0; } } NgxFlipCardComponent.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.3.11", ngImport: i0, type: NgxFlipCardComponent, deps: [], target: i0.ɵɵFactoryTarget.Component }); NgxFlipCardComponent.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "12.0.0", version: "13.3.11", type: NgxFlipCardComponent, selector: "ngx-flip-card", inputs: { isBackSide: "isBackSide", animate: "animate", animationDuration: "animationDuration", translationZ: "translationZ", easing: "easing", direction: "direction", flipOnClick: "flipOnClick" }, outputs: { isBackSideChange: "isBackSideChange", animationEnd: "animationEnd" }, ngImport: i0, template: "<div class=\"card-container\" (click)=\"clickHandler()\">\n <div class=\"card-side\"\n [ngStyle]=\"{ 'transform': (direction === 'horizontal' ? 'rotateY(' + frontRotation + 'deg)' : 'rotateX(' + frontRotation + 'deg)') + ' translateZ(' + currentTranslationZ + 'px )', 'z-index': frontZindex }\">\n <ng-content select=\"[card-front]\"></ng-content>\n </div>\n <div class=\"card-side\" \n [ngStyle]=\"{ 'transform': (direction === 'horizontal' ? 'rotateY(' + backRotation + 'deg)' : 'rotateX(' + backRotation + 'deg)') + ' translateZ(' + currentTranslationZ + 'px )', 'z-index': backZindex }\">\n <ng-content select=\"[card-back]\"></ng-content>\n </div>\n</div>\n", styles: [".card-container{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);position:relative;perspective:500px;width:-moz-fit-content;width:fit-content}.card-side{grid-row:1 / -1;grid-column:1 / -1;transform-origin:center}\n"], directives: [{ type: i1.NgStyle, selector: "[ngStyle]", inputs: ["ngStyle"] }] }); i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.3.11", ngImport: i0, type: NgxFlipCardComponent, decorators: [{ type: Component, args: [{ selector: 'ngx-flip-card', template: "<div class=\"card-container\" (click)=\"clickHandler()\">\n <div class=\"card-side\"\n [ngStyle]=\"{ 'transform': (direction === 'horizontal' ? 'rotateY(' + frontRotation + 'deg)' : 'rotateX(' + frontRotation + 'deg)') + ' translateZ(' + currentTranslationZ + 'px )', 'z-index': frontZindex }\">\n <ng-content select=\"[card-front]\"></ng-content>\n </div>\n <div class=\"card-side\" \n [ngStyle]=\"{ 'transform': (direction === 'horizontal' ? 'rotateY(' + backRotation + 'deg)' : 'rotateX(' + backRotation + 'deg)') + ' translateZ(' + currentTranslationZ + 'px )', 'z-index': backZindex }\">\n <ng-content select=\"[card-back]\"></ng-content>\n </div>\n</div>\n", styles: [".card-container{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);position:relative;perspective:500px;width:-moz-fit-content;width:fit-content}.card-side{grid-row:1 / -1;grid-column:1 / -1;transform-origin:center}\n"] }] }], ctorParameters: function () { return []; }, propDecorators: { isBackSide: [{ type: Input }], isBackSideChange: [{ type: Output }], animate: [{ type: Input }], animationDuration: [{ type: Input }], animationEnd: [{ type: Output }], translationZ: [{ type: Input }], easing: [{ type: Input }], direction: [{ type: Input }], flipOnClick: [{ type: Input }] } }); //# 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{ AfterViewInit, Component, EventEmitter, Input, OnInit, Output } from '@angular/core';\n\n@Component({\n  selector: 'ngx-flip-card',\n  templateUrl: './ngx-flip-card.component.html',\n  styleUrls: ['./ngx-flip-card.component.css']\n})\nexport class NgxFlipCardComponent implements OnInit, AfterViewInit {\n\n  private _isBackSide: boolean = false;\n  @Input()\n  set isBackSide(value: boolean) {\n    if(value === this._isBackSide){\n      return;\n    }\n\n    this._isBackSide = value;\n    this.isBackSideChange.emit(this._isBackSide);\n    this.flipInternal();\n  }\n\n  get isBackSide(): boolean {\n    return this._isBackSide;\n  }\n\n  @Output() isBackSideChange = new EventEmitter<boolean>();\n\n  @Input() animate: boolean = true;\n\n  @Input() animationDuration: number = 2500;\n\n  @Output() animationEnd = new EventEmitter<boolean>();\n\n  private canAnimate: boolean = false;\n\n  frontRotation: number = 0;\n  backRotation: number = 180;\n\n  private desiredFrontRotation: number = 0;\n\n  frontZindex: number = 1;\n  backZindex: number = 0;\n\n  @Input() translationZ: number = 2;\n  currentTranslationZ: number = 0;\n\n  @Input() easing: FlipCardEase = 'linear';\n\n  @Input() direction: FlipCardDirection = 'horizontal';\n\n  @Input() flipOnClick: boolean = true;\n\n  private timeLastFrame: number = Date.now();\n  private currentAnimationTime: number = 0;\n  private animationFrameRef: number | undefined;\n  private animating: boolean = false;\n\n  constructor() { }\n\n  ngOnInit(): void {\n  }\n\n  ngAfterViewInit(): void {\n    this.canAnimate = true;\n  }\n\n  private flipInternal(){\n    this.rotateAction();\n  }\n\n  clickHandler() {\n    if(this.flipOnClick){\n      this.flipCard();\n    }\n  }\n\n  flipCard() {\n    this.isBackSide = !this._isBackSide;\n  }\n\n  private rotateAction(){\n    if(!this.animate || !this.canAnimate){\n      this.rotateFlat();\n    } else {\n      this.animateRotationStart();\n    }\n  }\n\n  private rotateFlat(){\n    if(this.isBackSide){\n      this.frontRotation = 180;\n      this.backRotation = 0;\n      this.frontZindex = 0;\n      this.backZindex = 1;\n    } else {\n      this.frontRotation = 0;\n      this.backRotation = 180;\n      this.frontZindex = 1;\n      this.backZindex = 0;\n    }\n  }\n\n  private animateRotationStart(){\n    this.desiredFrontRotation = this.isBackSide ? 180 : 0;\n    this.timeLastFrame = Date.now();\n\n    if(this.animating){\n      this.currentAnimationTime = this.calculateReverseEasing();\n    } else {\n      this.currentAnimationTime = 0;\n    }\n\n    if(this.animationFrameRef){\n      cancelAnimationFrame(this.animationFrameRef);\n    }\n    this.animationFrameRef = requestAnimationFrame(this.animateLoop.bind(this));\n    this.animating = true;\n    this.currentTranslationZ = this.translationZ;\n  }\n\n  private animateLoop(){\n    const time = Date.now();\n    const deltatime = time - this.timeLastFrame;\n    this.timeLastFrame = time;\n    this.currentAnimationTime += deltatime;\n    const amount = this.currentAnimationTime / this.animationDuration;\n\n    switch(this.easing){\n      case 'linear':\n        this.frontRotation = this.isBackSide ?\n          Math.min(this.lerp(0, this.desiredFrontRotation, amount), this.desiredFrontRotation) :\n          Math.max(this.lerp(180, this.desiredFrontRotation, amount), this.desiredFrontRotation);\n        break;\n      case 'easeIn':\n        this.frontRotation = this.isBackSide ?\n          Math.min(this.easeIn(0, this.desiredFrontRotation, amount), this.desiredFrontRotation) :\n          Math.max(this.easeIn(180, this.desiredFrontRotation, amount), this.desiredFrontRotation);\n        break;\n      case 'easeOut':\n        this.frontRotation = this.isBackSide ?\n          Math.min(this.easeOut(0, this.desiredFrontRotation, amount), this.desiredFrontRotation) :\n          Math.max(this.easeOut(180, this.desiredFrontRotation, amount), this.desiredFrontRotation);\n        break;\n      case 'easeInOut':\n        this.frontRotation = this.isBackSide ?\n          Math.min(this.easeInOut(0, this.desiredFrontRotation, amount), this.desiredFrontRotation) :\n          Math.max(this.easeInOut(180, this.desiredFrontRotation, amount), this.desiredFrontRotation);\n        break;\n    }\n\n    if(this.currentAnimationTime >= this.animationDuration){\n      this.frontRotation = this.desiredFrontRotation;\n    }\n\n    this.backRotation = this.frontRotation + 180;\n\n    if(this.isBackSide && this.frontRotation >= 90){\n      this.frontZindex = 0;\n      this.backZindex = 1;\n    } else if(!this.isBackSide && this.frontRotation <= 90) {\n      this.frontZindex = 1;\n      this.backZindex = 0;\n    }\n\n    if(this.frontRotation === this.desiredFrontRotation){\n      this.animationEnded();\n      return;\n    }\n\n    this.animationFrameRef = requestAnimationFrame(this.animateLoop.bind(this));\n  }\n\n  private lerp(a: number, b: number, n: number) {\n    return (1 - n) * a + n * b;\n  }\n\n  private easeIn(a: number, b: number, n: number): number {\n    return this.lerp(a, b, n * n);\n  }\n\n  private easeOut(a: number, b: number, n: number): number {\n    return this.lerp(a, b, 1 - (1 - n) * (1 - n));\n  }\n\n  private easeInOut(a: number, b: number, n: number): number {\n    return this.lerp(a, b, n < 0.5 ? 2 * n * n : 1 - Math.pow(-2 * n + 2, 2) / 2);\n  }\n\n  private calculateReverseEasing(): number{\n    if(this.easing === 'linear'){\n      return this.animationDuration - this.currentAnimationTime;\n    }\n\n    const start = this._isBackSide ? 0 : 180;\n    const end = this._isBackSide ? 180 : 0;\n\n    // increment 16 milliseconds to simulate animation at 60FPS\n    for(let i = 0; i < this.animationDuration; i += 16){\n      let inverseValue = 0;\n      switch(this.easing){\n        case 'easeIn':\n          inverseValue = this.easeIn(start, end, i / this.animationDuration);\n          break;\n        case 'easeOut':\n          inverseValue = this.easeOut(start, end, i / this.animationDuration);\n          break;\n        case 'easeInOut':\n          inverseValue = this.easeInOut(start, end, i / this.animationDuration);\n          break;\n      }\n\n      if((this._isBackSide && inverseValue >= this.frontRotation) ||\n            (!this._isBackSide && inverseValue <= this.frontRotation)){\n        return i;\n      }\n    }\n\n    return 0;\n  }\n\n  private animationEnded(){\n    this.animationEnd.emit(this.isBackSide);\n    this.animating = false;\n    this.currentTranslationZ = 0;\n  }\n\n}\n\nexport type FlipCardEase = 'linear' | 'easeIn' | 'easeOut' | 'easeInOut';\n\nexport type FlipCardDirection = 'horizontal' | 'vertical';\n","<div class=\"card-container\" (click)=\"clickHandler()\">\n    <div class=\"card-side\"\n        [ngStyle]=\"{ 'transform': (direction === 'horizontal' ? 'rotateY(' + frontRotation + 'deg)' : 'rotateX(' + frontRotation + 'deg)') +  ' translateZ(' + currentTranslationZ + 'px )', 'z-index': frontZindex }\">\n        <ng-content select=\"[card-front]\"></ng-content>\n    </div>\n    <div class=\"card-side\" \n        [ngStyle]=\"{ 'transform': (direction === 'horizontal' ? 'rotateY(' + backRotation + 'deg)' : 'rotateX(' + backRotation + 'deg)') + ' translateZ(' + currentTranslationZ + 'px )', 'z-index': backZindex }\">\n        <ng-content select=\"[card-back]\"></ng-content>\n    </div>\n</div>\n"]}