无法触发和传递角度动画中的参数

Question

我正在尝试编写一个自定义的轮播组件。我在这里遇到两个问题。

首先-在单击按钮或通过组件时触发动画。

第二个-在动画触发器中传递参数。

我正在犯什么错误？

carousel.component.html

<div class="carousel-wrapper">
 <ul class="carousel-inner" #carousel>
   <li class="carousel-button" *ngIf="showControls">
     <span (click)="change('previous')"><i class="fa fa-angle-left" style="font-size:24px"></i></span>
   </li>
   <li *ngFor="let item of items;" class="carousel-item">
     <ng-container [@animateSlide]="{ value: triggerVal, params : { offset: offset } }" [ngTemplateOutlet]="item.tpl">
     </ng-container>
   </li>
   <li class="carousel-button" *ngIf="showControls">
     <span (click)="change('next')"><i class="fa fa-angle-right" style="font-size:24px"></i></span>
   </li>
 </ul>
</div>

carousel.component.ts

import { Input, ViewChild, Component, AfterViewInit, Directive, ContentChildren, ViewChildren, QueryList, TemplateRef, ElementRef } from '@angular/core';
import { trigger, style, group, transition, state, animate, keyframes, query, stagger, animation, useAnimation } from '@angular/animations';

@Directive({
  selector: '[carouselItem]'
})
export class CarouselItemDirective {
  constructor( public tpl : TemplateRef<any> ) { }
}

@Directive({
  selector: '.carousel-item'
})
export class CarouselItemElement {
  constructor( public element : ElementRef<any> ){ }
}

@Component({
  selector: 'app-carousel',
  templateUrl: './carousel.component.html',
  styleUrls: ['./carousel.component.css'],
  animations: [
    trigger('animateSlide', [
      transition('* => for', [
        animate( '250ms ease-in', style({ transform: 'translateX(-{{ offset }}px)' }))
      ])
    ])
  ]
})
export class CarouselComponent implements AfterViewInit {

  @ContentChildren( CarouselItemDirective ) items : QueryList<CarouselItemDirective>;
  @ViewChildren( CarouselItemElement, { read: ElementRef } ) private itemsElements : QueryList<ElementRef>;
  @ViewChild('carousel') private carousel : ElementRef;
  // @Input() timing = '250ms ease-in';
  @Input() showControls = true;
  private itemWidth : number;
  public offset = 0;
  public currentSlide = 0;
  public carouselWrapperStyle = {};
  public triggerVal : boolean;

  constructor() {
    this.triggerVal = false;
  }

  ngAfterViewInit() {
    // this.itemWidth = this.itemsElements.first.nativeElement.getBoundingClientRect().width;
    this.itemWidth = 100;
  }

  change( state ) {
    if( this.currentSlide + 1 === this.items.length ) return;
    if( state == 'next' ){
      this.currentSlide = ( this.currentSlide + 1 ) % this.items.length;
    } else {
      this.currentSlide = ( ( this.currentSlide - 1 ) + this.items.length ) % this.items.length;
    }
    this.offset = this.currentSlide * this.itemWidth;
    console.log( this.offset );
    this.triggerVal = !this.triggerVal;
  }
}

指令的使用-

<app-carousel>
  <ng-container *ngFor="let item of items;">
    <ng-container *carouselItem>
      <div>{{ item.favouriteLocation }}</div>
    </ng-container>
  </ng-container>
</app-carousel>

package.json

{
  "name": "",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build --prod",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@agm/core": "^1.0.0-beta.3",
    "@angular/animations": "6.0.7",
    "@angular/cli": "^6.0.8",
    "@angular/common": "6.0.7",
    "@angular/compiler": "6.0.7",
    "@angular/core": "6.0.7",
    "@angular/forms": "6.0.7",
    "@angular/http": "6.0.7",
    "@angular/platform-browser": "6.0.7",
    "@angular/platform-browser-dynamic": "6.0.7",
    "@angular/router": "6.0.7",
    "@ng-bootstrap/ng-bootstrap": "^2.0.0",
    "angular-font-awesome": "^3.1.2",
    "bootstrap": "^4.1.1",
    "core-js": "^2.4.1",
    "font-awesome": "^4.7.0",
    "jquery": "^3.3.1",
    "popper.js": "^1.14.3",
    "rxjs": "^6.2.1",
    "rxjs-compat": "^6.0.0-rc.0",
    "zone.js": "^0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.6.8",
    "@angular/compiler-cli": "6.0.7",
    "@angular/language-service": "6.0.7",
    "@types/googlemaps": "^3.30.11",
    "@types/jasmine": "~2.8.3",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    "codelyzer": "^4.0.1",
    "jasmine-core": "~2.8.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~2.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~4.1.0",
    "tslint": "~5.9.1",
    "typescript": "2.7.2"
  }
}

Stackblitz-https://stackblitz.com/edit/angular-sliding-div