Unleashing the power of dynamic carousel initiation in Angular using the @ngu/carousel library

Question

Unleashing the power of dynamic carousel initiation in Angular using the @ngu/carousel library

Is there an npm package available that supports starting a carousel with a dynamic index in Angular 4 or higher, rather than starting from 0?

I've tried using @ngu/carousel, but the myCarousel.moveTo() method doesn't seem to work for this specific scenario.

angular typescript angular6 carousel ngu-carousel

Answer 1

Answer №1

If you want to display different images in your carousel each time the page is viewed, consider randomizing your primary Array (the array with images). This way, every new visit to the page will showcase a unique sequence of images.

Here's how you can achieve this:

<ngu-carousel #myCarousel [inputs]="carouselConfig" [dataSource]="carouselItems">
    <div *nguCarouselDef="let item;" class="item">
        <div class="tile">{{item}}</div>
    </div>
    <button NguCarouselNext class="rightRs">></button>
    <button NguCarouselPrev class="leftRs"><</button>
    <ul class="myPoint" NguCarouselPoint>
        <li *ngFor="let j of myCarousel.pointNumbers; let j = index" [class.active]="j==myCarousel.activePoint" (click)="myCarousel.moveTo(j)"></li>
    </ul>
</ngu-carousel>

To implement this functionality in your Angular application, include the following code snippet in your component file:

import { Component, AfterViewInit, ViewChild, ChangeDetectorRef } from '@angular/core';
import { NguCarousel, NguCarouselConfig } from '@ngu/carousel';

@Component({
  selector: 'app-simple',
  templateUrl: './simple.component.html',
  styleUrls: ['./simple.component.css']
})
export class SimpleComponent implements AfterViewInit {
  name = 'Angular';
  slideNo = 0;
  withAnim = true;
  resetAnim = true;

  @ViewChild('myCarousel') myCarousel: NguCarousel;
  carouselConfig: NguCarouselConfig = {
    grid: { xs: 1, sm: 1, md: 1, lg: 1, all: 0 },
    load: 3,
    interval: { timing: 4000, initialDelay: 1000 },
    loop: true,
    touch: true,
    velocity: 0.2
  }
  carouselItems: any[];

  constructor(private cdr: ChangeDetectorRef) {
    let myArray: any[] = ['item 1', 'item 2', 'item 3'];
    myArray = this.shuffleArray(myArray);
    this.carouselItems = myArray;
  }

  shuffleArray(array) {
    for (let i = array.length - 1; i > 0; i--) {
      const j = Math.floor(Math.random() * (i + 1));
      [array[i], array[j]] = [array[j], array[i]];
    }
    return array;
  }

  ngAfterViewInit() {
    this.cdr.detectChanges();
  }

  reset() {
    this.myCarousel.reset(!this.resetAnim);
  }

  moveTo(slide) {
    this.myCarousel.moveTo(slide, !this.withAnim);
  }
}

For a live demonstration and further exploration, you can check out the working stackblitz here.

Answer 2

If you want to display different images in your carousel each time the page is viewed, consider randomizing your primary Array (the array with images). This way, every new visit to the page will showcase a unique sequence of images.

Here's how you can achieve this:

<ngu-carousel #myCarousel [inputs]="carouselConfig" [dataSource]="carouselItems">
    <div *nguCarouselDef="let item;" class="item">
        <div class="tile">{{item}}</div>
    </div>
    <button NguCarouselNext class="rightRs">></button>
    <button NguCarouselPrev class="leftRs"><</button>
    <ul class="myPoint" NguCarouselPoint>
        <li *ngFor="let j of myCarousel.pointNumbers; let j = index" [class.active]="j==myCarousel.activePoint" (click)="myCarousel.moveTo(j)"></li>
    </ul>
</ngu-carousel>

To implement this functionality in your Angular application, include the following code snippet in your component file:

import { Component, AfterViewInit, ViewChild, ChangeDetectorRef } from '@angular/core';
import { NguCarousel, NguCarouselConfig } from '@ngu/carousel';

@Component({
  selector: 'app-simple',
  templateUrl: './simple.component.html',
  styleUrls: ['./simple.component.css']
})
export class SimpleComponent implements AfterViewInit {
  name = 'Angular';
  slideNo = 0;
  withAnim = true;
  resetAnim = true;

  @ViewChild('myCarousel') myCarousel: NguCarousel;
  carouselConfig: NguCarouselConfig = {
    grid: { xs: 1, sm: 1, md: 1, lg: 1, all: 0 },
    load: 3,
    interval: { timing: 4000, initialDelay: 1000 },
    loop: true,
    touch: true,
    velocity: 0.2
  }
  carouselItems: any[];

  constructor(private cdr: ChangeDetectorRef) {
    let myArray: any[] = ['item 1', 'item 2', 'item 3'];
    myArray = this.shuffleArray(myArray);
    this.carouselItems = myArray;
  }

  shuffleArray(array) {
    for (let i = array.length - 1; i > 0; i--) {
      const j = Math.floor(Math.random() * (i + 1));
      [array[i], array[j]] = [array[j], array[i]];
    }
    return array;
  }

  ngAfterViewInit() {
    this.cdr.detectChanges();
  }

  reset() {
    this.myCarousel.reset(!this.resetAnim);
  }

  moveTo(slide) {
    this.myCarousel.moveTo(slide, !this.withAnim);
  }
}

For a live demonstration and further exploration, you can check out the working stackblitz here.

Answer 3

Answer №2

After some trial and error, I found that moving the myCarousel.moveTo() function to be called within the ngAfterViewInit(){} method instead of the ngOnInit(){} method solved my issue.

Posting on this old thread to share a new solution that worked for me when facing the same problem as mentioned before.

Answer 4

After some trial and error, I found that moving the myCarousel.moveTo() function to be called within the ngAfterViewInit(){} method instead of the ngOnInit(){} method solved my issue.

Posting on this old thread to share a new solution that worked for me when facing the same problem as mentioned before.

Unleashing the power of dynamic carousel initiation in Angular using the @ngu/carousel library

Answer №1

Answer №2

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