I need to create a carousel that shows pictures from a variable in the .ts. I planned using ngFor.

I have a static Bootstrap 4 carousel:

 <div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
    <ol class="carousel-indicators">
        <li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
        <li data-target="#carouselExampleIndicators" data-slide-to="1"></li>
        <li data-target="#carouselExampleIndicators" data-slide-to="2"></li>
    </ol>
    <div class="carousel-inner">
        <div class="carousel-item active">
            <img src="assets/fortress.jpg" class="d-block w-100 carousel-pic" alt="...">
        </div>
        <div class="carousel-item">
            <img src="assets/fortress.jpg" class="d-block w-100 carousel-pic" alt="...">
        </div>
    </div>
</div>

And I have a variable in the .ts file called pics:

Now I tried putting the ngFor the carousel, and the active carousel just the first picture. Problem:

• The carousel are off. Just showing three. When I try setting the ngFor there, it doesn't work.
• Slide shows first picture (active) okay but the second slide show the same picture (because the loop starts again) and then it stops, doesn't show the third picture.

When I tried just setting the ngFor as carousel-item, it doesn't work because it requires active class. Also, the item?[0].pin_photos.url just gets the first picture.

   <div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
        <ol class="carousel-indicators">
            <li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
            <li data-target="#carouselExampleIndicators" data-slide-to="1"></li>
            <li data-target="#carouselExampleIndicators" data-slide-to="2"></li>
        </ol>
        <div class="carousel-inner">
            <div class="carousel-item active">
                <img src="http://MYURL/public/PinPhotos/{{item?.pin_photos[0].url}}"
                    class="d-block w-100 carousel-pic" alt="...">
            </div>
            <div *ngFor="let pic of pics">
                <div class="carousel-item">
                    <img src="http://MYURL/public/PinPhotos/{{pic.url}}" class="d-block w-100 carousel-pic" alt="...">
                </div>
            </div>
        </div>
    </div>

What am I missing ?

I need to create a carousel that shows pictures from a variable in the .ts. I planned using ngFor.

I have a static Bootstrap 4 carousel:

 <div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
    <ol class="carousel-indicators">
        <li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
        <li data-target="#carouselExampleIndicators" data-slide-to="1"></li>
        <li data-target="#carouselExampleIndicators" data-slide-to="2"></li>
    </ol>
    <div class="carousel-inner">
        <div class="carousel-item active">
            <img src="assets/fortress.jpg" class="d-block w-100 carousel-pic" alt="...">
        </div>
        <div class="carousel-item">
            <img src="assets/fortress.jpg" class="d-block w-100 carousel-pic" alt="...">
        </div>
    </div>
</div>

And I have a variable in the .ts file called pics:

Now I tried putting the ngFor the carousel, and the active carousel just the first picture. Problem:

• The carousel are off. Just showing three. When I try setting the ngFor there, it doesn't work.
• Slide shows first picture (active) okay but the second slide show the same picture (because the loop starts again) and then it stops, doesn't show the third picture.

When I tried just setting the ngFor as carousel-item, it doesn't work because it requires active class. Also, the item?[0].pin_photos.url just gets the first picture.

   <div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
        <ol class="carousel-indicators">
            <li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
            <li data-target="#carouselExampleIndicators" data-slide-to="1"></li>
            <li data-target="#carouselExampleIndicators" data-slide-to="2"></li>
        </ol>
        <div class="carousel-inner">
            <div class="carousel-item active">
                <img src="http://MYURL/public/PinPhotos/{{item?.pin_photos[0].url}}"
                    class="d-block w-100 carousel-pic" alt="...">
            </div>
            <div *ngFor="let pic of pics">
                <div class="carousel-item">
                    <img src="http://MYURL/public/PinPhotos/{{pic.url}}" class="d-block w-100 carousel-pic" alt="...">
                </div>
            </div>
        </div>
    </div>

What am I missing ?

• javascript
• html
• angular
• typescript
• twitter-bootstrap

5 Answers 5

I use ngFor first variable to set the class for the first item

template

<div id="carouselExampleCaptions" class="carousel slide" data-ride="carousel">
  <ol class="carousel-indicators">
    <li data-target="#carouselExampleCaptions"  *ngFor="let item of items;let index = index" [attr.data-slide-to]="index"></li>
  </ol>
  <div class="carousel-inner">
    <div class="carousel-item" *ngFor="let item of items;let index = index;let isFirst = first" [ngClass]="{active:isFirst}">
      <img [src]="item.url" class="d-block w-100" [alt]="item.title">
      <div class="carousel-caption d-none d-md-block">
        <h5 [textContent]="item.title"></h5>
        <p [textContent]="item.symmery"></p>
      </div>
    </div>
  </div>
  <a class="carousel-control-prev" href="#carouselExampleCaptions" role="button" data-slide="prev">
    <span class="carousel-control-prev-icon" aria-hidden="true"></span>
    <span class="sr-only">Previous</span>
  </a>
  <a class="carousel-control-next" href="#carouselExampleCaptions" role="button" data-slide="next">
    <span class="carousel-control-next-icon" aria-hidden="true"></span>
    <span class="sr-only">Next</span>
  </a>
</div>

trigger carousel manualy like this

  ngAfterViewInit(){
    $('#carouselExampleCaptions').carousel()
  }

demo