What method can be used to modify the src attribute of an <img> tag given that the id of the <img> element is known?

My challenge involves displaying an array of images using a *ngFor loop.

itemimg.component.html

<div *ngFor="let itemimg of itemimgs" [class.selected]="itemimg === selectedItemimg" 
            (click)="onSelect(itemimg)"> 
    <img id="{{itemimg.index}}" class="thumb" src="{{itemimg.imageUrl}}" width="{{itemimg.width}}" height="{{itemimg.height}}" 
        style="float: left; margin-right: 3px; margin-bottom: 3px">
</div>

My goal is to replace the first image when any of the displayed images are clicked.

itemimg.components.ts (part)

  onSelect(itemimg: Itemimg): void{ 
    this.selectedItemimg = itemimg;
    var newsrc = "../../assets/images/" + itemimg.route + ".jpg";
    //alert (newsrc);
    *what-goes-here* = newsrc;    // the problem
  }

I have been searching online for over three hours without finding a solution to my issue. Appreciate your assistance in advance.

typescriptangular2-components

Answer №1

Here are the steps to follow if you want to always replace the first image in the array:

function updateFirstImage(itemImg: ItemImg): void {
this.selectedItemImg = itemImg;
var newSource = "../../assets/images/" + itemImg.route + ".jpg";
// Uncomment the line below to display an alert with the new source
//alert(newSource);
this.itemImgs[0].imageUrl = newSource;

}

Answer №2

If you're looking to update the imageUrl of the initial image within the itemimgs array, it's a simple process.

All that's required is:

this.itemimgs[0].imageUrl = newsrc;

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