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How to display additional elements in a product gallery?

When developing a product gallery, it is essential not only to display images, but also to offer interactive functionalities that enrich the user experience. Next, we will explore how to handle additional elements, such as categories and multiple images, using Angular, a popular web development platform.

How to display a category as part of a product?

To enrich the information presented, it is essential to display additional details, such as the product's category. If a product has a category defined as a nested object, we will first need to map these details into our data model.

Creating a model for the category

Before displaying the category details, it is important to define a model for it. This model will contain the attributes id, name and image:

// category.model.tsexport interface Category { id: number; name: string; image: string;}

Incorporation to the product model

Next, we include this model inside the product model, specifying that a product can have a linked category:

// product.model.tsexport interface Product { id: number; name: string; images: string[]; category?: Category;}

Displaying the category in the interface

Finally, we can use the mapped object to display the category name in uppercase, using an Angular pipe:

<!-- product.component.html --><div>{{ product.category?.name | uppercase }}</div>

How to manage and display multiple images of a product?

It is common for products to have more than one image to show different angles or features. Angular makes it easy to manage these images thanks to directives like ngFor.

Implementing ngFor to iterate images

We employ ngFor to iterate over all the images in the array and display them dynamically in the gallery:

<div*ngFor="let image of product.images"> <img [src]="image" (click)="changeCover(image)"></div>

How to set up the main image replacement functionality?

By clicking on any image in the gallery, we should be able to set it as the main image of the product. For this, let's create a signal (or signal) that stores this cover image.

Declaring and managing the cover image signal

First, we declare a signal for the cover image in the product detail component:

// product-detail.component.tscover: string = '';
 ngOnInit() { if (product.images && product.images.length > 0) { this.cover = product.images[0]; }}

Function to change the cover image

We define a function that will update the cover image when clicking on an image in the gallery:

changeCover(newImage: string) { this.cover = newImage;}

Implementation in the HTML.

We ensure that the first image displayed is the initial cover and that gallery images can change it:

<img [src]="cover" alt="Product cover"><div*ngFor="let image of product.images"> <img [src]="image" (click)="changeCover(image)"></div>

With these steps, we achieve an interactive gallery that not only displays multiple images of a product, but also allows you to dynamically change the cover image with a simple click. This functionality significantly enhances the user experience in an online store. As you learn and explore more about Angular, identify areas where you can apply this type of functionality to create more interactive and intuitive experiences. Be sure to experiment and discover new possibilities with Angular!