Скачать или смотреть Mastering the Angular 8 Gallery: Changing Data by Matching Values

Learn how to dynamically change gallery items in `Angular 8` using a streamlined method instead of switch statements.
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How to Change Data by Matching Value in Angular 8

If you are working with Angular 8 and want to change the displayed items in a gallery based on user interaction, you may have encountered the challenge of dynamically filtering these items. Perhaps you started with a switch statement, but now you are interested in exploring a more efficient solution. This guide will walk you through a straightforward approach to achieving this dynamic functionality in your Angular application.

The Objective

You want to display different sets of gallery items based on the user’s selection. For instance, if a user clicks on "Photos," only the photo items should appear, while clicking "All" should show all items. This approach enhances user experience by allowing for easy navigation through content.

Step-by-Step Solution

Let's break down the solution into manageable sections. You’ll need to declare an array of items, set up a function for handling user clicks, and conditionally display items based on the user's selection.

1. Define the Items

First, you need to declare an array of items that represent your gallery content. Here’s a quick example:

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2. Set up a Click Handler

Next, declare a variable that will store the current display option. This variable will be updated based on user interaction when they click on the gallery options.

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3. Create the User Interface

Your HTML should allow the user to click on the different options. Use Angular’s structural directive *ngFor to iterate through the items array and display the options. Here’s the relevant part of the code:

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4. Display the Gallery Items

Now that you are tracking the selected display option, you can conditionally render the gallery items based on this selection. Here’s how you can implement that:

[[See Video to Reveal this Text or Code Snippet]]

The Complete Code

Putting it all together, your TypeScript and HTML will look something like this:

TypeScript

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HTML

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Conclusion

This approach offers a clean and efficient way to filter gallery items in Angular 8 without relying on lengthy switch statements. By leveraging Angular’s structural directives and binding capabilities, you can create a user-friendly experience that seamlessly adapts to users' selections. Enjoy building your dynamic galleries!