New Declarative Control Flow
Angular 17 introduces a new way to manage template structure using keywords:
- Replaces *ngIf, *ngFor, and *ngSwitch directives.
- Uses cleaner syntax like @if, @for, and @switch.
- Improves code readability and maintainability.
- Offers a more intuitive way to control template flow.
@for (product of products(); track product.id) {
<div class="card">
<h2 class="card-title">{{product.productName}}</h2>
[…]
</div>
}
@empty {
<p class="text-lg">No Products found!</p>
}
- @for replaces *ngFor: It iterates over a function call products() that presumably returns an array of products.
- track by product.id: Improves performance by tracking products using their unique id.
- Content inside @for: Renders for each product, likely displaying details like name (product.productName) within a card structure.
- Empty State: The @empty block handles the scenario where products() returns no items.
- No Products Found Message: If empty, displays a message indicating no products were found.
Angular 17: A Comprehensive Look at What’s New
Angular 17, released on November 6, 2023, marked a significant step forward for this popular JavaScript framework. It introduced a range of innovative features designed to enhance developer experience, improve application performance, and streamline the development process. This article delves into these new features, explaining them in a beginner-friendly manner and providing practical examples for better understanding.
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