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Скачать или смотреть Efficiently Cache Dynamic API Requests in Angular PWA with ngsw-config.json

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  • 2025-09-22
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Efficiently Cache Dynamic API Requests in Angular PWA with ngsw-config.json
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Описание к видео Efficiently Cache Dynamic API Requests in Angular PWA with ngsw-config.json

Learn how to dynamically cache API requests in Angular PWA without manually adding URLs to `ngsw-config.json` file. Find out simple solutions to improve performance.
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This video is based on the question https://stackoverflow.com/q/63035262/ asked by the user 'ASR' ( https://stackoverflow.com/u/11826523/ ) and on the answer https://stackoverflow.com/a/63041917/ provided by the user 'ASR' ( https://stackoverflow.com/u/11826523/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: In Angular PWA How to Cache the API request( with paramter ) dynamically instead of manually adding each and every url in ngsw-config.json

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The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

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Efficiently Cache Dynamic API Requests in Angular PWA

In the world of web development, performance is key to providing a smooth user experience. As we shift toward Progressive Web Apps (PWAs), caching API requests dynamically can significantly enhance loading times and overall performance. However, developers often encounter challenges while configuring these caches, especially when dealing with dynamic parameters in URLs.

In this guide, we will explore how to cache API requests dynamically in Angular PWA, enabling responses to be stored without the need for manually adding every single URL to the ngsw-config.json file.

Understanding the Problem

Consider an API call structured as follows:

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

In this example, the parameter q changes based on the user's search input (e.g., london, manchester, birmingham). Adding every possible combination of these parameters to the ngsw-config.json could quickly become unwieldy and inefficient.

Your Questions

Can I cache all variations of the URL without specifying each parameter separately?

Can the API response be dynamically stored when a user searches for it, without pre-defining each URL?

The Solution

Fortunately, the solution to both questions lies in understanding how ngsw-config.json works with base URLs. Here’s how you can configure it effectively:

Step 1: Utilize Base URLs

Instead of specifying the full URL with parameters, you can simply use the base URL. This means that you do not need to include the API key or any query parameters. Here’s how to modify your configuration:

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

Key Benefits of This Approach:

Dynamic Caching: This method allows the caching system to recognize multiple parameters dynamically. When users search for any variation of the parameters (like london, manchester, etc.), the responses will be stored in the cache without additional configuration.

Efficiency: By using only the base URL, you reduce the maintenance overhead associated with manually adding multiple URLs.

Step 2: Dynamic Response Storage

With the initial setup done, the next part is enabling your application to store the API response dynamically during user interactions. This is typically handled by Angular’s service worker, which can cache API calls, allowing for a seamless offline experience.

Immediate Caching: When the user makes an API request, the Angular service worker captures the request and the response. The response gets cached automatically according to the rules you've defined in the ngsw-config.json.

Behavior on Re-execution: If the user searches for the same query again, the service worker retrieves the data from the cache instead of making a new network request, resulting in faster load times.

Conclusion

By leveraging the base URL in your ngsw-config.json and enabling dynamic caching through the Angular service worker, you can simplify your Angular PWA's caching strategy significantly. This approach not only enhances user experience by reducing loading times but also minimizes the complexity associated with managing countless URL parameters.

As always, make sure to test your implementation thoroughly to ensure that the caching behaves as expected and meets your application's performance needs.

With these tips, you can confidently enhance the performance of your Angular PWA without the hassle of managing multiple URLs!

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