How to Extract Angular Route Params and Query Strings Together

Learn how to efficiently fetch Angular route parameter values from the URL, including query strings, with our step-by-step guide.
---
This video is based on the question stackoverflow.com/q/74773117/ asked by the user 'Jon Sud' ( stackoverflow.com/u/10932853/ ) and on the answer stackoverflow.com/a/74773284/ provided by the user 'Andrew Allen' ( stackoverflow.com/u/4711754/ ) 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: How to get the angular route params values in the url?

Also, Content (except music) licensed under CC BY-SA meta.stackexchange.com/help/licensing
The original Question post is licensed under the 'CC BY-SA 4.0' ( creativecommons.org/licenses/by-sa/4.0/ ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( creativecommons.org/licenses/by-sa/4.0/ ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Extract Angular Route Params and Query Strings Together

If you're working with Angular, one common requirement is to extract route parameters and query string values from the URL. You may want to retrieve meaningful information from the URL structure your application uses, such as /Chapter/:chapterId/Section/:sectionId. For instance, consider a URL like server.com/Chapter/1/Section/2?search=moby. We aim to extract the parameters and format them into an object like this: {chapterId: '1', sectionId: '2', search: 'moby'}. Let's break down how to achieve this step by step.

Understanding the Problem

In the example URL, we have two primary elements to consider:

Route Parameters: Values that are part of the URL path, such as chapterId and sectionId.

Query Parameters: Additional information appended to the URL, such as search in the form of a key-value pair.

In our case, we want to pull these values together in a structured format using Angular's routing capabilities.

The Solution: Using ActivatedRoute in Angular

To extract route parameters and query strings efficiently, we utilize the ActivatedRoute service provided by Angular. This service allows us to access route-related information directly in our components.

Step-by-Step Implementation

Inject the ActivatedRoute Service:
You need to inject the ActivatedRoute service into the constructor of your component. This enables you to access the route parameters and query parameters.

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

Set Up an Observable for Parameters:
Create an observable that combines both route parameters and query parameters. To do this, we use combineLatest to merge the observable streams for parameters.

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

Combine Parameter Observables:
Inside the ngOnInit lifecycle hook, combine the paramMap and queryParamMap from the ActivatedRoute. Use the map operator to transform these into a formatted object.

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

Final Object Structure

Once you implement the above logic, your observable (params$) will emit an object that looks like this:

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

Conclusion

Extracting route parameters and query strings in Angular might seem daunting at first, but it’s quite straightforward with the use of ActivatedRoute. By following the steps outlined above, you can seamlessly pull out the information you need from your URLs while keeping your code clean and manageable.

Feel free to use this approach in your Angular applications to handle route parameters and query strings efficiently!