How to use Query Parameters in Angular?
This Article helps you to Understand, What are Query Parameters and How to use Query Parameters in Angular?
Query parameters in Angular allow for passing optional parameters across any route in the application. Query parameters are different from regular route parameters, which are only available on one route and are not optional (e.g., /product/:id).
Add Query Parameters from Service Listing Component
1. Add in template
2. Add Query Parameters to the route programmatically
If you are navigating to the route imperatively using Router.navigate, you will pass in query parameters with queryParams.]
Reading / Fetch Query Parameters
1. Using Observable
The ActivatedRoute class has a queryParams property that returns an observable of the query parameters that are available in the current URL.
2. Using Snapshot
Drawback of snapshot: this only run / updated at the time component is created. so if there is chance to change query parameter or fragment, we currently on - this won't be reactive at time. .
There’s also queryParamMap, which returns an observable with a paramMap object.
Given the following route URL: http://localhost:4200/products?order=popular&filter=new
the resulting shape of the data in orderObj: