Router reuse strategy unables access to query params

In Angular, the routeReuseStrategy can have an impact on query parameter access, especially when reusing components while navigating between routes. By default, Angular reuses components when navigating to the same route with different query parameters. This behavior might cause the component not to reinitialize and, consequently, may not detect the changes in query parameters.

To ensure that query parameters are accessible and the component reinitializes with different query parameters, you can use the OnChanges lifecycle hook. The OnChanges hook is triggered when the component's input properties change, including query parameters.

Here's how you can implement the OnChanges hook in your component:

1. Import the necessary modules and the OnChanges interface:

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import { Component, OnChanges, SimpleChanges } from '@angular/core';
import { ActivatedRoute } from '@angular/router';

2. Implement the OnChanges interface in your component class:

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export class YourComponent implements OnChanges {
  // Your component properties and constructor here

  ngOnChanges(changes: SimpleChanges) {
    // Check if the query parameters have changed
    if (changes && changes.hasOwnProperty('queryParamName')) {
      // Access the updated query parameter value
      const newQueryParamValue = changes.queryParamName.currentValue;

      // Handle the changes or perform any necessary actions
      console.log('Query parameter changed:', newQueryParamValue);
    }
  }
}

In the above code, replace 'queryParamName' with the name of the query parameter you want to track. This code will detect changes to the specific query parameter and allow you to take appropriate actions based on the updated value.

Remember that using the OnChanges hook in this way is not directly related to the routeReuseStrategy, but it provides a mechanism to track query parameter changes in a component and respond accordingly, ensuring that the component remains aware of the query parameters' updates when navigating between routes.

Alternatively, if you want to disable route reuse for specific routes altogether, you can use the runGuardsAndResolvers option with the NavigationExtras object when navigating to the route:

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import { Router, NavigationExtras } from '@angular/router';

// Inside your component class or service method where you want to navigate
const navigationExtras: NavigationExtras = {
  queryParamsHandling: 'merge', // Keep existing query parameters
  runGuardsAndResolvers: 'always', // Always re-run route guards and resolvers
};

this.router.navigate(['/your-route'], navigationExtras);

Setting runGuardsAndResolvers to 'always' ensures that the route guards and resolvers are re-executed every time the route is navigated to, even if the route is the same and only the query parameters have changed. This can help in situations where you need to update the component's behavior based on query parameter changes.