


How to Implement RouteReuseStrategy shouldDetach for Specific Routes in Angular 2?
Implement RouteReuseStrategy shouldDetach for Specific Routes in Angular 2
Introduction
In Angular 2, you can implement the RouteReuseStrategy interface to control the behavior of route storage when navigating between routes. One common scenario is to store the current route in memory when leaving certain routes so that it can be quickly accessed when returning to it. This strategy can improve performance, especially for routes that involve time-consuming or resource-intensive operations.
Implementing shouldDetach for Specific Routes
To implement this strategy, you'll need to create a class that implements RouteReuseStrategy. The key method in this class is shouldDetach, which determines whether to detach and store the current route when navigating away from it.
To implement shouldDetach, you can check the route configuration and compare it against a list of routes that you want to store or not store. For example, let's say you want to store the search results page (/search/:term) but not the specific result page (/view/:id). Your shouldDetach method could look something like this:
<code class="typescript">shouldDetach(route: ActivatedRouteSnapshot): boolean { // Check if the route path is '/search/:term' const isSearchRoute = route.routeConfig && route.routeConfig.path === 'search/:term'; // Store the route if it's the search route return isSearchRoute; }</code>
Providing the Strategy to Angular
Once you have created the RouteReuseStrategy class, you need to provide it to Angular. You can do this by adding the following code to your NgModule class:
<code class="typescript">@NgModule({ providers: [ { provide: RouteReuseStrategy, useClass: CustomRouteReuseStrategy } ] })</code>
Conclusion
By implementing the RouteReuseStrategy interface and customizing the shouldDetach method, you can control when specific routes are stored and reused in your Angular application. This technique can optimize the performance of your application by reducing unnecessary server requests and component re-rendering for routes that benefit from being stored in memory.
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