3: 51 pm destroy and Reinit Component

---

9/29/23, 3:51 PM
Destroy and Reinit Component
https://chat.openai.com/c/ce870b47-8a2c-41f0-9f1f-d18378c9b80e
1/2
You:
You are angular developer You have one route with :id. When id changes, route does not destroy the component that is responsible for that route, as it
is the same component as before. But, u want to destroy the component and re-init it with the new id.
------------------
ChatGPT:
In Angular, when a route parameter (such as :id) changes but you want to destroy and reinitialize the component with the new parameter value, you
can use the Angular ActivatedRoute and subscribe to its paramMap observable. Here's a step-by-step guide on how to achieve this:
1. Import Dependencies: Make sure you have imported the necessary Angular modules and services in your component. You'll need
ActivatedRoute from @angular/router to access the route parameters.
typescript
import { ActivatedRoute } from '@angular/router';
2. Subscribe to paramMap: In your component, inject the ActivatedRoute service in the constructor and subscribe to its paramMap
observable. This observable emits whenever route parameters change.
typescript
import { Component, OnInit } from '@angular/core';
import { ActivatedRoute } from '@angular/router';
@Component({
selector: 'app-your-component',
templateUrl: './your-component.component.html',
styleUrls: ['./your-component.component.css']
})
export class YourComponent implements OnInit {
constructor(private route: ActivatedRoute) {}
ngOnInit(): void {
// Subscribe to route parameter changes
this.route.paramMap.subscribe((params) => {
// Get the new value of the id parameter
const newId = params.get('id');
// Perform any component-specific initialization logic with the newId
this.initializeComponentWithNewId(newId);
});
}
private initializeComponentWithNewId(newId: string | null): void {
// Here, you can put the logic to destroy and reinitialize your component
// using the newId. This could include fetching data, resetting component state, etc.
}
}
3. Handle Initialization Logic: In the initializeComponentWithNewId method, you can add any logic that needs to be executed when the
id parameter changes. This may include fetching data from an API, updating component properties, or any other necessary tasks.
By subscribing to paramMap changes in your component, you can respond to route parameter changes and reinitialize the component with the new
id value. This allows you to effectively "destroy" and recreate the component when the route parameter changes without navigating away from the
route.
------------------
You:
In your case using subscribe is not good option. You need to destroy and mount page component again when route param changes.
------------------
ChatGPT:
If you want to completely destroy and recreate the component when the route parameter changes, you can use a different approach by utilizing the
RouteReuseStrategy. Here's how you can achieve this:
1. Create a Custom Route Reuse Strategy:
First, create a custom route reuse strategy that will determine whether to reuse or destroy and recreate a component. You can do this by
implementing the RouteReuseStrategy interface.
typescript

---

9/29/23, 3:51 PM
Destroy and Reinit Component
https://chat.openai.com/c/ce870b47-8a2c-41f0-9f1f-d18378c9b80e
2/2
// custom-route-reuse-strategy.ts
import { ActivatedRouteSnapshot, DetachedRouteHandle, RouteReuseStrategy } from '@angular/router';
export class CustomRouteReuseStrategy implements RouteReuseStrategy {
shouldDetach(route: ActivatedRouteSnapshot): boolean {
return false;
}
store(route: ActivatedRouteSnapshot, handle: DetachedRouteHandle | null): void {}
shouldAttach(route: ActivatedRouteSnapshot): boolean {
return false;
}
retrieve(route: ActivatedRouteSnapshot): DetachedRouteHandle | null {
return null;
}
shouldReuseRoute(future: ActivatedRouteSnapshot, current: ActivatedRouteSnapshot): boolean {
// Check if the route parameters have changed
return future.routeConfig === current.routeConfig && JSON.stringify(future.params) === JSON.stringify(c
}
}
This custom route reuse strategy ensures that the component is not reused when route parameters change.
2. Provide the Custom Route Reuse Strategy:
In your AppModule, provide the custom route reuse strategy by configuring the RouteReuseStrategy provider.
typescript
// app.module.ts
import { NgModule } from '@angular/core';
import { RouterModule, RouteReuseStrategy } from '@angular/router';
import { CustomRouteReuseStrategy } from './custom-route-reuse-strategy';
@NgModule({
imports: [
RouterModule.forRoot([
// Define your routes here
]),
],
providers: [
{ provide: RouteReuseStrategy, useClass: CustomRouteReuseStrategy },
],
})
export class AppModule {}
3. Use routerLink in Your Template:
To navigate to different id values within the same route, use the routerLink directive in your component's template. This will trigger the route
parameter change and destroy/recreate the component.
html
Go to New ID
Now, when you navigate to a different id value using the routerLink, the component will be destroyed and recreated, ensuring that it is initialized
with the new id.
------------------