I'm curious about the changes in the Angular 2 router, particularly the removal of the CanReuse interface. Is there another feature in the router that can achieve the same functionality of forcing a component reload?
I'm curious about the changes in the Angular 2 router, particularly the removal of the CanReuse interface. Is there another feature in the router that can achieve the same functionality of forcing a component reload?
Introducing the new RouteReuseReuse strategy, allowing customization for route rendering upon navigation:
1. Create Your Own Strategy (similar to the old router behavior)
export class CustomReuseStrategy implements RouteReuseStrategy {
shouldDetach(route: ActivatedRouteSnapshot): boolean { return false; }
store(route: ActivatedRouteSnapshot, detachedTree: DetachedRouteHandle): void {}
shouldAttach(route: ActivatedRouteSnapshot): boolean { return false; }
retrieve(route: ActivatedRouteSnapshot): DetachedRouteHandle { return null; }
shouldReuseRoute(future: ActivatedRouteSnapshot, curr: ActivatedRouteSnapshot): boolean {
if(future.routeConfig !== curr.routeConfig) {
return false;
} else if(Object.keys(future.params).length !== Object.keys(curr.params).length ||
Object.keys(future.queryParams).length !== Object.keys(curr.queryParams).length) {
return false;
} else {
return Object.keys(future.params).every(k => future.params[k] === curr.params[k]) &&
Object.keys(future.queryParams).every(k => future.queryParams[k] === curr.queryParams[k]);
}
}
}
2. Implement/Provide Custom Strategy
NgModule({
imports: [...]
declarations: [...],
providers: [
{provide: RouteReuseStrategy, useClass: CustomReuseStrategy}
]
)}
export class AppModule {
}
I encountered a similar issue where components were being reused instead of newly created.
Since the current version of Angular 2 does not provide a solution for this, I came up with a workaround that works for me.
In my scenario, I needed to destroy the outlet-component when my modal window closed.
$('#mymodal_window').on("hide.bs.modal", ()=>{
//manually destroy
for(var o of this.route.parent.children){
if(o.outlet=="myoutletname")
{
var s:any = o.snapshot;
s._routeConfig = null;
}
}
});
Angular internally compares snapshots (specifically _routeConfig) to determine component reuse. In my workaround, I delete the _routeConfig on window close so that a new instance of the component is created next time.
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