Looking to display a single Angular component with varying data? I have a component in Angular that dynamically renders content based on the specific URL path

I have a component that dynamically renders data based on the URL '/lp/:pageId'. The :pageId parameter is used to fetch data from the server in the ngOnInit() lifecycle hook.

ngOnInit(){
  this.apiHelper.getData(this.route.snapshot.params.pageId);
}

The problem I am encountering is ->

  • When I navigate to /lp/apple, it successfully fetches and displays apple-related data.
  • However, when I'm already on /lp/apple and click a link to /lp/banana, the route changes but no new data is fetched because the component is already loaded.

I attempted to fetch data whenever the route changes, but this caused issues with existing functionality.

If anyone has suggestions for best Angular practices to resolve this issue, I would greatly appreciate it. Thank you.

javascriptangulartypescriptangular-ui-routerangular13

Answer №1

Reactive data definition is possible by avoiding fetching data inside the ngOnInit method. Instead, you can create a data observable that relies on the route parameter (since Angular offers route params as an observable on the active route):

public data$ = this.route.paramMap.pipe(
    map(params => params.get('pageId')),
    switchMap(pageId => this.apiHelper.getData(pageId))
);

constructor(private route: ActivatedRoute) { }

The data$ observable will continuously emit the output of apiHelper.getData() every time the route parameter changes.

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