Accessing data from a reactive source within a component

Upon building a component, I encountered an issue with returning a property containing an observable. While I was able to successfully display the property in the template, I realized that its presence there was unnecessary:

{{(selectedOrder$ | async).orderNumber}}

The above code effectively displayed the order number in the template.

In an attempt to resolve this, I experimented with the following approach:

this.selectedOrder$.pipe(select(order=> {
    this.selectedOrderNumber$ = order.orderNumber;
}));

However, upon launching my application, this resulted in a 404 error, strikingly unexpected.

angulartypescriptasynchronousobservableangular7

Answer №1

When dealing with selectedOrder$ as the Observable, it is necessary to subscribe to it in order to access the value in the component:

this.selectedOrder$.subscribe(order => {
  this.selectedOrderNumber$ = order.orderNumber;
}));

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