How to reuse angular observable across multiple components? (To avoid having to duplicate a request twice?)

Question

I have a service \"MyHttpService\" that includes an observable like this:

grabData() {
return this.http.get(\'myaddress\')
                         .map((res         


        

Answer 1

When you subscribe in TwoComponent it will cause the http request to be sent again. The best way for you to prevent multiple http calls would be to store the response data in your service and before the http call, check if you have already saved the data and if so just directly returning the data.