multiple states(Routes) when an event fire many times (multiple times)

[ankurkumarnodejs]

I am connecting Angular2 application having multiple states(Routes) with Node server(Socket) running on the back-end. When I visit some other state and come back to the previous state where socket code is written in service file on the angular application created with fromEvent. the service called by subscribe() in multiple components which is called in ngoninit() { } . How often I move on routes gets a component view and event emit when an event fire, So many times (multiple times) the subscribed service gets called (multiple time show console.log("get message")), which affects the performance.

[ankurkumarnodejs]

can anybody solve this problem?

[todorivanov]

Did you try to disconnect and unsubscribe from the socket on ngOnDestroy ?

[caboo2]

try the removeListener() function when you destroy the page