I can't understand why my function cal is multiplying every time i came on
this page. my code:
```
import { Component, EventEmitter, Input, OnInit, OnDestroy, ViewChild,
AfterViewInit } from '@angular/core';
import { ActivatedRoute, Params, Router } from '@angular/router';
import { FooterService } from '../../services/footer.service';
import {Subscription} from 'rxjs/Subscription';
@Component({
selector: 'manage-broker',
templateUrl: '/app/components/brokers/broker.component.html'
})
export class BrokerComponent implements OnInit, AfterViewInit, OnDestroy {
subscription: Subscription;
ngOnInit(): void {
this.subscription = this.footerService.submit$.subscribe(value =>
value === true ? this.onSubmit() : null);
this.subscription = this.footerService.sendMail$.subscribe(value =>
value === true ? this.popup.open() : null);
}
onSubmit(): void {
this.footerService.setSubmit(false);
this.brokerService.save(this.broker).then(response =>
this.backToList());
}
ngOnDestroy() {
this.subscription.unsubscribe();
}
}
```
My problem is cuz each time i came on this page the onSubmit function call
is grows like first time is called one, second time i came on this page is
called twice etc.
If i refres my browser CTRL+R. the counter is back to 1 and restart the
same behaivor.
Thanks
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