/TypeScript/Angular no internet detection

Angular no internet detection

//Tested with Angular 8.1 and rxjs 6.5.2
import { Observable, Observer, fromEvent, merge } from 'rxjs';
import { map } from 'rxjs/operators';

ngOnInit(){
	this.createOnline$().subscribe(isOnline => console.log(isOnline));
}

createOnline$() {
return merge<boolean>(
  fromEvent(window, 'offline').pipe(map(() => false)),
  fromEvent(window, 'online').pipe(map(() => true)),
  new Observable((sub: Observer<boolean>) => {
	sub.next(navigator.onLine);
	sub.complete();
  }));
}

Source: stackoverflow.com

Similar codes

0 vote250 views1 answer
Combine 2 lists to dataframe python
TypeScript
0 vote224 views1 answer
Sts is not opening in mac
TypeScript
0 vote286 views1 answer
Angular calculate difference between two dates
TypeScript
0 vote249 views1 answer
MInus points of exploration
TypeScript
-2 votes293 views5 answers
Could not find a declaration file for module 'module-name'. '/path/to/module-name.js' implicitly has an 'any' type
TypeScript
2 votes242 views1 answer
Adonis many to many
TypeScript
0 vote319 views1 answer
Error TS2503: Cannot find namespace 'google'. 10 @Input() mapOptions: google.maps.MapOptions;
TypeScript
6 votes239 views4 answers
Console
TypeScript
1 vote261 views2 answers
Distance subplots matplotlib
TypeScript
0 vote229 views3 answers
Input adresse ville automatique
TypeScript