How to import rxjs timer in angular 6?
From rxjs 6 (as used in angular 6 project), The general rule is as follows:
rxjs: Creation methods, types, schedulers and utilities
import { timer, Observable, Subject, asapScheduler, pipe, of, from, interval, merge, fromEvent } from 'rxjs';rxjs/operators: All pipeable operators:
import { map, filter, scan } from 'rxjs/operators';
Here is the migration guide: https://github.com/ReactiveX/rxjs/blob/master/MIGRATION.md#observable-classes
All observable classes (https://github.com/ReactiveX/rxjs/tree/5.5.8/src/observable) have been removed from v6, in favor of existing or new operators that perform the same operations as the class methods.
import { timer } from 'rxjs';import { timeInterval, pluck, take} from 'rxjs/operators';var sourcef = timer(200, 100) .pipe( timeInterval(), pluck('interval'), take(3) )See also
as of rxjs 6.2.2, for this import
import { timer } from 'rxjs'; // gives tslint blacklisted errortslint gives an error:
ERR: [tslint] This import is blacklisted, import a submodule instead (import-blacklist)but this works fine without any error
import { timer } from 'rxjs/observable/timer'; //works fine