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“Angular observable” Code Answer’s

understanding Observable.create(

whatever by Silly Sandpiper on Dec 30 2020 Donate

import { Observable } from "rxjs/Observable";

var observable = Observable.create(function subscribe(observer) {
    observer.next('Hey guys!')
})

// OR 

var observable = Observable.create((observer:any) => {
    observer.next('Hey guys!')
})

Source: coursetro.com

observable tutorial angular

javascript by Brainy Bear on Nov 03 2020 Donate

      
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      // Create an Observable that will start listening to geolocation updates
// when a consumer subscribes.
const locations = new Observable((observer) => {
  let watchId: number;

  // Simple geolocation API check provides values to publish
  if ('geolocation' in navigator) {
    watchId = navigator.geolocation.watchPosition((position: Position) => {
      observer.next(position);
    }, (error: PositionError) => {
      observer.error(error);
    });
  } else {
    observer.error('Geolocation not available');
  }

  // When the consumer unsubscribes, clean up data ready for next subscription.
  return {
    unsubscribe() {
      navigator.geolocation.clearWatch(watchId);
    }
  };
});

// Call subscribe() to start listening for updates.
const locationsSubscription = locations.subscribe({
  next(position) {
    console.log('Current Position: ', position);
  },
  error(msg) {
    console.log('Error Getting Location: ', msg);
  }
});

// Stop listening for location after 10 seconds
setTimeout(() => {
  locationsSubscription.unsubscribe();
}, 10000);

Source: angular.io

observable js

javascript by Bright Beaver on Sep 25 2020 Donate

-2

      
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      import { Observable } from 'rxjs'; const foo = new Observable(subscriber => {  console.log('Hello');  subscriber.next(42);  subscriber.next(100);  subscriber.next(200);  setTimeout(() => {    subscriber.next(300); // happens asynchronously  }, 1000);}); console.log('before');foo.subscribe(x => {  console.log(x);});console.log('after');

Source: rxjs-dev.firebaseapp.com