create

signature: create(subscribe: function)

Example 1: Observable that emits multiple values

Example 2: Observable that emits even numbers on timer

import { Observable } from 'rxjs/Observable';
/*
*/
const evenNumbers = Observable.create(function(observer) {
  const interval = setInterval(() => {
    if (value % 2 === 0) {
      observer.next(value);
    }
    value++;
  }, 1000);
});
//output: 0...2...4...6...8
const subscribe = evenNumbers.subscribe(val => console.log(val));
//unsubscribe after 10 seconds
setTimeout(() => {
  subscribe.unsubscribe();
}, 10000);

Additional Resources

• create
  - Official docs
• 
  - Shane Osbourne