It appears that most people find observers to be a piece of cake, but I personally struggle with them. I am trying to set up an observable that can receive a number input after it has been created, triggered by pressing a button. However, all the examples I have come across define the content of the observable in the constructor. Is there a way to achieve this?
Thank you
const { Subject, fromEvent } = rxjs;
const number$ = new Subject();
fromEvent(document.getElementById('button'), 'click').subscribe(() => {
number$.next(Math.random() * 10);
});
number$.subscribe(number => {
document.getElementById('output').innerText = number;
});<script src="https://cdnjs.cloudflare.com/ajax/libs/rxjs/6.3.3/rxjs.umd.min.js"></script>
<button id="button">Click for random number</button>
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