'What is the reason for $ in Angular [duplicate]

What is the reason for the $ used in Angular. Is it a specific RxJS

What is the reason for the $ used in the click$ & interval$ in the example code below:

const click$ = fromEvent(document, 'click').pipe(
  map((e: MouseEvent) => ({
    x: e.clientX,
    y: e.clientY,
    id: Math.random()
  })),
  tap(addHtmlElement),
  mergeMap(coords => subject.pipe(tap(v => setElementText(coords.id, v))))
);

const interval$ = interval(1000).pipe(
  tap(v => subject.next(v)),
  tap(v => setElementText('intervalValue', v))
);

merge(click$, interval$).subscribe();
angulartypescripteventsrxjs


Solution 1:[1]

The $ suffix is only a naming convention used for observables. It has no deeper meaning - analogous to naming interfaces with an I prefix (e.g. ICollection).

Sources

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Source: Stack Overflow

Solution Source
Solution 1 pascalpuetz

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