What is the `return of ()` syntax

Question

I am considering this piece of code:

This is typescript. On the first line there is:

... return of (true); 

What is the syntax?

Answer 1

Most of the short function names in this snippet are RxJS statements .

Instead:

• Observable.of()
• Observable.from()
• Observable.mergeMap()

You have:

• of()
• from()
• mergeMap()

Look at the top of the snippet, you should see the import for these RxJS statements.

Please note that this is NOT a common practice (I think this makes the code more difficult to read).

Answer 2

Its function is probably called of , in which true is passed. Spaces are not related to parentheses.

Answer 3

of not a TypeScript keyword, there must be a function somewhere called of

  function of<T>(value: T) { // ... }