Is Piping Mandatory for Single Operator

Question

Should I always use piping in RxJs 6 even if there is just one operator? For example:

observableOf([1, 2, 3])
 .pipe(
    map(num => num * 2)
)

Can I write this without piping:

observableOf([1, 2, 3])
  .map(num => num * 2);

Is this OK for a pipe with just one operator or it is deprecated?

user_310726 · Answer

You're mixing RxJS 6 and RxJS 5 styles of operators.

For RxJS 6 and later, only use pipe operators. Avoid using the old "patch" operators and the rxjs-compat package as it's only for backward compatibility and is deprecated.

For more info see:

Is Piping Mandatory for Single Operator

1 Answers