Question

Since javascript’s encodeURIComponent() encodes everything except

(alphabetic)
(decimal digits)
-
_
.
!
~
*
'
(
)

and encodes these into strings of the format %{digits}

Is it true to say that encodeURIComponent always returns some combination of

- _ . ! ~ * ' ( ) %

plus digits and alphabetic characters, or are there any that I have missed?

Additionally, is it fair to say that any string matched here:

/[^\_\-\.\!\~\*\'\(\)\d\w\%]/ig.test(string)

Has therefore definitely not had encodeURIComponent applied to it?

Answer 1

According to the docs

encodeURIComponent escapes all characters except the following
alphabetic, decimal digits, - _ . ! ~ * ' ( )

So I would say you are correct.