Regex filter for stings that accepts all letters from UTF-8 with the exception of all non-letter characters but with the exception of - (hyphens)

Question

I would to regex filter for stings in javascript, namely a rule or a set of rules that accepts all letters from UTF-8 with the exception of all non-letter characters with the exception of - (hyphens)

For example it is ok to pass the filter:

abcd
ab-cd
müller
1248
ab99
straße
café
façade
São-Paulo
România
etc..

But not the non-letter characters like to ex.:

!"§$%&/()=?`>°^_<|#'@, etc

I tried several ways with regex but without success. Can you help me please

Answer 1

You could match letters and numbers [\p{L}\p{N}]+ with the unicode flag, and if the hyphen should not be at the start or end optionally repeat that part:

^[\p{L}\p{N}]+(?:-[\p{L}\p{N}]+)*$

Regex demo

const regex = /^[\p{L}\p{N}]+(?:-[\p{L}\p{N}]+)*$/gmu;
const str = `abcd
ab-cd
müller
1248
ab99
straße
café
façade
São-Paulo
România
etc..
!
"
§
\$
%
&
/
(
)
=
?
\`
>
°
^
_
<
|
#
'
@
,
`;
console.log(str.match(regex));