regex - JavaScript - Remove strange characters from string

Question

How do I remove these strange characters from a string?

I have been trying with regex, but with no success.

Before Remove:

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*??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ???
?????????????????????????????????????????????????????????? ╚═════???????????══════╝??? ??? ??? ??? ??? ??? ??? ??? ??? ??

Edit the Expression & Text to see matches. Roll over matches or the expression for details. PCRE & JavaScript flavors of RegEx are supported. Validate your expression with Tests mode.

After Remove:

RegExr was created by gskinner.com, and is proudly hosted by Media Temple.



Edit the Expression & Text to see matches. Roll over matches or the expression for details. PCRE & JavaScript flavors of RegEx are supported. Validate your expression with Tests mode.

I already tried:

/[^\x00-\x7F]/gu
/([p{L}|p{N}|p{S}|p{M}p{P}])/gu
/[WD]/g

Answer 1

const dirty_string = 'your string';

const unwanted_chars_regex = /[^wds.&,]/g;
const clean_string = dirty_string.replace(unwanted_chars_regex, '');

Regex explanation:

[^] - group of NEGATIVE selection (whatever is in this group WILL NOT be selected)
w - Letter
d - Digit
s - Whitespace
. - Dot (Does not need to be escaped inside a group [])
& - Ampersand
, - Comma
g - global flag (matching all results and not just the first result)