Regex for a (twitter-like) hashtag that allows non-ASCII characters

Question

I want a regex to match a simple hashtag like that in twitter (e.g. #someword). I want it also to recognize non standard characters (like those in Spanish, Hebrew or Chinese

Answer 1

With native JS regexes that don't support unicode, your only option is to explicitly enumerate characters that can end the tag and match everything else, for example:

> s = "foo #הַתִּקְוָה. bar"
"foo #הַתִּקְוָה. bar"
> s.match(/#(.+?)(?=[\s.,:,]|$)/)
["#הַתִּקְוָה", "הַתִּקְוָה"]

The [\s.,:,] should include spaces, punctuation and whatever else can be considered a terminating symbol.