Validating a url path with regex and excluding special characters

I’m trying to write up an expression that starts with a ‘#" and takes in the following types of paths and only takes in a character A-z/a-z and doesn’t accept digits or special characters:
Example valid paths:

#/
#/word/word
#/word
#/word/word/word

This is what I have currently:

#\/\D+|\/\D+

I have also tried:

#\/\D+|\s\/^[A-Za-z\s]*$

It filters 85% of the paths correctly but it still accepts paths with special characters as valid such as "#/word/word?test=word" "#/word/word=%"

I’m not quite sure what I am missing.

>Solution :

I would phrase the regex as:

^(?:#/|#/[A-Za-z]+(?:/[A-Za-z]+)*)$

This regex says to match:

• ^ from the start of the string
• (?:
  • #/ match #/ by itself
  • | OR
  • #/ match #/
  • [A-Za-z]+ followed by a path name
  • (?:/[A-Za-z]+)* followed by zero or more other paths
• )
• $ end of the string