Character limit in a regular expression Javascript

Regular expression requirements:

• from 3 to 5 characters,

• at least one capital letter,

  MEDevel.com: Open-source for Healthcare and Education

  Collecting and validating open-source software for healthcare, education, enterprise, development, medical imaging, medical records, and digital pathology.

  Visit Medevel

• and at least one number.

My expression now looks like this.
The character limit does not work.

/((?=.*[A-Z])(?=.*\d)){3,5}/

>Solution :

{3,5} has to be after a pattern that matches something. You put it after lookaheads, which don’t match anything by themselves. Put a . before it to match a character. And you also need to anchor the regexp so it will match the entire input, not just part of it.

/((?=.*[A-Z])(?=.*\d))^.{3,5}$/