Modify this regex to accept 0 to 15 characters?

Question

I have a regex like this:

var filter = /^[ A-Za-z0-9_@./#&+-]*$/;

I want this regex to return true if there is no character on input field or if there is character less than 14. I tried using this:

var filter = /^[ A-Za-z0-9_@./#&+-]{0, 15}*$/;

But this regex is never returning true. It always return false even after I satisfy the condition. What's wrong?

Answer 1

Whitespace is significant in a regular expression. The space character makes your {n,m} quantifier invalid, causing {0, 15}* to be evaluated as the literal string "{0, 15", followed by zero or more }s.

Also, you can condense [A-Za-z0-9_] into \w:

var filter = /^[ \w@./#&+-]{0,15}$/;

Answer 2

Try this one.........

^\w{1,15}$