Can anyone help me with a javascript regular expression that satisfies the following conditions (it is to validate input in textarea):

1. there should be minimum 3 characters
2. the first character is always /
3. the entire input string shouldnot match the exact string '/abc' and '/xyz' but it can be anyother like /abce or /abct etc...

Ex: the input such as /xyzw, /ab, /abcd, /asdad are accepted and such as /a, /abc etc. are not accepted

Can anyone help me with a javascript regular expression that satisfies the following conditions (it is to validate input in textarea):

1. there should be minimum 3 characters
2. the first character is always /
3. the entire input string shouldnot match the exact string '/abc' and '/xyz' but it can be anyother like /abce or /abct etc...

Ex: the input such as /xyzw, /ab, /abcd, /asdad are accepted and such as /a, /abc etc. are not accepted

• javascript
• regex

• /^\/(?!abc$|xyz$)[\S\s]{2,}/ – Rob W Commented Feb 20, 2012 at 14:19
• 1 Your condition 3 needs clarification. It can't match /xyz but then later that is ok? – YXD Commented Feb 20, 2012 at 14:20

1 Answer 1

/^\/(?!abc$|xyz$)[\S\s]{2,}/

Meaning:

/             
^             Start of string
\/            "/"
(?!abc$|xyz$) Not followed by only abc or xyz ($ = end of string)
[\S\s]{2,}    At least two characters.
/