Regexp with formvalidation changes result after each character

Asked Apr 13 '20 at 18:29

Active Apr 13 '20 at 18:29

Viewed 8 times

I am trying to use a validator on a input text for a file name using a regexp.

This is the regexp /^[^<>:"\/\\|?*]*$/gi

It should return false if any of the chars in [] are present.

While using FormValidation (https://formvalidation.io/) slightly older version, I see the following behaviour

If I have ANY invalid character (eg, : \ etc) the input will always be invalid (great)
If I have ONLY valid characters, the validator says that the field is invalid and then valid after each character I type (bad)

Example

"a" -> valid
"ab" -> invalid
"abc" -> valid
"abcd" -> invalid

It's swapping between valid/invalid for no reason.

Is this is a regexp issue or the formvalidator plugin?

asked Apr 13 '20 at 18:29

terratermatwoa

1

Remove the `g` flag. – Wiktor Stribiżew Apr 13 '20 at 18:30
Thank you. Why does it work on the test site? – terratermatwoa Apr 13 '20 at 19:32
A lot works on a test site. It does not mean the regex will work in the target environment. But the point is that at a regex testing site, you test against a *single multiline string*, while in code, you test it on a set of individual strings. – Wiktor Stribiżew Apr 13 '20 at 19:33

0 Answers0