Inconsistent isSlug results with "." in the inputs

[Zhuochengyu]

Describe the bug
A clear and concise description of what the bug is.
IsSlug shows inconsistent results when I put "." in the inputs.

Examples
If applicable, add screenshots to help explain your problem.

> isSlug('i.am.not.a.slug')
false
> isSlug('slug.is.cool')
true

Additional context
Validator.js version: 13.11.0
Node.js version: v18.15.0
OS platform: macOs 12.6.3

[alinaghale88]

@Zhuochengyu I have raised a pull request for the bug reported if you would like to review.

[jfaMan]

@alinaghale88 @Zhuochengyu I came looking for an issue with iSlug as basically anything with a special character was passing for me. When using special characters, I noticed that the regex will only fail if the second character is a special character like in your first example. Any other position and it doesn't get caught. I think it has to do with the fact that the regex also requires the string to be at least 3 characters long. Once it's 3 characters long, special characters are not caught like your second example.