Required regex pettern like
- allow only letters with min 1 dot and maximum 3 dots.
- allow optional as '-' special character.
Ex: raj.gopal-reddy or raj.reddy.gopal
Regex pattern in JavaScript to test for dots/hyphens in names
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Your current regex is on the right track, and I would use a negative lookahead to assert that more than three dots do not occur. Consider this pattern: