JavaScript Js regex for password validation match regex password validation python,regex password validation javascript,regex password

Your regex is wrong, there are 2 mistakes you made:

(?=.[a-z]) is looking ahead for a single character followed by a lowercase letter, but your intention is to find a lowercase letter in the string, so the . should be modified by * (0 or more times)

(?=.[_\W\S]) is looking ahead for a single character followed by either underscore or a non-word or a non-space, which is litereally everything. This seems to be your check for a symbol, but it will always match (if there are at least 2 characters). I would use a negation to achieve this, like (?=.*[^a-zA-Z0-9\s])

This leads to the following regex

/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[^a-zA-Z0-9\s]).{8,}$/

You can look at https://regex101.com/r/dG9xL8/1 for a demo.

Answer:1

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