check-password-strength
A NPM Password strength checker based from Javascript RegExp. Check passphrase if it's "Too weak", "Weak", "Medium" or "Strong"
passwordmeter
Password security checker function based on http://www.passwordmeter.com/
haveibeenpwned-checker
haveibeenpwned-checker validate email addresses, usernames, and passwords if they have previously been exposed in data breaches. based on https://haveibeenpwned.com