Centralized Summary of JS Regular Expression Validation Password Format

1. The password must be 6-18 letters, numbers and special symbols:

var reg =/^(?=.*[a-zA-Z])(?=.*\d)(?=.*[~!@#$%^&*()_+`\-={}:";'<>?,.\/]).{6,18}$/;

2. Password must be 6-18 letters and numbers

var reg=/^(?![^a-zA-Z]+$)(?!\D+$)/

3. Support letters, numbers, punctuation marks and special characters

var reg=/^(?:(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])|(?=.*[A-Z])(?=.*[a-z])(?=.*[^A-Za-z0-9])|(?=.*[A-Z])(?=.*[0-9])(?=.*[^A-Za-z0-9])|(?=.*[a-z])(?=.*[0-9])(?=.*[^A-Za-z0-9])).{6,}|(?:(?=.*[A-Z])(?=.*[a-z])|(?=.*[A-Z])(?=.*[0-9])|(?=.*[A-Z])(?=.*[^A-Za-z0-9])|(?=.*[a-z])(?=.*[0-9])|(?=.*[a-z])(?=.*[^A-Za-z0-9])|(?=.*[0-9])(?=.*[^A-Za-z0-9])|).{6,}$/