JS uses regular expression to verify the security of user and password, generate random verification code

Created a form that validates the user, password, random verification code

HTML page

CS Style Sheet

Validating user methods

Ways to verify passwords

How to generate a verification code

How to verify the verification code

Ways to read users and Passwords

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The above verification method is called when the focus is lost, the Defocus verification passes, the submission displays the user and the password

JS uses regular expression to verify the security of user and password, generate random verification code