// useful regular expressions useful regular expressions email let emailPattern = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+.[a-zA-Z]{2,}$/; password let passwordLength = /^[a-zA-Z0-9._%+-]{8,}$/ let passwordUppercase = /[A-Z]+/ let passwordLowercase = /[a-z]+/ let passwordNumeric = /[0-9]+/