Password Strength Validation function for Javascript/Typescript with configurable options

verifyPasswordStrength.js

const passwordConfig = Object.freeze({
    minLength: 8,
    atleaseOneLowercaseChar: true,
    atleaseOneUppercaseChar: true,
    atleaseOneDigit: true,
    atleaseOneSpecialChar: true,
});

function verifyPasswordStrength(password) {
    if (
        passwordConfig.minLength &&
        password.length < passwordConfig.minLength
    ) {
        throw new Error(
            `Your password must be at least ${passwordConfig.minLength} characters`
        );
    }

    if (
        passwordConfig.atleaseOneLowercaseChar &&
        password.search(/[a-z]/i) < 0
    ) {
        throw new Error(
            "Your password must contain at least one lowercase character."
        );
    }

    if (
        passwordConfig.atleaseOneUppercaseChar &&
        password.search(/[A-Z]/) < 0
    ) {
        throw new Error(
            "Your password must contain at least one uppercase character."
        );
    }

    if (passwordConfig.atleaseOneDigit && password.search(/[0-9]/) < 0) {
        throw new Error("Your password must contain at least one digit.");
    }

    if (passwordConfig.atleaseOneSpecialChar && password.search(/\W/) < 0) {
        throw new Error(
            "Your password must contain at least one special character."
        );
    }
};