I want to use custom error messages on a login page (Such as required field, incorrect e-mail adress)

I used spring security to login and javascript to validate the fields. The validation error messages are working, but the login process does not work anymore. I think because of; e.preventDefault();

How do i continue the login process when all the fields are valid.

This is my js file;

"use strict";
window.onload = function () {

const form = document.getElementById('form');
const email = document.getElementById('email');
const password = document.getElementById('password');

form.addEventListener('submit', e => {
    e.preventDefault();
    validateInputs();
});

const setError = (element, message) => {
    const inputControl = element.parentElement;
    const errorDisplay = inputControl.querySelector('.error');

    errorDisplay.innerText = message;
    inputControl.classList.add('error');
    inputControl.classList.remove('success')
}

const setSuccess = element => {
    const inputControl = element.parentElement;
    const errorDisplay = inputControl.querySelector('.error');

    errorDisplay.innerText = '';
    inputControl.classList.add('success');
    inputControl.classList.remove('error');
};

const isValidEmail = email => {
    const re = /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    return re.test(String(email).toLowerCase());
}

function validateInputs() {
    const emailValue = email.value.trim();
    const passwordValue = password.value.trim();

    if (emailValue === '') {
        setError(email, 'Email is required');
    } else if (!isValidEmail(emailValue)) {
        setError(email, 'Provide a valid email address');
    } else {
        setSuccess(email);
    }

    if (passwordValue === '') {
        setError(password, 'Password is required');
    } else {
        setSuccess(password);
    }

}

}