Login validation using js

validate.js

function validateLoginForm() {
  const usernameInput = document.getElementById('username');
  const passwordInput = document.getElementById('password');

  const username = usernameInput.value.trim();
  const password = passwordInput.value.trim();

  if (username === '' || password === '') {
    alert('Please fill in all fields.');
    return false;
  }

  return true;
}

const loginForm = document.getElementById('login-form');
loginForm.addEventListener('submit', function(event) {
  if (!validateLoginForm()) {
    event.preventDefault();
  }
});