Redirecting a user to a specific page using a JS

I am trying to re-direct a user to “company page” or “market page” as the below code explain but unfortunately it did not do anything it just delete the form details without taking the needed action I tried to change the if statement but it did not work:

const form = document.getElementById("regForm");
const position = document.getElementById("spain");
const submitButton = document.querySelector("button[type='submit']");
const checkbox = document.querySelector("input[type='checkbox']");
const usernameInput = document.querySelector("input[name='name']");
const passwordInput = document.querySelector("input[name='password']");
const emailInput = document.querySelector("input[name='email']");
const usernameRegex = /^S+$/;
const passwordRegex = /^(?=.*d)(?=.*[a-z])(?=.*[A-Z])(?=.*[^a-zA-Z0-9]).{8,}$/;
const emailRegex = /^[^s@]+@[^s@]+.[^s@]+$/;

const userNameError = document.getElementById("username-error");
const emailError = document.getElementById("email-error");
const passError = document.getElementById("pass-error");
const checkError = document.getElementById("check-error");
const inputError = document.querySelector(".input-error");
// Set a flag to keep track of whether an option has been selected from the dropdown menu
//let dropdownSelected = false;
console.log('before form');
form.addEventListener("submit", (event) => {
  // Validate form fields
  if (!isFormValid()) {
    event.preventDefault();
    return;
  }
  // Save form data to local storage
  const formData = {
    username: usernameInput.value,
    password: passwordInput.value,
    email: emailInput.value,
    position: position.value,
  };
  localStorage.setItem("formData", JSON.stringify(formData));
  sessionStorage.setItem("info", JSON.stringify(formData));
  if(position.value==="Company"){
    window.location.href ='../HTML/companyPage.html';
  }
  else {window.location.href ='../HTML/marketPage.html';}
 console.log('yes');
  // Show welcome message
  // alert("Welcome " + formData.username);
  // Reset form
  form.reset();
});
console.log('after form')
function isFormValid() {
  if (!usernameInput.value.trim()) {
    usernameInput.classList.toggle("input-error");
    userNameError.textContent = "Please enter your username.";
    // alert("Please enter your username.");
    return false;
  } else {
    usernameInput.classList.remove("input-error");
    userNameError.textContent = "";
  }

  if (!usernameRegex.test(usernameInput.value)) {
    usernameInput.classList.toggle("input-error");
    userNameError.textContent = "Username should not contain spaces.";
    // alert("Username should not contain spaces.");
    return false;
  } else {
    usernameInput.classList.remove("input-error");
    userNameError.textContent = "";
  }

  if (!passwordInput.value.trim()) {
    passwordInput.classList.toggle("input-error");
    passError.textContent = "Please enter your password.";
    // alert("Please enter your password.");
    return false;
  } else {
    passwordInput.classList.remove("input-error");
    passError.textContent = "";
  }

  if (!passwordRegex.test(passwordInput.value)) {
    passwordInput.classList.toggle("input-error");
passError.textContent =
      "Password should have at least 8 characters with at least 1 number, uppercase, and special characters.";
    // alert("Password should have at least 8 characters with at least 1 number, uppercase, and special characters.");
    return false;
  } else {
    passwordInput.classList.remove("input-error");
    passError.textContent = "";
  }

  if (!emailInput.value.trim()) {
    emailInput.classList.toggle("input-error");

    emailError.textContent = "Please enter your email address.";
    // alert("Please enter your email address.");
    return false;
  } else {
    emailInput.classList.remove("input-error");
    emailError.textContent = "";
  }

  if (!emailRegex.test(emailInput.value)) {
    emailInput.classList.toggle("input-error");

    emailError.textContent = "Please enter a valid email address.";
    // alert("Please enter a valid email address.");
    return false;
  } else {
    emailInput.classList.remove("input-error");
    emailError.textContent = "";
  }

  if (!checkbox.checked) {
    checkbox.classList.toggle("input-error");

    checkError.textContent = "Please agree to the license terms.";
    // alert("Please agree to the license terms.");
    return false;
  } else {
    checkbox.classList.remove("input-error");
    checkError.textContent = "";
  }
return true;
}

Is there any suggestion that can help me to solve this issue