Show popup message before check for login

Question

I tried to show a popup message when customer tried to login. I add some code in LoginPost.php like in code below but it's not work.

LoginPost.php :

try {
      echo "  <script type='text/javascript'>
              alert('adadasd'); //This code i tried to popup a message
              </script>";

      $customer = $this->customerAccountManagement->authenticate($jsonObject[0]->EMAILOWNER, $jsonObject[0]->PASSWORDOWNER);
      $this->session->setCustomerDataAsLoggedIn($customer);
      $this->session->regenerateId();
      setcookie("Role", $jsonObject[0]->ROLE, time() + (86400 * 30), "/");
      if ($this->getCookieManager()->getCookie('mage-cache-sessid')) {
         $metadata = $this->getCookieMetadataFactory()->createCookieMetadata();
         $metadata->setPath('/');
         $this->getCookieManager()->deleteCookie('mage-cache-sessid', $metadata);
      }

How can i show a popup there? So the login will not continue before the customer click the popup message?

Answer 1

Use this js code in your custom.js

require([ 'jquery', 'jquery/ui'], function($){
    jQuery('.action.login.primary').on('click',function(){
         confirm('Do you want to continue the process?');
    });
});