1
Assuming you're getting product_id from ajax call then I think there is a minor problem in your jquery. It should be $(".product-id-"+wislistAddedProductId).addClass('in-wishlist') not
$(".product-id"+wislistAddedProductId).addClass('in-wishlist'). Check your div class name. Try below :
<script>
require(['jquery'], function($){
...
1
as discussed, i see that a few corrections are needed:
you should call the 'test_testmodule/index/test' url as you defined your frontName as 'test_testmodule'
you should use the 'standard' routerId if you are working on the frontend side with this call
you are expecting a JSON formatted response as per your AJAX call definition, so you will have to format ...
1
Using a custom controller to change Wishlist button(icon) color once the product added to Wishlist.
app/code/vendor/module/Controller/Index/Wishlist.php
<?php
namespace Vendor\Module\Controller\Index;
class Wishlist extends \Magento\Framework\App\Action\Action {
public function __construct(
\Magento\Framework\App\Action\Context $context,
...
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