Hello.
I am a full-stack web developer.
I have been working as a full-stack developer for more than 6 years.
Can you send me a link to your website? What javascript changes do you want?
And based on analyzing your website, other things I can set an optimal bid amount terms.
I have been making a lot of the same things as you wish in your project.
I have a lot of experience in PHP, Javascript, jQuery, HTML5, CSS, Wordpress, WooCommerce, Joomla, Prestashop, Opencart, Drupal, Magento, React.js, React Native, mobile development.
Thank you for your time.