Ajax cart for Magento 2 makes Magento cart UI absolutely friendly for customers to add products to cart or remove items from cart without page reload. From this, your customers will find it convenient, exciting and time-saving to buy the products on your site.Ajax Cart extension works with all product types: simple products, virtual products, downloadable products, grouped products, configurable products, bundle products.
For M1 : https://www.magesolution.com/magento-ajax-cart.html
Enable/Disable Magento Ajax Cart module
Two options for ajax mode: Fly cart and Show Popup
Display or not display Upsell product on popup
Display or not display "Checkout" button, "View Shopping Cart" link, "Continue Shopping" button
Edit message visible on popup
Specially, Magento Ajax cart extension is designed to not overwrite any files of Magento template. So, you can use this Magento extension for a lot of different Magento themes.
Magento Ajax Add To Cart supports Magento multi-stores
It also supports Magento store with multi-languages
It’s designed and coded with 100% open source code
It’s very easy to install and configure
It’s designed to have Magento Cart UI an absolutely friendly interface.
Source code is validated with W3C standard