What the module can do:

1. Adds "plus-minus" buttons to the input in the pop-up cart in the header of the site, when clicked, the amount of goods in the cart increases or decreases.
2. Adds the same functionality to the cart page (default page), removes the refresh button (as it won't be needed anymore).

3. Buttons have an attractive look and fit into almost any website design (this is a custom CSS style, not through bootstrap classes)

How to install the module:

1. Install the module through the standard Opencart installer in the site administration panel.
2. Update modifiers.

Demo

https://ocmod.seo-vector.com.ua/

Please buy the module only after you have seen the Demo.
I can customize to your needs. Removing these buttons on the standard shopping cart page.