Plugin to modify the cart details on WooCommerce checkout page

The customer cannot edit the quantity of the product or delete it. So I want to provide the functionality of changing the quantity and delete the product without having your customer leave the Checkout page.
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What's included

Within the download you'll find the following directories and files, logically grouping common assets and providing both compiled and minified variations. You'll see something like this:

Modify-the-cart-details-o-WooCommerce-Checkout-Page/
└── assets/
    ├── css/
    │   ├── edit-checkout.css
    │   
    │ 
    └── js/
        ├── add_quantity.js
└── index.php

Installation

1. add the project-files to wp-content/plugins/
2. activate the plugin in the wordpress-project
3. check the checkout-page in your WooCommerce Shop