A graceful little addition of the total Basket weight in at Magento 2 Checkout. Facilitated with Magento's Mixins. This is based of the Luma theme for the Native mini-cart display - so with custom themes your so milage may vary :)
Unzip the MackieeE Vendor folder into your "app" folder.
/app/code/MackieeE/SidebarWeight/
Then run the Magento Upgrade command:
php bin/magento setup:upgrade