About A javascript class to add, remove and increment products in the shopping cart. The class stores the shopping cart data in the local storage of the browser.

Yet another javascript Class for managing class-based inheritance. It's mostly based on Prototype's Class (but independent of Prototype.js and in fact fully "framework-agnostic") with some ideas from ...

Private class fields are finally coming to JavaScript with no less than three separate TC39 proposals that define the new capabilities.