uclass is a 'before ES6' class syntax that mimics mootools/base.js & Class.Mutator.Bind syntax. There is no runtime overload as this is just a syntax wrapper around javascript native Prototype.
Feel free to switch to a ES6 classes / Typescript anytime a
The jsbn library is a fast, portable (through browserify) implementation of large-number math in pure JavaScript, enabling public-key crypto and other applications on desktop and mobile browsers.