4.1 Using GNU ease.js Classes Outside of ease.js
GNU ease.js is a prototype generator—it takes the class definition,
applies its validations and conveniences, and generates a prototype and
constructor that can be instantiated and used just as any other ECMAScript
constructor/prototype. One thing to note immediately, as mentioned in
the section Defining Classes, is that constructors
generated by ease.js may be instantiated either with or without the
ease.js convention is to omit the keyword for more concise code that is more easily chained, but you should follow the coding conventions of the project that you are working on.