Wrapping things in JS

2025-02-21 Friday (Updated on 2025-03-05 Wednesday)

This helper memo outlines how to approach encapsulating content in Javascript.

Quick Rules

• Use a module with top-level variables and functions to access them when you want singleton behavior and there is no need for instances.
• Use a module with top-level execution when code should run immediately and other parts of the app will never be affected by it.
• Use a class (i.e. function) when you need full control and multiple instances.
• Use a singleton class when you need full control and one instance.
• Use a function for reusable, stateless behavior that doesn't need an instance.