What is the Revealing Module Pattern and what problem does it solve?

Question

JavaScript Developer — Hard

What is the Revealing Module Pattern and what problem does it solve?

Accepted Answer

The Revealing Module Pattern is an IIFE-based pattern that exposes only selected functions and variables as a public API, keeping the rest private in closure scope. This solves the issue of global namespace pollution and enforces encapsulation. It was especially useful before ES modules were introduced.