Module Scope and Privacy

Module Scope

Variables declared in a module are private to that module by default. Only explicitly exported values are accessible to other modules.

Example

// counter.js
let count = 0; // Private — not accessible outside

function increment() {
  count++;
}

function decrement() {
  count--;
}

function getCount() {
  return count;
}

// Only export the public interface
export { increment, decrement, getCount };

// Importers cannot access `count` directly — encapsulation!

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Pro Tip

Module scope is the native JS equivalent of the revealing module pattern — private by default, public by choice.

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