JavaScript Modules (import/export)

What module encapsulation pattern is illustrated here?

// settings.js
let config = { debug: false };
export const getConfig = () => ({ ...config });
export const setConfig = (newConfig) => {
  config = { ...newConfig };
};

Global state management
Module caching
Private state with controlled access
This code illustrates the private state with controlled access pattern: 1) The config object is private to the module, not exported directly, 2) Access to config is only through controlled getter and setter functions, 3) The getter returns a copy to prevent direct mutation of internal state, 4) The setter accepts a new configuration and creates a fresh copy, 5) This pattern provides encapsulation of module state while allowing controlled access, 6) It prevents accidental modifications to the internal state, 7) It's a common pattern for managing module-level configuration or state.
Singleton pattern

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