Static & Private Class Fields

What privacy pattern is demonstrated?

class Widget {
  #state;
  
  constructor(initialState) {
    this.#state = initialState;
  }
  
  #updateState(newState) {
    this.#state = {...this.#state, ...newState};
    this.#notifyUpdate();
  }
  
  #notifyUpdate() {
    // Update logic
  }
}

Public methods with private data
Private methods and fields
This demonstrates comprehensive private implementation: 1) Private field (#state) for data encapsulation, 2) Private methods (#updateState, #notifyUpdate) for internal operations, 3) Cohesive private implementation details, 4) Clear separation between public and private APIs, 5) Protected internal state with controlled updates, 6) Private methods can access other private members freely within the class.
Static privacy
Module privacy

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