Implementing Stacks & Queues

What encapsulation pattern is demonstrated in this Stack implementation?

class Stack {
  #items = [];
  
  push(element) {
    this.#items.push(element);
  }
  
  pop() {
    return this.#items.pop();
  }
  
  peek() {
    return this.#items[this.#items.length - 1];
  }
}

Public properties
Private methods
Private fields
This demonstrates private fields because: 1) Uses # prefix to declare private class field, 2) Prevents direct access to internal array from outside, 3) Forces use of public methods for stack operations, 4) Maintains data structure integrity, 5) Implements proper encapsulation principles, 6) Prevents unauthorized modification of stack contents, 7) Follows modern JavaScript class privacy features, 8) Important for creating robust data structures.
Protected members

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