Static & Private Class Fields

What pattern is implemented using private members?

class Connection {
  #config;
  #retryCount = 0;
  static #MAX_RETRIES = 3;
  
  constructor(config) {
    this.#config = config;
  }
  
  async #connect() {
    while (this.#retryCount < Connection.#MAX_RETRIES) {
      try {
        // Connection logic
        return;
      } catch (e) {
        this.#retryCount++;
        await new Promise(r => setTimeout(r, 1000 * this.#retryCount));
      }
    }
    throw new Error('Connection failed');
  }
}

Observer pattern
Factory pattern
Retry pattern with backoff
This implements retry pattern with private state: 1) Retry count is privately maintained, 2) Maximum retries is protected constant, 3) Connection logic is encapsulated, 4) Retry mechanism cannot be tampered with, 5) Configuration is protected, 6) Implements exponential backoff securely.
Decorator pattern

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