Writing Static Classes

type Config = {
  instances: number;
};

class Task {
  static #nextId = 0;
  static #maxInstances: number;
  #id: number;

  static {
    fetch("/available-slots")
      .then((res) => res.json())
      .then((result: Config) => {
        Task.#maxInstances = result.instances;
      });
    }

  constructor() {
    if (Task.#nextId > Task.#maxInstances) {
      throw "Max number of tasks reached";
    }
    this.#id = Task.#nextId++;
  }
}