Implementation of JavaScript `Map` with `size` limit

MapWithLimit.ts

export class MapWithLimit<K = any, V = any> extends Map<K, V> {
  readonly #limit: number

  constructor(limit = 10, entries?: readonly (readonly [K, V])[] | null) {
    super(entries);
    this.#limit = limit;
  }

  set(key: K, value: V): this {
    if (this.size + 1 > this.#limit) {
      const firstKey = this.keys().next().value;
      if (firstKey) {
        this.delete(firstKey);
      }
    }

    super.set(key, value);
    return this;
  }
}