Method has

src/MapProxyHandler.ts:20–25

(target: Map<number | string, V>, p: string | symbol)

  }

  has(target: Map<number | string, V>, p: string | symbol): boolean {
    if (typeof p === "symbol") return false

    const int = parseInt(p, 10)
    return target.has(!isNaN(int) ? int : p)
  }

  ownKeys(target: Map<number | string, V>): ArrayLike<string | symbol> {
    return [...target.keys()].map(String)