Method isValid

src/read_preference.ts:202–213

* Validate if a mode is legal * * @param mode - The string representing the read preference mode.

(mode: string)

   * @param mode - The string representing the read preference mode.
   */
  static isValid(mode: string): boolean {
    const VALID_MODES = new Set([
      ReadPreference.PRIMARY,
      ReadPreference.PRIMARY_PREFERRED,
      ReadPreference.SECONDARY,
      ReadPreference.SECONDARY_PREFERRED,
      ReadPreference.NEAREST,
      null
    ]);

    return VALID_MODES.has(mode as ReadPreferenceMode);
  }

  /**
   * Validate if a mode is legal