# src/zones/localZone.js

    import { Util } from '../impl/util';
    import { Zone } from '../zone';

    let singleton = null;

    /**
     * @private
     */

    export class LocalZone extends Zone {
      static get instance() {
        if (singleton === null) {
          singleton = new LocalZone();
        }
        return singleton;
      }

      get type() {
        return 'local';
      }

      get name() {
        if (Util.isUndefined(Intl) && Util.isUndefined(Intl.DateTimeFormat)) {
          return new Intl.DateTimeFormat().resolvedOptions().timeZone;
        } else return 'local';
      }

      get universal() {
        return false;
      }

      offsetName(ts, { format = 'long', locale = 'en-US' } = {}) {
        return Util.parseZoneInfo(ts, format, locale || 'en-US');
      }

      offset(ts) {
        return -new Date(ts).getTimezoneOffset();
      }

      equals(otherZone) {
        return otherZone.type === 'local';
      }

      get isValid() {
        return true;
      }
    }