@tubular/time/ambient.d.ts

Date/time, IANA timezones, leap seconds, TAI/UTC conversions, calendar with settable Julian/Gregorian switchover

// noinspection JSUnusedGlobalSymbols

interface String {
  /**
   * Gets a substring beginning at the specified location and having the specified length.
   * (deprecation removed)
   * @param from The starting position of the desired substring. The index of the first character in the string is zero.
   * @param length The number of characters to include in the returned substring.
   */
  substr(from: number, length?: number): string;
}