@thi.ng/date/checks.js

Datetime types, relative dates, math, iterators, composable formatters, locales

import { implementsFunction } from "@thi.ng/checks/implements-function";
import { isNumber } from "@thi.ng/checks/is-number";
import { isString } from "@thi.ng/checks/is-string";
const ensureDate = (x) => isString(x) || isNumber(x) ? new Date(x) : implementsFunction(x, "toDate") ? x.toDate() : x;
const ensureEpoch = (x) => (implementsFunction(x, "getTime") ? x : ensureDate(x)).getTime();
const isLeapYear = (year) => !(year % 4) && (!!(year % 100) || !(year % 400));
export {
  ensureDate,
  ensureEpoch,
  isLeapYear
};