Extends moment.js with isBeforeOrSame or isAfterOrSame methods.

Moment.js with isBeforeOrSame and isAfterOrSame

(function (root, factory) {
  'use strict';
  if (typeof define === 'function' && define.amd) {
    // AMD. Register as an anonymous module.
    define(['moment'], factory);
  } else if (typeof exports === 'object') {
    // Node. Does not work with strict CommonJS, but
    // only CommonJS-like environments that support module.exports,
    // like Node.
    module.exports = factory(require('moment'));
  } else {
    // Browser globals (root is window)
    root.returnExports = factory(root.moment);
  }
}(this, function (moment) {
  'use strict';

  moment.fn.isBeforeOrSame = function (input, units) {
    units = typeof units !== 'undefined' ? units : 'millisecond';
    return +this.clone().startOf(units) <= +moment(input).startOf(units);
  }

  moment.fn.isAfterOrSame = function (input, units) {
    units = typeof units !== 'undefined' ? units : 'millisecond';
    return +this.clone().startOf(units) >= +moment(input).startOf(units);
  }

  return moment;
}));