How to use the globalize.formatDate function in globalize

var like;
var Globalize = require("globalize");

/**
 * Date
 */

// Use dateFormatter.
var dateFormatter = Globalize.dateFormatter({time: "medium"});
console.log(dateFormatter(new Date()));

// Use formatDate.
console.log(Globalize.formatDate(new Date(), {date: "medium"}));

// Use formatDate in specific time zones.
console.log(Globalize.formatDate(new Date(), {
	datetime: "full",
	timeZone: "America/Sao_Paulo"
}));

// Use dateToPartsFormatter.
var dateToPartsFormatter = Globalize.dateToPartsFormatter({time: "long"});
console.log(dateToPartsFormatter(new Date()));

// Use formatDateToParts.
console.log(Globalize.formatDateToParts(new Date(), {date: "long"}));

// Use dateParser in specific time zones.
var dateParser = Globalize.dateParser({skeleton: "MMMd", timeZone: "America/New_York"});

require( "cldr-data/main/en/dateFields" ),
	require( "cldr-data/main/en/numbers" ),
	require( "cldr-data/main/en/units" ),
	require( "cldr-data/supplemental/currencyData" ),
	require( "cldr-data/supplemental/likelySubtags" ),
	require( "cldr-data/supplemental/plurals" ),
	require( "cldr-data/supplemental/timeData" ),
	require( "cldr-data/supplemental/weekData" )
);
Globalize.loadMessages( require( "./messages/en" ) );

// Set "en" as our default locale.
Globalize.locale( "en" );

// Use Globalize to format dates.
console.log( Globalize.formatDate( new Date(), { datetime: "medium" } ) );

// Use Globalize to format numbers.
console.log( Globalize.formatNumber( 12345.6789 ) );

// Use Globalize to format currencies.
console.log( Globalize.formatCurrency( 69900, "USD" ) );

// Use Globalize to get the plural form of a numeric value.
console.log( Globalize.plural( 12345.6789 ) );

// Use Globalize to format a message with plural inflection.
like = Globalize.messageFormatter( "like" );
console.log( like( 0 ) );
console.log( like( 1 ) );
console.log( like( 2 ) );
console.log( like( 3 ) );

require( "cldr-data/supplemental/plurals" ),
	require( "cldr-data/supplemental/timeData" ),
	require( "cldr-data/supplemental/weekData" )
);
Globalize.loadMessages( require( "./messages/en" ) );

Globalize.loadTimeZone( require( "iana-tz-data" ) );

// Set "en" as our default locale.
Globalize.locale( "en" );

// Use Globalize to format dates.
console.log( Globalize.formatDate( new Date(), { datetime: "medium" } ) );

// Use Globalize to format dates in specific time zones.
console.log( Globalize.formatDate( new Date(), {
	datetime: "full",
	timeZone: "America/Sao_Paulo"
}));

// Use Globalize to format dates to parts.
console.log( Globalize.formatDateToParts( new Date(), { datetime: "medium" } ) );

// Use Globalize to format numbers.
console.log( Globalize.formatNumber( 12345.6789 ) );

// Use Globalize to format numbers (compact form).
console.log( Globalize.formatNumber( 12345.6789, {
	compact: "short",
	minimumSignificantDigits: 1,
	maximumSignificantDigits: 3
}));

'assert method that takes a value'() {
				const locale = 'fr';
				const value = new Date();
				const options: DateFormatterOptions = { datetime: 'full' };

				assert.strictEqual(globalizeDelegator('formatDate', { value }), Globalize.formatDate(value));
				assert.strictEqual(
					globalizeDelegator('formatDate', {
						optionsOrLocale: options,
						value
					}),
					Globalize.formatDate(value, options)
				);
				assert.strictEqual(
					globalizeDelegator('formatDate', {
						locale,
						optionsOrLocale: options,
						value
					}),
					new Globalize('fr').formatDate(value, options)
				);
			},

'assert method that takes a value'() {
				const locale = 'fr';
				const value = new Date();
				const options: DateFormatterOptions = { datetime: 'full' };

				assert.strictEqual(globalizeDelegator('formatDate', { value }), Globalize.formatDate(value));
				assert.strictEqual(
					globalizeDelegator('formatDate', {
						optionsOrLocale: options,
						value
					}),
					Globalize.formatDate(value, options)
				);
				assert.strictEqual(
					globalizeDelegator('formatDate', {
						locale,
						optionsOrLocale: options,
						value
					}),
					new Globalize('fr').formatDate(value, options)
				);
			},