ATLANTIC CITY, N.J. — Resorts Casino Hotel and DraftKings on Wednesday received approval to become the first companies to offer online and mobile sports betting in New Jersey.

The state Division of Gaming Enforcement gave approval to the casino and its Boston-based online partner to launch an invitation-only version of mobile sports betting, which will undergo several days of testing before becoming fully available. Requests for invitations to participate can be made at draftkings.com.

A launch was expected to happen Wednesday afternoon or evening.

The companies won a heated race to be first to market with mobile and online sports betting, which is widely seen as the most promising segment of the nascent sports betting market.

New Jersey regulators are considering mobile applications from several other companies and could soon approve additional online providers.

Four casinos and two horse tracks currently offer in-person sports betting.