Object.keys along with length can be used to check whether the object is empty or not in JavaScript. Please check the following code for reference.

Sample JavaScript:

function emptyObjectCheck( obj ) {

	if ( Object.keys( obj ).length > 0 ) {

		console.log(
			'Object is not empty'
		);
		
	} else {

		console.log(
			'Object is empty'
		);
		
	}

}

let car = {};

emptyObjectCheck( car );

car [ 'make' ] = 'Honda';
car [ 'year' ] = 2000;
car [ 'color' ] = 'white';

emptyObjectCheck( car );