In JavaScript, to check if an object has one or more properties, you can use Object.keys as shown below.

var hoge = { 
    fuga: 1,
    moga: 2,
};

console.log(Object.keys(hoge).length === 2); // true

【Reference】

・javascript の オブジェクトが空かどうかを調べる場合 - Node.js日誌β

・keys | Mozilla Developer Network

That’s all from the Gemba.