Replace empty string to undefined value in Object (JS)

 const replaceEmpty = (obj) => { let newObj = {}; Object.keys(obj).forEach((key) => { if (obj[key] === Object(obj[key])) newObj[key] = removeEmpty(obj[key]); else if (obj[key] !== undefined) newObj[key] = obj[key]; else if (obj[key] === undefined) newObj[key] = ''; }); return newObj; };