for(var i in obj) return false; 
return true;

return JSON.stringify(obj) === '{}';

return Object.keys(obj).length === 0;

return Object.entries(obj).length === 0;

return Object.getOwnPropertyNames(obj).length === 0;

return Object.keys(obj).length === 0 && obj.constructor === Object;

return typeof obj === "undefined" || !Object.keys(obj)[0];

return Object.entries(obj).length === 0 && obj.constructor === Object;

return Object.values( obj  ).every( val => typeof val === "undefined" );

for (const key in obj) {
    if (hasOwnProperty.call(obj, key)) {
      return false
    }
}
return true;

for(var prop in obj) {
  var isEmpty = true;
  for (keys in obj) {
     isEmpty = false;
     break;
  }
  return isEmpty;
}

for(var prop in obj) {
    if(obj.hasOwnProperty(prop))
      return false;
}

return true;

for (var k in obj)
{ 
    if (obj === null || typeof obj !== 'object' ||
      Object.prototype.toString.call(obj) === '[object Array]') {
    return false
} else {
    for (var prop in obj) {
      if (obj.hasOwnProperty(prop)) {
        return false
      }
    }
    return JSON.stringify(obj) === JSON.stringify({})
  } 
}

return Object.getOwnPropertyNames(obj).length === 0 &&
       Object.getOwnPropertySymbols(obj).length === 0 &&
       Object.getPrototypeOf(obj) === Object.prototype; 

return !(Object.getOwnPropertyNames != undefined ? Object.getOwnPropertyNames(obj).length != 0 : (function(){for(var key in obj) break; return (key != null) && (key != undefined);})())

return $.isEmptyObject(obj);

return _.isEmpty(obj);