JS: Object.getOwnPropertyDescriptors

New in ES2017.

Object.getOwnPropertyDescriptors(obj)

Return property descriptors of all own properties of object obj.

[see JS: Property Attributes, writable, enumerable, configurable]

The return value is a object, with property value of descriptors.

{ k1: descriptor1, k2: descriptor2, … }

[see JS: Property Descriptor]

// object with a string key and symbol key
const xx = {
 "p":3,
 [Symbol()]:4
};

console.log(
Object.getOwnPropertyDescriptors(xx)
);

// prints
// { p:
//    { value: 3, writable: true, enumerable: true, configurable: true },
//   [Symbol()]:
//    { value: 4, writable: true, enumerable: true, configurable: true }
// }

If obj is not a object, it is first converted to a object type.

console.log( Object.getOwnPropertyDescriptors(3) );
// prints
// {}