object-props

• getAllProps
• getAllPropsAndSymbols
• getOwnProps
• getOwnPropsAndSymbols

Why

The example below exports a class Example. The class has several static properties, defined on multiple levels of the prototype chain but they're unfortunately not enummarable.

const symbol1 = Symbol('test1');
const symbol2 = Symbol('test2');

class Base {
  static test1 = '...';
  static test2() {
    // ...
  }
}
Base[symbol1] = '...'

class Example extends Base {
  static test3 = '...';
  static test4() {
    // ...
  }
}
Example[symbol2] = '...'

Thankfully Object.getOwnPropertyNames and Object.getOwnPropertySymbols is able to list these properties however it does not support recursive operations.

Object.getOwnPropertyNames(Example); // 5 Array ["length", "name", "prototype", "test4", "test3"]

Object.getOwnPropertySymbols(Example); // 1 Array [Symbol(test2)]

Hence, object-props was created to simply get ALL or OWN (explicitly defined and not inherited from the Object.prototype)

getAllProps

Returns an Array of names for the object and all its inherited properties.

const { getAllProps } from 'object-props';

getAllProps(Example); // 24 Array ["test4", "test3", "test2", "test1", ...all]

getAllPropsAndSymbols

Returns an Array of names and Symbols for the object and all its inherited properties.

const { getAllPropsAndSymbols } from 'object-props';

getAllPropsAndSymbols(Example); // 27 Array ["test4", "test3", Symbol(test2), "test2", "test1", Symbol(test1), ...all]

getOwnProps

Returns an Array of names for the object and its inherited properties excluding Object prototype.

const { getOwnProps } from 'object-props';

getOwnProps(Example); // 7 Array ["length", "name", "prototype", "test4", "test3", "test2", "test1"]

getOwnPropsAndSymbols

Returns an Array of names and Symbols for the object and all its inherited properties excluding Object prototype.

const { getOwnPropsAndSymbols } from 'object-props';

getOwnPropsAndSymbols(Example); // 9 Array ["length", "name", "prototype", "test4", "test3", Symbol(test2), "test2", "test1", Symbol(test1)]