object.getownpropertydescriptors <sup>{rdoc-image:http://versionbadg.es/ljharb/object.getownpropertydescriptors.svg}[https://npmjs.org/package/object.getownpropertydescriptors]

An ES2017 spec-compliant shim for Object.getOwnPropertyDescriptors that works in ES5. Invoke its “shim” method to shim Object.getOwnPropertyDescriptors if it is unavailable, and if Object.getOwnPropertyDescriptor is available.

This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the spec.

Example

var getDescriptors = require('object.getownpropertydescriptors');
var assert = require('assert');
var obj = { normal: Infinity };
var enumDescriptor = {
        enumerable: false,
        writable: false,
        configurable: true,
        value: true
};
var writableDescriptor = {
        enumerable: true,
        writable: true,
        configurable: true,
        value: 42
};
var symbol = Symbol();
var symDescriptor = {
        enumerable: true,
        writable: true,
        configurable: false,
        value: [symbol]
};

Object.defineProperty(obj, 'enumerable', enumDescriptor);
Object.defineProperty(obj, 'writable', writableDescriptor);
Object.defineProperty(obj, 'symbol', symDescriptor);

var descriptors = getDescriptors(obj);

assert.deepEqual(descriptors, {
        normal: {
                enumerable: true,
                writable: true,
                configurable: true,
                value: Infinity
        },
        enumerable: enumDescriptor,
        writable: writableDescriptor,
        symbol: symDescriptor
});
var getDescriptors = require('object.getownpropertydescriptors');
var assert = require('assert');
/* when Object.getOwnPropertyDescriptors is not present */
delete Object.getOwnPropertyDescriptors;
var shimmedDescriptors = getDescriptors.shim();
assert.equal(shimmedDescriptors, getDescriptors);
assert.deepEqual(shimmedDescriptors(obj), getDescriptors(obj));
var getDescriptors = require('object.getownpropertydescriptors');
var assert = require('assert');
/* when Object.getOwnPropertyDescriptors is present */
var shimmedDescriptors = getDescriptors.shim();
assert.notEqual(shimmedDescriptors, getDescriptors);
assert.deepEqual(shimmedDescriptors(obj), getDescriptors(obj));

Tests

Simply clone the repo, npm install, and run npm test