es-shimsobject.hasown 
An ES spec-compliant Object.hasOwn shim. Invoke its "shim" method to shim Object.hasOwn if it is unavailable or noncompliant.
This package implements the es-shim API interface. It works in an ES3-supported environment and complies with the spec.
Most common usage:
var assert = require('assert');
var hasOwn = require('object.hasown');
var obj = { a: 1, b: 2 };
assert(hasOwn(obj, 'a'));
assert(hasOwn(obj, 'b'));
assert('toString' in obj && !hasOwn(obj, 'toString'));
if (!Object.hasOwn) {
hasOwn.shim();
}
assert.deepEqual(Object.hasOwn(obj, 'a'), hasOwn(obj, 'a'));
Tests
Simply clone the repo, npm install, and run npm test