The Reflect.ownKeys method for legacy.

It returns Reflect.ownKeys, eventually including symbols too, if the browser is compatible.

import ownKeys from '@ungap/own-keys';

ownKeys({a, 1}); // ['a']

• CDN via https://unpkg.com/@ungap/own-keys
• ESM via import ownKeys from '@ungap/own-keys'
• CJS via const ownKeys = require('@ungap/own-keys')

Compatible with every engine.