Object.defineProperty
, but not IE 8's broken one.
const assert = require('assert'); const $defineProperty = require('es-define-property'); if ($defineProperty) { assert.equal($defineProperty, Object.defineProperty); } else if (Object.defineProperty) { assert.equal($defineProperty, false, 'this is IE 8'); } else { assert.equal($defineProperty, false, 'this is an ES3 engine'); }
Simply clone the repo, npm install
, and run npm test
Please email @ljharb or see https://tidelift.com/security if you have a potential security vulnerability to report.