import 'core-js/es/math'; import 'core-js/es/number'; /* eslint no-proto: 0 */ const testObject = {} as any; if (!(Object.setPrototypeOf || testObject.__proto__)) { const nativeGetPrototypeOf = Object.getPrototypeOf; Object.getPrototypeOf = object => { if (object.__proto__) { return object.__proto__; } return nativeGetPrototypeOf.call(Object, object); }; }