@babel/runtime-corejs3

Polyfilling ECMAScript features

This code imports polyfills for stable ECMAScript features and the regenerator runtime needed to use generators and async functions.

import 'core-js/stable';
import 'regenerator-runtime/runtime';

Usage of built-in methods

This code demonstrates how to use the map method from core-js through the runtime without polluting the global Array prototype.

import { map } from '@babel/runtime-corejs3/core-js-stable/instance/map';

let arr = [1, 2, 3];
let mapped = map.call(arr, x => x * x);

Usage of new syntax features

This code shows how to use the helpers provided by @babel/runtime-corejs3 to work with new syntax features like async functions and generators.

import _asyncToGenerator from '@babel/runtime-corejs3/helpers/asyncToGenerator';
import _regeneratorRuntime from '@babel/runtime-corejs3/regenerator';

const asyncFunc = _asyncToGenerator(function* () {
  yield Promise.resolve('Hello World');
});