@babel/runtime-corejs3
Advanced tools
babel's modular runtime helpers with core-js@3 polyfilling
The @babel/runtime-corejs3 package is a runtime library for Babel that includes polyfills for ECMAScript features using core-js version 3. It is used alongside Babel to enable the use of new JavaScript features in environments that do not natively support them. This package helps to avoid polluting the global scope and reduces the size of the compiled code by deduplicating helper functions.
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');
});core-js is a modular standard library for JavaScript, including polyfills for ECMAScript up to 2021. It's similar to @babel/runtime-corejs3 but does not require Babel to work and can be included directly in any JavaScript project.
regenerator-runtime is a standalone runtime for Regenerator-compiled generator and async functions. It is similar to the regenerator part of @babel/runtime-corejs3 but does not include other polyfills or helpers.
Deprecated in favor of separate core-js and regenerator-runtime packages, @babel/polyfill was a package that included Babel's polyfills for ECMAScript features. It was similar to @babel/runtime-corejs3 but was designed to be included globally rather than modularly.
babel's modular runtime helpers with core-js@3 polyfilling
See our website @babel/runtime-corejs3 for more information.
Using npm:
npm install --save @babel/runtime-corejs3
or using yarn:
yarn add @babel/runtime-corejs3
v7.27.1 (2025-04-30)
babel-parser
babel-parser, babel-types
babel-plugin-proposal-destructuring-private, babel-plugin-proposal-do-expressions, babel-traverse
babel-helper-wrap-function, babel-plugin-transform-async-to-generator
babel-helper-remap-async-to-generator, babel-plugin-transform-async-to-generator
babel-helper-fixtures, babel-parser
babel-generator, babel-parser
babel-parser
babel-compat-data, babel-preset-env
babel-traverse
babel-generator
babel-plugin-bugfix-v8-spread-parameters-in-optional-chaining, babel-plugin-proposal-decorators, babel-plugin-transform-arrow-functions, babel-plugin-transform-class-properties, babel-plugin-transform-destructuring, babel-plugin-transform-object-rest-spread, babel-plugin-transform-optional-chaining, babel-plugin-transform-parameters, babel-traverse
babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime
regenerator-runtime dep in @babel/runtime (@nicolo-ribaudo)babel-compat-data, babel-preset-env
babel-compat-data, babel-standalone
babel-register
@babel/register to cts (@liuxingbaoyu)babel-cli, babel-compat-data, babel-core, babel-generator, babel-helper-compilation-targets, babel-helper-fixtures, babel-helper-module-imports, babel-helper-module-transforms, babel-helper-plugin-test-runner, babel-helper-transform-fixture-test-runner, babel-helpers, babel-node, babel-parser, babel-plugin-transform-modules-amd, babel-plugin-transform-modules-commonjs, babel-plugin-transform-modules-systemjs, babel-plugin-transform-modules-umd, babel-plugin-transform-react-display-name, babel-plugin-transform-regenerator, babel-plugin-transform-runtime, babel-plugin-transform-typeof-symbol, babel-plugin-transform-typescript, babel-preset-env, babel-register, babel-standalone, babel-types
babel-plugin-transform-regenerator
babel-helpers, babel-plugin-transform-async-generator-functions, babel-plugin-transform-regenerator, babel-preset-env, babel-runtime-corejs3
babel-helpers, babel-plugin-transform-regenerator
babel-helpers
babel-helpers, babel-plugin-transform-modules-commonjs, babel-runtime-corejs3
interopRequireWildcard size (@liuxingbaoyu)babel-helpers, babel-plugin-transform-async-generator-functions, babel-plugin-transform-regenerator, babel-preset-env, babel-runtime-corejs3
regeneratorRuntime size (@liuxingbaoyu)FAQs
babel's modular runtime helpers with core-js@3 polyfilling
The npm package @babel/runtime-corejs3 receives a total of 0 weekly downloads. As such, @babel/runtime-corejs3 popularity was classified as not popular.
We found that @babel/runtime-corejs3 demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 4 open source maintainers collaborating on the project.
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