---
id: supported-browsers-features
title: Supported Browsers and Features
sidebar_label: Supported Browsers and Features
---

## Supported Browsers

By default, the generated project supports all modern browsers. Support for Internet Explorer 9, 10, and 11 requires [polyfills](https://github.com/facebook/create-react-app/blob/master/packages/react-app-polyfill/README.md).

## Supported Language Features

This project supports a superset of the latest JavaScript standard. In addition to [ES6](https://github.com/lukehoban/es6features) syntax features, it also supports:

- [Exponentiation Operator](https://github.com/rwaldron/exponentiation-operator) (ES2016).
- [Async/await](https://github.com/tc39/ecmascript-asyncawait) (ES2017).
- [Object Rest/Spread Properties](https://github.com/tc39/proposal-object-rest-spread) (ES2018).
- [Dynamic import()](https://github.com/tc39/proposal-dynamic-import) (stage 3 proposal)
- [Class Fields and Static Properties](https://github.com/tc39/proposal-class-public-fields) (part of stage 3 proposal).
- [JSX](https://facebook.github.io/react/docs/introducing-jsx.html), [Flow](./adding-flow) and [TypeScript](./adding-typescript).

Learn more about [different proposal stages](https://tc39.github.io/process-document/).

While we recommend using experimental proposals with some caution, Facebook heavily uses these features in the product code, so we intend to provide [codemods](https://medium.com/@cpojer/effective-javascript-codemods-5a6686bb46fb) if any of these proposals change in the future.

Note that **this project includes no [polyfills](https://github.com/facebook/create-react-app/blob/master/packages/react-app-polyfill/README.md)** by default.

If you use any other ES6+ features that need **runtime support** (such as `Array.from()` or `Symbol`), make sure you are [including the appropriate polyfills manually](https://github.com/facebook/create-react-app/blob/master/packages/react-app-polyfill/README.md), or that the browsers you are targeting already support them.
