description: Browser support and which JavaScript features are supported by Next.js.
---
# Supported Browsers and Features
Next.js supports **IE11 and all modern browsers** (Edge, Firefox, Chrome, Safari, Opera, et al) with no required configuration.
## Polyfills
We transparently inject polyfills required for IE11 compatibility. In addition, we also inject widely used polyfills, including:
- [**fetch()**](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) — Replacing: `whatwg-fetch` and `unfetch`.
- [**URL**](https://developer.mozilla.org/en-US/docs/Web/API/URL) — Replacing: the [`url` package (Node.js API)](https://nodejs.org/api/url.html).
- [**Object.assign()**](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign) — Replacing: `object-assign`, `object.assign`, and `core-js/object/assign`.
If any of your dependencies includes these polyfills, they’ll be eliminated automatically from the production build to avoid duplication.
In addition, to reduce bundle size, Next.js will only load these polyfills for browsers that require them. The majority of the web traffic globally will not download these polyfills.
In addition to `fetch()` on the client side, Next.js polyfills `fetch()` in the Node.js environment. You can use `fetch()` on your server code (such as `getStaticProps`) without using polyfills such as `isomorphic-unfetch` or `node-fetch`.
In this case, you should add a top-level import for the **specific polyfill** you need in your [Custom `<App>`](/docs/advanced-features/custom-app.md) or the individual component.
Next.js allows you to use the latest JavaScript features out of the box. In addition to [ES6 features](https://github.com/lukehoban/es6features), Next.js also supports:
