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## Summary Remove redundant `#` from [error pages](https://github.com/vercel/next.js/tree/canary/errors). ## Description Follow up #52038 and #72263. Updated [template.txt](https://github.com/vercel/next.js/blob/canary/errors/template.txt) and clarified the header deps. Then rewrite as per the template. ### Improving Documentation - [x] Run `pnpm prettier-fix` to fix formatting issues before opening the PR. - [x] Read the Docs Contribution Guide to ensure your contribution follows the docs guidelines: https://nextjs.org/docs/community/contribution-guide Co-authored-by: Delba de Oliveira <[email protected]>
30 lines
1.4 KiB
Plaintext
30 lines
1.4 KiB
Plaintext
---
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title: SWC disabled
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---
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## Why This Message Occurred
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Next.js now uses Rust-based compiler [SWC](https://swc.rs/) to compile JavaScript/TypeScript. This new compiler is up to 17x faster than Babel when compiling individual files and up to 5x faster Fast Refresh.
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Next.js provides full backwards compatibility with applications that have [custom Babel configuration](/docs/pages/building-your-application/configuring/babel). All transformations that Next.js handles by default like styled-jsx and tree-shaking of `getStaticProps` / `getStaticPaths` / `getServerSideProps` have been ported to Rust.
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When an application has custom Babel configuration Next.js will automatically opt-out of using SWC for compiling JavaScript/Typescript and will fall back to using Babel in the same way that it was used in Next.js 11.
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Many of the integrations with external libraries that currently require custom Babel transformations will be ported to Rust-based SWC transforms in the near future. These include but are not limited to:
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- Emotion
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In order to prioritize transforms that will help you adopt SWC please provide your `.babelrc` on [the feedback thread](https://github.com/vercel/next.js/discussions/30174).
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## Possible Ways to Fix It
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If you want to use SWC despite the presence of a `.babelrc` file you can force it in your `next.config.js` file.
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```js filename="next.config.js"
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module.exports = {
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experimental: {
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forceSwcTransforms: true,
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},
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}
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```
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