31 lines
1.6 KiB
Markdown
31 lines
1.6 KiB
Markdown
# Example app with [babel-macros](https://github.com/kentcdodds/babel-macros)
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This example features how to configure and use [`babel-macros`](https://github.com/kentcdodds/babel-macros) which allows you to easily add babel plugins which export themselves as a macro without needing to configure them.
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## Deploy your own
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Deploy the example using [Vercel](https://vercel.com?utm_source=github&utm_medium=readme&utm_campaign=next-example):
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[](https://vercel.com/new/git/external?repository-url=https://github.com/vercel/next.js/tree/canary/examples/with-babel-macros&project-name=with-babel-macros&repository-name=with-babel-macros)
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## How to use
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Execute [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app) with [npm](https://docs.npmjs.com/cli/init) or [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/) to bootstrap the example:
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```bash
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npx create-next-app --example with-babel-macros with-babel-macros-app
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# or
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yarn create next-app --example with-babel-macros with-babel-macros-app
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```
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Deploy it to the cloud with [Vercel](https://vercel.com/new?utm_source=github&utm_medium=readme&utm_campaign=next-example) ([Documentation](https://nextjs.org/docs/deployment)).
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## Note
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You'll notice the configuration in `.babelrc` includes the `babel-macros`
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plugin, then we can use the `preval.macro` in `pages/index.js` to pre-evaluate
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code at build-time. `preval.macro` is effectively transforming our code, but
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we didn't have to configure it to make that happen!
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Specifically what we're doing is we're prevaling the username of the user who
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ran the build.
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