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* Examples: clarify language around Yarn create & npx * add missing READMEs and create-next-app usage * suggest people tag jthegedus in firebase related issues * add yarn alt instructions * cerebraljs example readme & fixes
55 lines
1.7 KiB
Markdown
55 lines
1.7 KiB
Markdown
[](https://deploy.now.sh/?repo=https://github.com/zeit/next.js/tree/master/examples/with-babel-macros)
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# Example app with [babel-macros](https://github.com/kentcdodds/babel-macros)
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## How to use
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### Using `create-next-app`
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Execute [`create-next-app`](https://github.com/segmentio/create-next-app) with [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/) or [npx](https://github.com/zkat/npx#readme) 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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### Download manually
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Download the example [or clone the repo](https://github.com/zeit/next.js):
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```bash
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curl https://codeload.github.com/zeit/next.js/tar.gz/canary | tar -xz --strip=2 next.js-canary/examples/with-babel-macros
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cd with-babel-macros
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```
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Install it and run:
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```bash
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npm install
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npm run dev
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# or
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yarn
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yarn dev
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```
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Deploy it to the cloud with [now](https://zeit.co/now) ([download](https://zeit.co/download))
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```bash
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now
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```
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## The idea behind the example
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This example features how to configure and use [`babel-macros`](https://github.com/kentcdodds/babel-macros) which allows you
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to easily add babel plugins which export themselves as a macro without needing
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to configure them.
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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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