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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
51 lines
1.5 KiB
Markdown
51 lines
1.5 KiB
Markdown
[](https://deploy.now.sh/?repo=https://github.com/zeit/next.js/tree/master/examples/with-custom-babel-config)
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# Using a custom Babel config
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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-custom-babel-config with-custom-babel-config-app
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# or
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yarn create next-app --example with-custom-babel-config with-custom-babel-config-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-custom-babel-config
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cd with-custom-babel-config
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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:
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* An app using proposed [do expressions](https://babeljs.io/docs/plugins/transform-do-expressions/).
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* It uses babel-preset-stage-0, which allows us to use above JavaScript feature.
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* It uses '.babelrc' file in the app directory to add above preset.
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> Most of the time, when writing a custom `.babelrc` file, you need to add `next/babel` as a preset.
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