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next.js/examples/with-custom-babel-config/README.md

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[![Deploy to now](https://deploy.now.sh/static/button.svg)](https://deploy.now.sh/?repo=https://github.com/zeit/next.js/tree/master/examples/with-custom-babel-config)
# Using a custom Babel config
## How to use
### Using `create-next-app`
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:
```bash
npx create-next-app --example with-custom-babel-config with-custom-babel-config-app
# or
yarn create next-app --example with-custom-babel-config with-custom-babel-config-app
```
### Download manually
2017-01-16 21:23:24 +00:00
Download the example [or clone the repo](https://github.com/zeit/next.js):
```bash
curl https://codeload.github.com/zeit/next.js/tar.gz/canary | tar -xz --strip=2 next.js-canary/examples/with-custom-babel-config
cd with-custom-babel-config
```
Install it and run:
```bash
npm install
npm run dev
# or
yarn
yarn dev
```
Deploy it to the cloud with [now](https://zeit.co/now) ([download](https://zeit.co/download))
```bash
now
```
## The idea behind the example
This example features:
* An app using proposed [do expressions](https://babeljs.io/docs/plugins/transform-do-expressions/).
* It uses babel-preset-stage-0, which allows us to use above JavaScript feature.
* It uses '.babelrc' file in the app directory to add above preset.
> Most of the time, when writing a custom `.babelrc` file, you need to add `next/babel` as a preset.