[](https://deploy.now.sh/?repo=https://github.com/zeit/next.js/tree/master/examples/with-dotenv)
# With Dotenv example
## How to use
Download the example [or clone the repo](https://github.com/zeit/next.js):
```bash
curl https://codeload.github.com/zeit/next.js/tar.gz/master | tar -xz --strip=2 next.js-master/examples/with-dotenv
cd with-dotenv
```
Install it and run:
```bash
npm install
npm run 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 shows the most basic idea of babel replacement from multiple environment. We have 1 env variable: `TEST` which will be replaced in development env and in production env with different babel plugin. In local development, babel reads .env file and replace process.env.* in your nextjs files. In production env (such as heroku), babel reads the ENV and replace process.env.* in your nextjs files. Thus no more needed to commit your secrets anymore.
Of course, please put .env* in your .gitignore when using this example locally.
