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next.js/examples/with-universal-configuration-runtime/README.md

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2018-09-20 09:32:16 +00:00
[![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-universal-configuration-runtime)
# With universal runtime configuration
## 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-universal-configuration-runtime with-universal-configuration-runtime-app
# or
yarn create next-app --example with-universal-configuration-runtime with-universal-configuration-runtime-app
```
### Download manually
Download the example:
```bash
curl https://codeload.github.com/zeit/next.js/tar.gz/canary | tar -xz --strip=2 next.js-canary/examples/with-universal-configuration-runtime
cd with-universal-configuration-runtime
```
Install it and run:
```bash
npm install
API_URL='https://example.com' npm run dev
# or
yarn
API_URL='https://example.com' 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 show how to set custom environment variables for your application at runtime using the `publicRuntimeConfig` key in `next.config.js`
For documentation see: https://github.com/zeit/next.js#exposing-configuration-to-the-server--client-side