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50 lines
1.9 KiB
Markdown
50 lines
1.9 KiB
Markdown
[](https://deploy.now.sh/?repo=https://github.com/zeit/next.js/tree/master/examples/with-universal-configuration)
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# With universal configuration
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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-universal-configuration with-universal-configuration-app
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# or
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yarn create next-app --example with-universal-configuration with-universal-configuration-app
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```
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### Download manually
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Download the example:
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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-universal-configuration
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cd with-universal-configuration
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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 show how to set custom environment variables for your application based on NODE_ENV using [transform-define](https://github.com/FormidableLabs/babel-plugin-transform-define).
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## Caveats
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- Because a babel plugin is used the output is cached in `node_modules/.cache` by `babel-loader`. When modifying the configuration you will have to manually clear this cache to make changes visible. Alternately, you may skip caching for `babel-loader` as shown [here](https://github.com/zeit/next.js/issues/1103#issuecomment-279529809).
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- This example sets the environment configuration at build time, meaning the same build might not be used in e.g. both staging and production. For a solution which sets the environment at runtime, see [here](https://github.com/zeit/next.js/issues/1488#issuecomment-289108931).
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