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Automatic static (build-time) or runtime environment variables injection for [Next.js](https://github.com/zeit/next.js).
Automatic static (build-time) or runtime environment variables injection for Next.js.
The plugin doesn't handle loading of dotenv files. Use dotenv or dotenv-load.
npm install --save next-env dotenv-load
or
yarn add next-env dotenv-load
Your project can consume variables declared in your environment as if they were declared locally in your JS files.
By default any environment variables starting with NEXT_STATIC_
will be embedded in the js bundles on build time.
Variables starting with NEXT_PUBLIC_
are injected on runtime (using Next.js publicRuntimeConfig internally).
On node-side (SSR) all environment variables are available by default, but it is a good idea to follow the naming convention NEXT_SERVER_
.
This module exposes a function that allows to configure the plugin.
In your next.config.js
:
const nextEnv = require('next-env');
const dotenvLoad = require('dotenv-load');
dotenvLoad();
const withNextEnv = nextEnv();
module.exports = withNextEnv({
// Your Next.js config.
});
In your .env
:
NEXT_SERVER_TEST_1=ONLY_ON_SSR
NEXT_PUBLIC_TEST_1=INJECTED_BY_SSR
NEXT_STATIC_TEST_1=STATIC_TEXT
In your pages/index.js
:
export default () => (
<ul>
<li>{process.env.NEXT_SERVER_TEST_1}</li>
<li>{process.env.NEXT_PUBLIC_TEST_1}</li>
<li>{process.env.NEXT_STATIC_TEST_1}</li>
</ul>
)
In the above example the output of process.env.NEXT_SERVER_TEST_1
should only be visible until client-side rendering kicks in.
In your next.config.js
:
const nextEnv = require('next-env');
const dotenvLoad = require('dotenv-load');
dotenvLoad();
const withNextEnv = nextEnv({
staticPrefix: 'CUSTOM_STATIC_',
publicPrefix: 'CUSTOM_PUBLIC_',
});
module.exports = withNextEnv({
// Your Next.js config.
});
In your .env
:
CUSTOM_SERVER_TEST_1=ONLY_ON_SSR
CUSTOM_PUBLIC_TEST_1=INJECTED_BY_SSR
CUSTOM_STATIC_TEST_1=STATIC_TEXT
In your next.config.js
:
const withPlugins = require('next-compose-plugins');
const nextEnv = require('next-env');
const dotenvLoad = require('dotenv-load');
dotenvLoad();
const nextConfig = {
// Your Next.js config.
};
module.exports = withPlugins([
nextEnv({
staticPrefix: 'CUSTOM_STATIC_',
publicPrefix: 'CUSTOM_PUBLIC_',
}),
// another plugin with a configuration
[typescript, {
typescriptLoaderOptions: {
transpileOnly: false,
},
}],
], nextConfig);
FAQs
Automatic static (build-time) or runtime environment variables injection for [Next.js](https://github.com/zeit/next.js).
The npm package next-env receives a total of 4,841 weekly downloads. As such, next-env popularity was classified as popular.
We found that next-env demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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