nuxt-envalid

Dead simple Envalid integration for Nuxt 2.

• ✨  Release Notes
• 📖  Documentation

Features

• Define a required schema for your environment variables
• Validates variables in the env property of the nuxt.config.js
• Validates variables in process.env
• Validates variables present in the .env file, if loaded together with @nuxtjs/dotenv
• Fails the build process if a variable is missing
• Loads them cleaned and enriched with default values into your application context (process.env and context.env)

Getting Started

1. Add nuxt-envalid as dev-dependency to your project via yarn or npm:

yarn add --dev nuxt-envalid # or npm install --save-dev nuxt-envalid

2. Add nuxt-envalid to the buildModules section of nuxt.config.js:

// nuxt.config.js
export default {
  buildModules: ['nuxt-envalid'],
};

⚠️ If you are using a Nuxt version previous than v2.9 you have to install the module as a dependency (No --dev or --save-dev flags) and also use modules section in nuxt.config.js instead of buildModules.

Inline config

// nuxt.config.js
export default {
  buildModules: [
    [
      'nuxt-envalid',
      {
        /* module config */
      },
    ],
  ],
};

Top level config

// nuxt.config.js
export default {
  buildModules: ['nuxt-envalid'],
  envalid: {
    /* module config */
  },
};

Config function

If you need to use a function to provide the module config you are good to go:

// nuxt.config.js
export default {
  buildModules: [
    [
      'nuxt-envalid',
      () => ({
        /* module config */
      }),
    ],
  ],
  /* or at top level */
  envalid: () => ({
    /* module config */
  }),
};

⚠️ Defining module options inline will overwrite module options defined at top level.

Configuration

Overview

Param	Description	Required	Default
specs	An object that specifies the format of required vars.	No
options	An (optional) object, which supports the following key:	No
options.reporter	Pass in a function to override the default error handling and console output.	No

specs

For further information take a look at the official documentation of envalid.

// nuxt.config.js
import { bool, str } from 'nuxt-envalid';
export default {
  buildModules: ['nuxt-envalid'],
  envalid: {
    specs: {
      TITLE: str(),
      SUBTITLE: str({ default: 'subtitle' }),
      IS_PUBLIC: bool({ default: false }),
    },
  },
};

options

For further information take a look at the official documentation of envalid.

// nuxt.config.js
export default {
  buildModules: ['nuxt-envalid'],
  envalid: {
    options: {
      reporter: ({ errors, env }) => {
        console.log(errors, env);
      },
    },
  },
};

Usage

Usage with env property in Nuxt config

// nuxt.config.js
import { bool, host } from 'nuxt-envalid';
export default {
  env: {
    BACKEND_HOST: 'backend.example.com',
  },
  buildModules: ['nuxt-envalid'],
  envalid: {
    specs: {
      BACKEND_HOST: host(),
      BACKEND_SECURE: bool({ default: true }),
    },
  },
};

<!-- pages/index.vue -->
<template>
  <div>
    <h1>{ { post.title } }</h1>
    <p>{ { post.description } }</p>
  </div>
</template>

<script>
export default {
  async asyncData({ env }) {
    const response = await fetch(
      `${env.BACKEND_SECURE ? 'https' : 'http'}://${env.BACKEND_HOST}/post/1`
    );
    const post = await response.json();
    return { post };
  },
};
</script>

Using together with @nuxtjs/dotenv

This module will validate the result of @nuxtjs/dotenv.

⚠️ Be sure to include this module AFTER @nuxtjs/dotenv.

# .env
CTF_CDA_ACCESS_TOKEN="super-secret-access-token"

// nuxt.config.js
import { str } from 'nuxt-envalid';
export default {
  env: {
    CTF_SPACE_ID: 'my-space-id',
  },
  buildModules: ['@nuxtjs/dotenv', 'nuxt-envalid'],
  envalid: {
    specs: {
      CTF_SPACE_ID: str(),
      CTF_CDA_ACCESS_TOKEN: str(),
      CTF_ENVIRONMENT: str({ default: 'production' }),
    },
  },
};

// plugins/contentful.js
import { createClient } from 'contentful';

export default createClient({
  space: process.env.CTF_SPACE_ID,
  accessToken: process.env.CTF_CDA_ACCESS_TOKEN,
  environment: process.env.CTF_ENVIRONMENT,
});

Accessing the data

Since this module is only there to validate the presence of environment variables and to load them sanitized into the already existing process.env and context.env, the general access of the data doesn't change. Take a look on the official documentation to get a deeper insight here.

Missing variables

Validation takes places during build time. So if any variable out of the specified configuration is missing in the env property of the Nuxt config or in the .env file, if @nuxtjs/dotenv is used, the build will fail.

License

MIT License