Socket
Socket
Sign inDemoInstall

postcss-env-function

Package Overview
Dependencies
5
Maintainers
2
Versions
15
Alerts
File Explorer

Advanced tools

Install Socket

Protect your apps from supply chain attacks

Install

postcss-env-function

Use env() variables in CSS

    6.0.0latest
    GitHub
    npm

Version published
Maintainers
2
Weekly downloads
4,614,833
decreased by-12.5%

Weekly downloads

Readme

Source

PostCSS Environment Variables PostCSS Logo

NPM Version CSS Standard Status Build Status Discord

PostCSS Environment Variables lets you use env() variables in CSS, following the CSS Environment Variables specification.

⚠️ Custom Environment Variables were never defined in a specification and we are no longer including this in postcss-preset-env.
In the future there might be renewed interest in Custom Environment Variables.

We advice users of this plugin to seek alternatives such as postcss-design-tokens

@media (max-width: env(--branding-small)) {
  body {
    padding: env(--branding-padding);
  }
}

/* becomes */

@media (min-width: 600px) {
  body {
    padding: 20px;
  }
}

/* when the `importFrom` option is: {
  "environmentVariables": {
    "--branding-small": "600px",
    "--branding-padding": "20px"
  }
} */

Usage

Add PostCSS Environment Variables to your project:

npm install postcss postcss-env-function --save-dev

Use it as a PostCSS plugin:

const postcss = require('postcss')
const postcssEnvFunction = require('postcss-env-function')

postcss([
  postcssEnvFunction(/* pluginOptions */)
]).process(YOUR_CSS /*, processOptions */)

PostCSS Environment Variables runs in all Node environments, with special instructions for:

NodePostCSS CLIWebpackGulpGrunt

Options

importFrom

The importFrom option specifies sources where Environment Variables can be imported from, which might be JS and JSON files, functions, and directly passed objects.

postcssEnvFunction({
  importFrom: 'path/to/file.js' /* module.exports = {
      environmentVariables: {
        '--branding-padding': '20px',
        '--branding-small': '600px'
      }
    } */
})
@media (max-width: env(--branding-small)) {
  body {
    padding: env(--branding-padding);
  }
}

/* becomes */

@media (min-width: 600px) {
  body {
    padding: 20px;
  }
}

Multiple sources can be passed into this option, and they will be parsed in the order they are received. JavaScript files, JSON files, functions, and objects will need to namespace Custom Properties using the environmentVariables or environment-variables key.

postcssEnvFunction({
  importFrom: [
    /* Import from a CommonJS file:
    
    module.exports = {
      environmentVariables: {
        '--branding-padding': '20px'
      }
    } */
    'path/to/file.js',

    /* Import from a JSON file:

    {
      "environment-variables": {
        "--branding-padding": "20px"
      }
    } */
    'and/then/this.json',

    /* Import from an JavaScript Object: */
    {
      environmentVariables: { '--branding-padding': '20px' }
    },

    /* Import from a JavaScript Function: */
    () => {
      const environmentVariables = { '--branding-padding': '20px' }

      return { environmentVariables }
    }
  ]
})

See example imports written in JS and JSON. Currently only valid custom property names (beginning with --) are accepted. Not all valid declaration value names are accepted.

disableDeprecationNotice

Silence the deprecation notice that is printed to the console when using `importFrom``.

postcss-env-function is deprecated and will be removed. Check the discussion on github for more details. https://github.com/csstools/postcss-plugins/discussions/192

Keywords

FAQs

Last updated on 03 Jul 2023

Did you know?

Socket installs a GitHub app to automatically flag issues on every pull request and report the health of your dependencies. Find out what is inside your node modules and prevent malicious activity before you update the dependencies.

Install

Related posts

SocketSocket SOC 2 Logo

Product

  • Package Alerts
  • Integrations
  • Docs
  • Pricing
  • FAQ
  • Roadmap

Stay in touch

Get open source security insights delivered straight into your inbox.


  • Terms
  • Privacy
  • Security

Made with ⚡️ by Socket Inc