PostCSS plugin to only export CSS variable declarations.

Input:

:root {
  --bs-primary: blue;
}

body {
  --body-bg: white;
  background: var(--body-bg);
  color: black;
}

a {
  color: var(--bs-primary);
}

Output:

:root {
  --bs-primary: blue;
}

body {
  --body-bg: white;
}

Step 1: Install plugin:

npm install --save-dev postcss postcss-only-vars

Step 2: Check you project for existed PostCSS config: postcss.config.js in the project root, "postcss" section in package.json or postcss in bundle config.

If you do not use PostCSS, add it according to official docs and set this plugin in settings.

Step 3: Add the plugin to plugins list:

module.exports = {
  plugins: [
+   require('postcss-only-vars'),
    require('autoprefixer')
  ]
}