css-vars-ponyfill

Client-side support for CSS custom properties (aka "CSS variables") in legacy and modern browsers

v2.4.9 URL: https://unpkg.com/css-vars-ponyfill@2.4.9/dist/css-vars-ponyfill.min.js

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postcss-export-custom-variables

Export custom media queries, custom properties, custom property sets, and custom selectors from CSS as JavaScript variables

v1.0.0 URL: https://unpkg.com/postcss-export-custom-variables@1.0.0/index.js

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postcss css postcss-plugin export custom custom variables vars variables media properties

vite-plugin-env

Add custom env variables into your vite bundle

v1.0.1 URL: https://unpkg.com/vite-plugin-env@1.0.1/dist/vite-plugin-env.es2019.cjs

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vite plugin custom env envs variable

postcss-custom-properties

Use Custom Properties Queries in CSS

v14.0.6 URL: https://unpkg.com/postcss-custom-properties@14.0.6/dist/index.cjs

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css csswg custom declarations postcss postcss-plugin properties specification variables vars w3c

@csstools/postcss-progressive-custom-properties

Correctly declare progressive enhancements for CSS Custom Properties.

v4.1.0 URL: https://unpkg.com/@csstools/postcss-progressive-custom-properties@4.1.0/dist/index.cjs

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css custom declarations postcss postcss-plugin progressive properties utility variables vars