css-managed-media

Really custom media in CSS

CSS managed media runtime API.

Install

$ yarn add -D postcss-managed-media
$ yarn add css-managed-media

Usage

postcss.config.js

const managedMedia = require('postcss-managed-media').default;

module.exports = {
    plugins: [managedMedia],
};

styles.less

// Assuming you use both `less-loader` and `postcss-loader`.
// Also assuming you transpile LESS vars to CSS vars.

@managed-media --light;

@bg: #000;
@fg: #fff;

.page {
    background-color: @bg;
    color: @fg;
}

@media (--light) {
    @bg: #fff;
    @fg: #000;
}

media.js

import { setMedia } from 'css-managed-media';
import { store } from './store';

let { theme: current } = store.getState();
const setLight = setMedia('light', current === 'light');

setLight();

store.subscribe(() => {
    const { theme: next } = store.getState();

    if (current !== next) {
        current = next;
        setLight();
    }
});

API

setMedia

Signature: setMedia(media: string, value: boolean = false): void.

Arguments:

• media: string — feature name.
• value?: boolean — true to switch feature on, false or nothing — to switch it off.

Roadmap

• Discrete features (--theme: light, --theme: dark).
• Integration with postcss-custom-media.
  • Discrete custom media:

    @custom-media --size {
        s: (max-width: 599px);
        m: (min-width: 600px) and (max-width: 1199px);
        l: (min-width: 1200px);
    }

• matchMedia support.
• Future-proof setMedia API. (E.g. on CSS global.)
• Parametrized managed media (--min-scrollbar-width: 10px).

License

MIT