@jlalmes/goober/global/src/index.js

A less than 1KB css-in-js solution

import { css, styled } from 'goober';

/**
 * CSS Global function to declare global styles
 * @type {Function}
 */
export let glob = css.bind({ g: 1 });

/**
 * Creates the global styles component to be used as part of your tree.
 * @returns {Function}
 */
export function createGlobalStyles() {
    const fn = styled.call({ g: 1 }, 'div').apply(null, arguments);

    /**
     * This is the actual component that gets rendered.
     */
    return function GlobalStyles(props) {
        // Call the above styled.
        fn(props);

        // Returns a hole.
        return null;
    };
}