@shopify/polaris/esnext/utilities/theme/hooks.js

Shopify’s product component library

import { useContext } from 'react';
import { MissingAppProviderError } from '../errors';
import { ThemeContext } from './context';
export function useTheme() {
    const theme = useContext(ThemeContext);
    if (!theme) {
        throw new MissingAppProviderError('No Theme was provided.');
    }
    return theme;
}