tailwind.config.js

const defaultTheme = require('tailwindcss/defaultTheme');
const svgToDataUri = require('mini-svg-data-uri');
const colors = require('tailwindcss/colors');
const {
  default: flattenColorPalette,
} = require('tailwindcss/lib/util/flattenColorPalette');

/** @type {import('tailwindcss').Config} */
module.exports = {
  content: [
    './src/pages/**/*.{js,ts,jsx,tsx,mdx}',
    './src/components/**/*.{js,ts,jsx,tsx,mdx}',
    './src/app/**/*.{js,ts,jsx,tsx,mdx}',
  ],
  theme: {
    extend: {
      backgroundImage: {
        'gradient-radial': 'radial-gradient(var(--tw-gradient-stops))',
        'gradient-conic':
          'conic-gradient(from 180deg at 50% 50%, var(--tw-gradient-stops))',
      },
      fontFamily: {
        Syne: '"Syne", Helvetica, Arial, sans-serif',
      },
    },
  },
  plugins: [
    addVariablesForColors,
    function ({ matchUtilities, theme }) {
      matchUtilities(
        {
          'bg-grid': (value) => ({
            backgroundImage: `url("${svgToDataUri(
              `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32" width="32" height="32" fill="none" stroke="${value}"><path d="M0 .5H31.5V32"/></svg>`
            )}")`,
          }),
          'bg-grid-small': (value) => ({
            backgroundImage: `url("${svgToDataUri(
              `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32" width="8" height="8" fill="none" stroke="${value}"><path d="M0 .5H31.5V32"/></svg>`
            )}")`,
          }),
          'bg-dot': (value) => ({
            backgroundImage: `url("${svgToDataUri(
              `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32" width="16" height="16" fill="none"><circle fill="${value}" id="pattern-circle" cx="10" cy="10" r="1.6257413380501518"></circle></svg>`
            )}")`,
          }),
        },
        { values: flattenColorPalette(theme('backgroundColor')), type: 'color' }
      );
    },
  ],
};

// This plugin adds each Tailwind color as a global CSS variable, e.g. var(--gray-200).
function addVariablesForColors({ addBase, theme }) {
  let allColors = flattenColorPalette(theme('colors'));
  let newVars = Object.fromEntries(
    Object.entries(allColors).map(([key, val]) => [`--${key}`, val])
  );

  addBase({
    ':root': newVars,
  });
}