gulp.task('css', () => {
  const postcss = require('gulp-postcss');
  const { postcssFontGrabber } = require('postcss-font-grabber');

  return gulp
    .src('src/css/**/*.css')
    .pipe(
      postcss([
        postcssFontGrabber({
          // postcss-font-grabber needs to know the CSS output
          // directory in order to calculate the new font URL.
          cssDest: 'dist/',
          fontDest: 'dist/fonts/',
        }),
      ]),
    )
    .pipe(gulp.dest('dist/'));
});

import postcss from 'rollup-plugin-postcss';

export default {
  input: 'src/main.js',
  output: {
    file: 'dist/bundle.js',
    format: 'cjs',
  },
  plugins: [
    postcss({
      plugins: [
        postcssFontGrabber({
          // postcss-font-grabber needs to know the CSS output
          // directory in order to calculate the new font URL.
          cssDest: 'dist/',
          fontDest: 'dist/fonts/',
        }),
      ],
    }),
  ],
};

import path from 'path';

module.exports = {
  entry: './src/index.js',
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist'),
  },
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: ['style-loader', 'css-loader', 'postcss-loader'],
      },
      {
        test: /\.(woff|woff2|eot|ttf|otf)$/i,
        use: ['file-loader'],
      },
    ],
  },
};

import { postcssFontGrabber } from 'postcss-font-grabber';

module.exports = {
  plugins: [
    postcssFontGrabber({
      cssSrc: 'src/css/',
      // When using with `Webpack` you must set `cssDest` as the same as `cssSrc`,
      // since `Webpack` kept updated CSS files in memory, your source files will
      // be fine.
      // When `PostCSS` is done its job, `Webpack` then use `file-loader` to
      // embedding font file references into the dist file.
      cssDest: 'src/css/',
      fontDest: 'tmp/css/fonts/',
    }),
  ],
};