rollup.config.js

import resolve from '@rollup/plugin-node-resolve';
import commonjs from '@rollup/plugin-commonjs';
import terser from '@rollup/plugin-terser';
import alias from '@rollup/plugin-alias';

export default [
  // Browser-friendly UMD build
  {
    input: 'src/index.js',
    output: {
      name: 'ThermalPrinterEncoder',
      file: 'dist/thermal-printer-encoder.umd.js',
      format: 'umd',
    },
    plugins: [
      /* Make sure we force the browser version of canvas */
      alias({
        entries: [
          { find: 'canvas', replacement: 'node_modules/canvas/browser.js' },
        ],
      }),

      resolve(),
      commonjs(),
      terser(),
    ],
  },

  // Browser-friendly ES module build
  {
    input: 'src/index.js',
    output: {
      file: 'dist/thermal-printer-encoder.esm.js',
      format: 'es',
    },
    plugins: [
      /* Make sure we force the browser version of canvas */
      alias({
        entries: [
          { find: 'canvas', replacement: 'node_modules/canvas/browser.js' },
        ],
      }),

      resolve(),
      commonjs(),
      terser(),
    ],
  },

  // CommonJS (for Node) and ES module (for bundlers) build
  {
    input: 'src/index.js',
    external: ['esc-pos-encoder', 'star-prnt-encoder'],
    output: [
      { file: 'dist/thermal-printer-encoder.cjs', format: 'cjs' },
      { file: 'dist/thermal-printer-encoder.mjs', format: 'es' },
    ],
  },
];