parse5 NPM package (needed by JSDOM, needed by W3C audiobook PEP Primary Entry Page parser) utilises dynamic require() => WebPack warning (will fail at bundled runtime)

[danielweck]

    WARNING in ./node_modules/parse5/lib/index.js 55:23-49
    Critical dependency: the request of a dependency is an expression
     @ ./node_modules/jsdom/lib/jsdom/browser/domtohtml.js
     @ ./node_modules/jsdom/lib/api.js
     @ ./src/main/w3c/audiobooks/toc.ts
     @ ./src/main/redux/sagas/api/publication/packager/packageLink.ts
     @ ./src/main/redux/sagas/api/publication/import/importFromLink.ts
     @ ./src/main/redux/sagas/api/publication/import/index.ts
     @ ./src/main/redux/sagas/api/publication/index.ts
     @ ./src/main/redux/sagas/api/index.ts
     @ ./src/main/di.ts
     @ ./src/main.ts

./node_modules/parse5/lib/index.js:

// Streaming
// NOTE: streaming API is lazy loadable to enable bundling for platforms
// that are different from Node.js.
// See https://github.com/inikulin/parse5/issues/235.
var streamingAPI = {
    ParserStream: './parser/parser_stream',
    PlainTextConversionStream: './parser/plain_text_conversion_stream',
    SerializerStream: './serializer/serializer_stream',
    SAXParser: './sax'
};

Object.keys(streamingAPI).forEach(function (cls) {
    Object.defineProperty(exports, cls, {
        get: function () {
            try {
                return require(streamingAPI[cls]);
            }

            catch (e) {
                throw new Error(
                    cls + ' is supported only for Node.js.' +
                    'See https://github.com/inikulin/parse5/issues/235 for the details.'
                );
            }
        }
    });
});

[danielweck]

I suggest externalising parse5 (WebPack externals configuration directive)

[danielweck]

Also see canvas:

    WARNING in ./node_modules/jsdom/lib/jsdom/utils.js 186:21-40
    Critical dependency: the request of a dependency is an expression
     @ ./node_modules/jsdom/lib/jsdom/browser/Window.js
     @ ./node_modules/jsdom/lib/api.js
     @ ./src/main/w3c/audiobooks/toc.ts
     @ ./src/main/redux/sagas/api/publication/packager/packageLink.ts
     @ ./src/main/redux/sagas/api/publication/import/importFromLink.ts
     @ ./src/main/redux/sagas/api/publication/import/index.ts
     @ ./src/main/redux/sagas/api/publication/index.ts
     @ ./src/main/redux/sagas/api/index.ts
     @ ./src/main/di.ts
     @ ./src/main.ts

./node_modules/jsdom/lib/jsdom/utils.js:

exports.Canvas = null;
["canvas", "canvas-prebuilt"].some(moduleName => {
  try {
    exports.Canvas = require(moduleName);
    if (typeof exports.Canvas !== "function") {
      // In browserify, the require will succeed but return an empty object
      exports.Canvas = null;
    }
  } catch (e) {
    exports.Canvas = null;
  }
  return exports.Canvas !== null;
});

[danielweck]

Also see ws (Web Socket):

    WARNING in ./node_modules/ws/lib/buffer-util.js
    Module not found: Error: Can't resolve 'bufferutil' in '/Users/danielweck/Downloads/500GB/Code/readium-desktop/node_modules/ws/lib'
     @ ./node_modules/ws/lib/buffer-util.js
     @ ./node_modules/ws/lib/receiver.js
     @ ./node_modules/ws/index.js
     @ ./node_modules/jsdom/lib/jsdom/living/websockets/WebSocket-impl.js
     @ ./node_modules/jsdom/lib/jsdom/browser/Window.js
     @ ./node_modules/jsdom/lib/api.js
     @ ./src/main/w3c/audiobooks/toc.ts
     @ ./src/main/redux/sagas/api/publication/packager/packageLink.ts
     @ ./src/main/redux/sagas/api/publication/import/importFromLink.ts
     @ ./src/main/redux/sagas/api/publication/import/index.ts
     @ ./src/main/redux/sagas/api/publication/index.ts
     @ ./src/main/redux/sagas/api/index.ts
     @ ./src/main/di.ts
     @ ./src/main.ts

    WARNING in ./node_modules/ws/lib/validation.js
    Module not found: Error: Can't resolve 'utf-8-validate' in '/Users/danielweck/Downloads/500GB/Code/readium-desktop/node_modules/ws/lib'
     @ ./node_modules/ws/lib/validation.js
     @ ./node_modules/ws/lib/receiver.js
     @ ./node_modules/ws/index.js
     @ ./node_modules/jsdom/lib/jsdom/living/websockets/WebSocket-impl.js
     @ ./node_modules/jsdom/lib/jsdom/browser/Window.js
     @ ./node_modules/jsdom/lib/api.js
     @ ./src/main/w3c/audiobooks/toc.ts
     @ ./src/main/redux/sagas/api/publication/packager/packageLink.ts
     @ ./src/main/redux/sagas/api/publication/import/importFromLink.ts
     @ ./src/main/redux/sagas/api/publication/import/index.ts
     @ ./src/main/redux/sagas/api/publication/index.ts
     @ ./src/main/redux/sagas/api/index.ts
     @ ./src/main/di.ts
     @ ./src/main.ts

=>

./node_modules/ws/lib/buffer-util.js / bufferutil:

try {
  const bufferUtil = require('bufferutil');
  const bu = bufferUtil.BufferUtil || bufferUtil;

  module.exports = {
    mask (source, mask, output, offset, length) {
      if (length < 48) _mask(source, mask, output, offset, length);
      else bu.mask(source, mask, output, offset, length);
    },
    unmask (buffer, mask) {
      if (buffer.length < 32) _unmask(buffer, mask);
      else bu.unmask(buffer, mask);
    },
    concat
  };
} catch (e) /* istanbul ignore next */ {
  module.exports = { concat, mask: _mask, unmask: _unmask };
}

./node_modules/ws/lib/validation.js / utf-8-validate:

try {
  const isValidUTF8 = require('utf-8-validate');

  exports.isValidUTF8 = typeof isValidUTF8 === 'object'
    ? isValidUTF8.Validation.isValidUTF8 // utf-8-validate@<3.0.0
    : isValidUTF8;
} catch (e) /* istanbul ignore next */ {
  exports.isValidUTF8 = () => true;
}