Function loader

packages/next/src/shared/lib/dynamic.tsx:125–128

()

  const loaderFn = loadableOptions.loader as () => LoaderComponent<P>
  const loader = () =>
    loaderFn != null
      ? loaderFn().then(convertModule)
      : Promise.resolve(convertModule(() => null))

  // coming from build/babel/plugins/react-loadable-plugin.js
  if (loadableOptions.loadableGenerated) {