webpack-chunk.js

output: {
  // The build folder.
  path: paths.appBuild,
  // Generated JS file names (with nested folders).
  // There will be one main bundle, and one file per asynchronous chunk.
  // We don't currently advertise code splitting but Webpack supports it.
  filename: 'static/js/[name].[chunkhash:8].js',
  chunkFilename: 'static/js/[name].[chunkhash:8].chunk.js',
  // We inferred the "public path" (such as / or /my-project) from homepage.
  publicPath: publicPath,
  // Point sourcemap entries to original disk location (format as URL on Windows)
  devtoolModuleFilenameTemplate: info =>
    path
      .relative(paths.appSrc, info.absoluteResourcePath)
      .replace(/\\/g, '/'),
},