feat(@ngtools/webpack): Automatically bundle module workers.

Supports new Worker(...,{type:module}) using github.com/googlechromelabs/worker-plugin

Author: developit

Diff for: packages/angular/cli/lib/config/schema.json

@@ -752,6 +752,11 @@
               "description": "Generates a service worker config for production builds.",
               "default": false
             },
+            "autoBundleWorkerModules": {
+              "type": "boolean",
+              "description": "Automatically bundle new Worker('..', { type:'module' })",
+              "default": true
+            },
             "skipAppShell": {
               "type": "boolean",
               "description": "Flag to prevent building an app shell.",

Diff for: packages/angular_devkit/build_angular/package.json

@@ -27,8 +27,8 @@
     "loader-utils": "1.1.0",
     "mini-css-extract-plugin": "0.4.3",
     "minimatch": "3.0.4",
-    "parse5": "4.0.0",
     "opn": "5.3.0",
+    "parse5": "4.0.0",
     "portfinder": "1.0.17",
     "postcss": "6.0.23",
     "postcss-import": "11.1.0",
@@ -37,21 +37,22 @@
     "rxjs": "6.3.3",
     "sass-loader": "7.1.0",
     "semver": "5.5.1",
-    "source-map-support": "0.5.9",
     "source-map-loader": "0.2.4",
+    "source-map-support": "0.5.9",
     "speed-measure-webpack-plugin": "^1.2.3",
     "stats-webpack-plugin": "0.7.0",
     "style-loader": "0.23.0",
     "stylus": "0.54.5",
     "stylus-loader": "3.0.2",
-    "tree-kill": "1.2.0",
     "terser-webpack-plugin": "1.1.0",
+    "tree-kill": "1.2.0",
     "webpack": "4.19.1",
     "webpack-dev-middleware": "3.3.0",
     "webpack-dev-server": "3.1.8",
     "webpack-merge": "4.1.4",
     "webpack-sources": "1.2.0",
-    "webpack-subresource-integrity": "1.1.0-rc.6"
+    "webpack-subresource-integrity": "1.1.0-rc.6",
+    "worker-plugin": "^1.1.1"
   },
   "optionalDependencies": {
     "node-sass": "4.9.3"
@@ -87,4 +88,4 @@
     "protractor": "~5.4.0",
     "zone.js": "^0.8.19"
   }
-}
+}

Diff for: packages/angular_devkit/build_angular/src/angular-cli-files/models/build-options.ts

@@ -49,6 +49,7 @@ export interface BuildOptions {
   namedChunks?: boolean;
   subresourceIntegrity?: boolean;
   serviceWorker?: boolean;
+  autoBundleWorkerModules?: boolean;
   skipAppShell?: boolean;
   statsJson: boolean;
   forkTypeChecker: boolean;

Diff for: packages/angular_devkit/build_angular/src/angular-cli-files/models/webpack-configs/common.ts

@@ -11,6 +11,7 @@
 import * as path from 'path';
 import { HashedModuleIdsPlugin, debug } from 'webpack';
 import * as CopyWebpackPlugin from 'copy-webpack-plugin';
+import * as WorkerPlugin from 'worker-plugin';
 import { getOutputHashFormat } from './utils';
 import { isDirectory } from '../../utilities/is-directory';
 import { requireProjectModule } from '../../utilities/require-project-module';
@@ -120,6 +121,11 @@ export function getCommonConfig(wco: WebpackConfigOptions) {
     });
   }
 
+  if (buildOptions.autoBundleWorkerModules) {
+    const workerPluginInstance = new WorkerPlugin();
+    extraPlugins.push(workerPluginInstance);
+  }
+
   // process asset entries
   if (buildOptions.assets) {
     const copyWebpackPluginPatterns = buildOptions.assets.map((asset: AssetPatternObject) => {