Add more docs

public/app/core/utils/CorsSharedWorker.ts

@@ -14,10 +14,22 @@ class SharedWorkerNotSupported implements SharedWorker {
   addEventListener(): void {}
   removeEventListener(): void {}
 }
+
+/**
+ * The base class is created dynamically here to allow later on syntax like:
+ * import { CorsSharedWorker as SharedWorker } from '../utils/CorsSharedWorker';
+ * And also take into account cases where SharedWorked is not available in the browser (mainly mobile browsers)
+ *
+ * It's important to use: new SharedWorker(...) syntax instead of new CorsSharedWorker(...) due to how web-workers
+ * are processing workers syntax (more details https://webpack.js.org/guides/web-workers/)
+ */
 const BaseSharedWorkerClass = sharedWorkersSupported() ? window.SharedWorker : SharedWorkerNotSupported;
 
 export class CorsSharedWorker extends BaseSharedWorkerClass {
   constructor(url: URL, options?: WorkerOptions) {
+    if (!sharedWorkersSupported()) {
+      return;
+    }
     // by default, worker inherits HTML document's location and pathname which leads to wrong public path value
     // the CorsWorkerPlugin will override it with the value based on the initial worker chunk, ie.
     //    initial worker chunk: http://host.com/cdn/scripts/worker-123.js