fix(cli/rt/main): Add global interface objects (#7875)

6 files changed, 95 insertions, 16 deletions

diff --git a/cli/dts/lib.deno.window.d.ts b/cli/dts/lib.deno.window.d.ts
index 5c113cd0d..03341636f 100644
--- a/cli/dts/lib.deno.window.d.ts
+++ b/cli/dts/lib.deno.window.d.ts
@@ -7,7 +7,8 @@
 /// <reference lib="deno.shared_globals" />
 /// <reference lib="esnext" />
 
-declare interface Window extends EventTarget {
+declare class Window extends EventTarget {
+  new(): Window;
   readonly window: Window & typeof globalThis;
   readonly self: Window & typeof globalThis;
   onload: ((this: Window, ev: Event) => any) | null;
diff --git a/cli/dts/lib.deno.worker.d.ts b/cli/dts/lib.deno.worker.d.ts
index 3fc95a97e..a10b1a276 100644
--- a/cli/dts/lib.deno.worker.d.ts
+++ b/cli/dts/lib.deno.worker.d.ts
@@ -7,48 +7,53 @@
 /// <reference lib="deno.shared_globals" />
 /// <reference lib="esnext" />
 
-declare interface DedicatedWorkerGlobalScope {
-  self: DedicatedWorkerGlobalScope & typeof globalThis;
+declare class WorkerGlobalScope {
+  new(): WorkerGlobalScope;
+  self: WorkerGlobalScope & typeof globalThis;
   onmessage:
     | ((
-      this: DedicatedWorkerGlobalScope & typeof globalThis,
+      this: WorkerGlobalScope & typeof globalThis,
       ev: MessageEvent,
     ) => any)
     | null;
   onmessageerror:
     | ((
-      this: DedicatedWorkerGlobalScope & typeof globalThis,
+      this: WorkerGlobalScope & typeof globalThis,
       ev: MessageEvent,
     ) => any)
     | null;
   onerror:
     | ((
-      this: DedicatedWorkerGlobalScope & typeof globalThis,
+      this: WorkerGlobalScope & typeof globalThis,
       ev: ErrorEvent,
     ) => any)
     | null;
-  name: string;
   close: () => void;
   postMessage: (message: any) => void;
   Deno: typeof Deno;
 }
 
-declare var self: DedicatedWorkerGlobalScope & typeof globalThis;
+declare class DedicatedWorkerGlobalScope extends WorkerGlobalScope {
+  new(): DedicatedWorkerGlobalScope;
+  name: string;
+}
+
+declare var self: WorkerGlobalScope & typeof globalThis;
 declare var onmessage:
   | ((
-    this: DedicatedWorkerGlobalScope & typeof globalThis,
+    this: WorkerGlobalScope & typeof globalThis,
     ev: MessageEvent,
   ) => any)
   | null;
 declare var onmessageerror:
   | ((
-    this: DedicatedWorkerGlobalScope & typeof globalThis,
+    this: WorkerGlobalScope & typeof globalThis,
     ev: MessageEvent,
   ) => any)
   | null;
 declare var onerror:
   | ((
-    this: DedicatedWorkerGlobalScope & typeof globalThis,
+    this: WorkerGlobalScope & typeof globalThis,
     ev: ErrorEvent,
   ) => any)
   | null;
diff --git a/cli/rt/99_main.js b/cli/rt/99_main.js
index d8462ce66..d8c34bcb3 100644
--- a/cli/rt/99_main.js
+++ b/cli/rt/99_main.js
@@ -7,6 +7,7 @@ delete Object.prototype.__proto__;
 ((window) => {
   const core = Deno.core;
   const util = window.__bootstrap.util;
+  const { illegalConstructorKey } = window.__bootstrap.webUtil;
   const eventTarget = window.__bootstrap.eventTarget;
   const dispatchMinimal = window.__bootstrap.dispatchMinimal;
   const build = window.__bootstrap.build;
@@ -190,6 +191,42 @@ delete Object.prototype.__proto__;
     core.registerErrorClass("URIError", URIError);
   }
 
+  class Window extends EventTarget {
+    constructor(key) {
+      if (key !== illegalConstructorKey) {
+        throw new TypeError("Illegal constructor.");
+      }
+    }
+
+    get [Symbol.toStringTag]() {
+      return "Window";
+    }
+  }
+
+  class WorkerGlobalScope extends EventTarget {
+    constructor(key) {
+      if (key != illegalConstructorKey) {
+        throw new TypeError("Illegal constructor.");
+      }
+    }
+
+    get [Symbol.toStringTag]() {
+      return "WorkerGlobalScope";
+    }
+  }
+
+  class DedicatedWorkerGlobalScope extends WorkerGlobalScope {
+    constructor(key) {
+      if (key != illegalConstructorKey) {
+        throw new TypeError("Illegal constructor.");
+      }
+    }
+
+    get [Symbol.toStringTag]() {
+      return "DedicatedWorkerGlobalScope";
+    }
+  }
+
   // https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope
   const windowOrWorkerGlobalScope = {
     Blob: util.nonEnumerable(fetch.Blob),
@@ -226,24 +263,20 @@ delete Object.prototype.__proto__;
     WebSocket: util.nonEnumerable(webSocket.WebSocket),
     Worker: util.nonEnumerable(worker.Worker),
     WritableStream: util.nonEnumerable(streams.WritableStream),
-    addEventListener: util.readOnly(EventTarget.prototype.addEventListener),
     atob: util.writable(atob),
     btoa: util.writable(btoa),
     clearInterval: util.writable(timers.clearInterval),
     clearTimeout: util.writable(timers.clearTimeout),
     console: util.writable(new Console(core.print)),
     crypto: util.readOnly(crypto),
-    dispatchEvent: util.readOnly(EventTarget.prototype.dispatchEvent),
     fetch: util.writable(fetch.fetch),
     performance: util.writable(performance.performance),
-    removeEventListener: util.readOnly(
-      EventTarget.prototype.removeEventListener,
-    ),
     setInterval: util.writable(timers.setInterval),
     setTimeout: util.writable(timers.setTimeout),
   };
 
   const mainRuntimeGlobalProperties = {
+    Window: util.nonEnumerable(Window),
     window: util.readOnly(globalThis),
     self: util.readOnly(globalThis),
     // TODO(bartlomieju): from MDN docs (https://developer.mozilla.org/en-US/docs/Web/API/WorkerGlobalScope)
@@ -255,6 +288,8 @@ delete Object.prototype.__proto__;
   };
 
   const workerRuntimeGlobalProperties = {
+    WorkerGlobalScope: util.nonEnumerable(WorkerGlobalScope),
+    DedicatedWorkerGlobalScope: util.nonEnumerable(DedicatedWorkerGlobalScope),
     self: util.readOnly(globalThis),
     onmessage: util.writable(onmessage),
     onerror: util.writable(onerror),
@@ -277,6 +312,7 @@ delete Object.prototype.__proto__;
     hasBootstrapped = true;
     Object.defineProperties(globalThis, windowOrWorkerGlobalScope);
     Object.defineProperties(globalThis, mainRuntimeGlobalProperties);
+    Object.setPrototypeOf(globalThis, Window.prototype);
     eventTarget.setEventTargetData(globalThis);
     // Registers the handler for window.onload function.
     globalThis.addEventListener("load", (e) => {
@@ -341,6 +377,7 @@ delete Object.prototype.__proto__;
     Object.defineProperties(globalThis, windowOrWorkerGlobalScope);
     Object.defineProperties(globalThis, workerRuntimeGlobalProperties);
     Object.defineProperties(globalThis, { name: util.readOnly(name) });
+    Object.setPrototypeOf(globalThis, DedicatedWorkerGlobalScope.prototype);
     eventTarget.setEventTargetData(globalThis);
     const { unstableFlag, pid, noColor, args } = runtimeStart(
       internalName ?? name,
diff --git a/cli/tests/subdir/worker_globals.ts b/cli/tests/subdir/worker_globals.ts
new file mode 100644
index 000000000..a9e7efd85
--- /dev/null
+++ b/cli/tests/subdir/worker_globals.ts
@@ -0,0 +1,10 @@
+onmessage = function (): void {
+  postMessage(
+    [
+      self instanceof DedicatedWorkerGlobalScope,
+      self instanceof WorkerGlobalScope,
+      self instanceof EventTarget,
+    ].join(", "),
+  );
+  close();
+};
diff --git a/cli/tests/unit/globals_test.ts b/cli/tests/unit/globals_test.ts
index 6c83b1b44..53fafc5b6 100644
--- a/cli/tests/unit/globals_test.ts
+++ b/cli/tests/unit/globals_test.ts
@@ -36,6 +36,14 @@ unitTest(function globalThisEqualsSelf(): void {
   assert(globalThis === self);
 });
 
+unitTest(function globalThisInstanceofWindow(): void {
+  assert(globalThis instanceof Window);
+});
+
+unitTest(function globalThisInstanceofEventTarget(): void {
+  assert(globalThis instanceof EventTarget);
+});
+
 unitTest(function DenoNamespaceExists(): void {
   assert(Deno != null);
 });
diff --git a/cli/tests/workers_test.ts b/cli/tests/workers_test.ts
index 395b1da24..06349efa0 100644
--- a/cli/tests/workers_test.ts
+++ b/cli/tests/workers_test.ts
@@ -106,6 +106,24 @@ Deno.test({
 });
 
 Deno.test({
+  name: "worker globals",
+  fn: async function (): Promise<void> {
+    const promise = createResolvable();
+    const w = new Worker(
+      new URL("subdir/worker_globals.ts", import.meta.url).href,
+      { type: "module" },
+    );
+    w.onmessage = (e): void => {
+      assertEquals(e.data, "true, true, true");
+      promise.resolve();
+    };
+    w.postMessage("Hello, world!");
+    await promise;
+    w.terminate();
+  },
+});
+
+Deno.test({
   name: "worker fetch API",
   fn: async function (): Promise<void> {
     const promise = createResolvable();