fix(runtime/web_worker): Don't block self.onmessage with TLA (#9619)

This commit rewrites implementation of "JsRuntime::mod_evaluate". 

Event loop is no longer polled automatically and users must manually
drive event loop forward after calling "mod_evaluate".

Co-authored-by: Nayeem Rahman <nayeemrmn99@gmail.com>
Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/cli/tests/workers/worker_with_top_level_await.ts b/cli/tests/workers/worker_with_top_level_await.ts
new file mode 100644
index 000000000..6c5528900
--- /dev/null
+++ b/cli/tests/workers/worker_with_top_level_await.ts
@@ -0,0 +1,15 @@
+function delay(ms: number): Promise<void> {
+  return new Promise<void>((resolve) => {
+    setTimeout(() => {
+      resolve();
+    }, ms);
+  });
+}
+
+onmessage = (e: MessageEvent) => {
+  postMessage("triggered worker handler");
+  close();
+};
+postMessage("ready");
+await delay(1000);
+postMessage("never");