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denoland-deno/cli/tests/worker_with_top_level_await.ts
Bartek Iwańczuk e924bbdf36
fix: TLA in web worker (#8809)
Implementors of `deno_core::JsRuntime` might want to do additional actions
during each turn of event loop, eg. `deno_runtime::Worker` polls inspector,
`deno_runtime::WebWorker` receives/dispatches messages from/to worker host.
Previously `JsRuntime::mod_evaluate` was implemented in such fashion that it 
only polled `JsRuntime`'s event loop. This behavior turned out to be wrong 
in the example of `WebWorker` which couldn't receive/dispatch messages because
its implementation of event loop was never called. 

This commit rewrites "mod_evaluate" to return a handle to receiver that resolves
when module's promise resolves. It is now implementors responsibility to poll
event loop after calling `mod_evaluate`.
2020-12-20 00:34:22 +01:00

15 lines
337 B
TypeScript

// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { serve } from "../../std/http/server.ts";
const server = serve({ port: 8080 });
self.onmessage = (e: MessageEvent) => {
console.log("TLA worker received message", e.data);
};
self.postMessage("hello");
for await (const _r of server) {
// pass
}