Some play with types

packages/core/appShell/Worker/index.ts

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+// comlink inspired
+
+type PromisifyProp<T> = T extends Promise<unknown> ? T : Promise<T>;
+type PromisifyFunc<T> = T extends (...args: infer TArguments) => infer TReturn ? (...args: TArguments) => PromisifyProp<TReturn> : unknown
+
+type Promisify<T> = T extends Function ? PromisifyFunc<T> : Promise<T>;
+
+type ProxiedObject<T> = { [P in keyof T]: Promisify<T[P]> };
+
+interface Demo {
+  hello: string;
+  demo(hello: string): boolean;
+  hope(hello: string): Promise<string>;
+}
+
+type Test = ProxiedObject<Demo>;

readme.md

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+https://developer.mozilla.org/en-US/docs/Web/API/Channel_Messaging_API/Using_channel_messaging