async Callback function to make web request from dotnet?

[DanielHabenicht]

Hey,

I've only seen examples of non asynchronous function calls from dotnet to javascript. But would love something like this:

    [JSFunction] // assigned in JS as `bootsharp.Global.getName = async () => ...`
    public static partial async Task<string> GetFrontendName ();

Is it feasible?

[elringus]

Here is an example from tests:

bootsharp/src/js/test/cs/Test/Functions.cs

Lines 21 to 22 in a5cc885

	[JSFunction]
	public static partial Task<string> GetStringAsync ();

bootsharp/src/js/test/spec/interop.spec.ts

Lines 148 to 154 in a5cc885

	it("can invoke async method with async js callback", async () => {
	Test.Functions.getStringAsync = async () => {
	await new Promise(res => setTimeout(res, 100));
	return "foo";
	};
	expect(await Test.Functions.echoStringAsync()).toStrictEqual("foo");
	});