Any pracitcal example how to use async file system API for reading files?

[sasmaster]

I am not sure I understand how to use emscripten_async_wget_data for reading files from the disk.
I open a file dialog via and trying to fetch the URL into emscripten_async_wget_data to read it in my WebAssembly app. It doesn't work. Anyone can point to an example?
Here is the complete problem described in this SO post.

Thanks.

[kripken]

There is a test in the test suite here, that might be useful:

emscripten/test/emscripten_fs_api_browser.c

Lines 53 to 57 in 7d291a7

	emscripten_async_wget_data(
	"http://localhost:8888/screenshot.png",
	(void*)135,
	onLoadedData,
	onErrorData);

[sasmaster]

Yes, I see.Actually I was looking for an example how to load file from local file system after selecting it in a file explorer dialog. Then I found
that URL.createObjectURL works as well.