Loading FLT files via Javascript

Interesting, thanks.
I don’t know that one. Do you have a reference and/or example?

Update:
It seems it’s not working atm: Loading a saved flight via Simconnect is not working

Do you mean this communication API? Communication API

So you can’t call it directly from js it seems (even if it did work) you have to use the js to wasm, and build a separate Wasm module that does the simconnect_flighload

Is it possible just to make a straight call from js, without having to make a wasm module?