I've been trying in a very hacky way to get the sizing of the Emscripten Html export area working for Wasm Panels here in wiki.
The following tests tried various width of stack - 360 / 380 / 390 - these don't seem to make much of a diffference as we do not understand how Livecode Wasm Resizing works?
wasm/Hexagon1
https://david.livecode.wiki/assets/wasm/Hexagon1/Hexagon.html HEIGHT 440 And here is a demo with 360px sizing from teh Hexagon1 folder, but with the html elements removed.
https://david.livecode.wiki/assets/wasm/Hexagon/new_hexagon.html HEIGHT 440 And here is a demo of new_hexagon.html in Hexagon folder with 380px sizing.