Uncaught (in promise) LinkError: WebAssembly.instantiate(): Import #0 module="env" function="jsClearRect" error: function import requires a callable

[Osman Zakir]

I'm reading the book Learn WebAssembly by Mike Rourke, and in chapter 5 in the book I have to write this code: https://gist.github.com/DragonOsman/54c0266c3cf30bd5bcde3dc27a53764d .  What the chapter is showing in the section the code is from is how to write the Wasm loading code yourself.  (In the book, the loadWasm stuff is in a separate file which is linked into the HTML page in the head element, but with that the browser can't see the function.  So I put it with the rest of the JavaScript code.  And the whole code was in the HTML file itself which I don't like, so I put it in a separate file.)  

As the title says, I have an uncaught promise error in WebAssembly.instantiate. It's thrown because of the _jsClearRect function on line 46.  I don't understand why the error is being thrown or how to fix it, though.  The file without-glue.c shows the C code that was compiled.  

Any help is appreciated.

PS. Is there a way to persistently save the temporary JS file created when Emscripten runs?  The file that's run through Node when compiling C/C++ code.  When I try to compile anything using the Wasm backend on Windows, and I use the -s SIDE_MODULE setting, it generates a .wasm file that doesn't work (without that setting, there's JS glue code but no .wasm file).  And along with that, I get Node returning a nonzero value and an empty output when called with the temporary JS file as input.  

I posted about it here: https://github.com/emscripten-core/emscripten/issues/8557 .  Sam Clegg said it's possible to do this, but that it requires hacking the JS code?  I don't know what changes to make to the code so I can't do anything here.  Would someone please help?  Right now I'm sticking to using WSL when I want to use the Wasm backend on Windows.