One short note on source maps

[dcodeIO]

Just so you are aware: Source map support currently requires that either the source map URL in the .wasm is absolute, or compileStreaming respectively instantiateStreaming are used. [ref]

[happybang]

I can only check the absolute URL for SourceMap is usefull , but the relative URL for sourceMap is not usefull in my firefox(v58.2) ，it's the same as your demo。it seems like unsupported by FF.

[dcodeIO]

Yes, relative source map URLs require the use of compileStreaming respectively instantiateStreaming.

[happybang]

i tried instantiateStreaming again like this:

 WebAssembly.instantiateStreaming(fetch(${publicPath}))
        .then(function(obj){
            return obj.instance.exports;
        });

but the FF still warn like this:

Sourcemap Error：TypeError: test.wasm.map is not a valid URL.
Source URL：wasm:http://192.168.1.106:3022/static/js/index.js:3317cec8b3f5c25c
SourcemapURL：test.wasm.map

is there something i ignore？