TypeError: Failed to execute ‘compile’ on ‘WebAssembly’: Incorrect response MIME type. Expected ‘application/wasm’

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One possible workaround is to use instantiate() instead of instantiateStreaming(), since the former doesn’t care about MIME types (while the latter does). To use instantiate():

async function fetchAndInstantiate() {
    const response = await fetch("http://localhost:3000/simple.wasm");
    const buffer = await response.arrayBuffer();
    const obj = await WebAssembly.instantiate(buffer);
    console.log(obj.instance.exports.add(1, 2));  // "3"
}

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