instantiateWasm.js

export const wasmBrowserInstantiate = async (wasmModuleUrl, importObject) => {
    let response = undefined;

    if (!importObject) {
        importObject = {
            env: {
                abort: () => console.log("Abort!")
            }
        };
    }

    // Check if the browser supports streaming instantiation
    if (WebAssembly.instantiateStreaming) {
        // Fetch the module, and instantiate it as it is downloading
        response = await WebAssembly.instantiateStreaming(
            fetch(wasmModuleUrl),
            importObject
        );
    } else {
        // Fallback to using fetch to download the entire module
        // And then instantiate the module
        // !! defect: unable to support map file
        const fetchAndInstantiateTask = async () => {
            const wasmArrayBuffer = await fetch(wasmModuleUrl).then(response =>
                response.arrayBuffer()
            );
            return WebAssembly.instantiate(wasmArrayBuffer, importObject);
        };
        response = await fetchAndInstantiateTask();
    }

    return response;
};