Help with async fetch call about quickjs-emscripten

[jtewright]

Update: I have got this working by (1) defining deferred outside the fetch function definition so that I can await deferred.settled later on, and (2) properly resolving the promise inside the fetch function with vm values:

async function TestCode(code) {

    const QuickJS = await getQuickJS();
    const vm = QuickJS.createVm();
    let deferred = undefined;

    const fetchHandle = vm.newFunction('fetch', (urlHandle) => {
        const url = vm.getString(urlHandle);
        deferred = vm.newPromise();
        fetch(url).then(result => result.text()).then(text => vm.newString(text).consume(val => deferred.resolve(val));
        return deferred.handle;
    });
    vm.setProp(vm.global, 'fetch', fetchHandle);
    fetchHandle.dispose();
    
    const evalResult = vm.unwrapResult(vm.evalCode(code));
    if (deferred) {
        await deferred.settled;
    }
    vm.executePendingJobs()

    const error = evalResult.error;
    const value = evalResult.value;
    const results = {
        result: error ? "failed" : "success",
        error: error ? vm.dump(error) : null,
        value: error ? null : vm.dump(value)
    };

    if (error) { error.dispose() } else { value.dispose() };
    vm.dispose();

    return results;
}