JsValueRef __stdcall WScriptJsrt::MonotonicNowCallback(JsValueRef callee, bool isConstructCall, JsValueRef *arguments, unsigned short argumentCount, void *callbackState)
{
    HRESULT hr = E_FAIL;
    JsValueRef returnValue = JS_INVALID_REFERENCE;
    JsErrorCode errorCode = JsNoError;

    IfJsrtErrorSetGo(ChakraRTInterface::JsGetUndefinedValue(&returnValue));

    using std::chrono::duration_cast;
    using std::chrono::milliseconds;
    using std::chrono::steady_clock;

    double now = duration_cast<milliseconds>(steady_clock::now().time_since_epoch()).count();

    ChakraRTInterface::JsNumberToDouble(now, &returnValue);

    return returnValue;

Error:
    return returnValue;
}