v8 custom Error & Global Error

v8-custom-global-error.cc

inline void ThrowError(const char* msg)
{
    Isolate* isolate = Isolate::current();
    // create custom error class/function
    auto code =
        "class MyError extends TypeError {"
            "constructor(){"
                "super();"
                "this.name = 'MyError';"
                "this.message = 'This is custom Error Object!"
            "}"
        "}"
        "MyError;";

    auto errorFunc = v8::Script::Compile(isolate->NewString(code))->Run().As<v8::Object>();

    v8::Local<v8::Context> _context = isolate->context();
    v8::Local<v8::Object> glob = _context->Global();

    auto URIError = (glob->Get(isolate->NewString("URIError"))).As<v8::Object>();

    // create custom error instance
    auto message = isolate->NewString("This is error!!!");
    v8::Local<v8::Value> args[] = { message };
    // auto error = URIError->CallAsConstructor(1, args); // URIError
    auto error = errorFunc->CallAsConstructor(1, args); // MyError

    isolate->ThrowException(error);
}