Init. Map does not function and only working on backend at the moment.

node_modules/sleep/module_init.cc

@@ -0,0 +1,24 @@
+#include "sleep.h"
+
+using v8::FunctionTemplate;
+using v8::String;
+
+NAN_METHOD(MUSleep) {
+  Nan::HandleScope scope;
+
+  if (info.Length() < 1 || !info[0]->IsUint32()) {
+    Nan::ThrowError("Expected number of microseconds");
+    return;
+  }
+
+  node_usleep(Nan::To<uint32_t>(info[0]).FromJust());
+
+  info.GetReturnValue().SetUndefined();
+}
+
+NAN_MODULE_INIT(init) {
+  Nan::Set(target, Nan::New<String>("usleep").ToLocalChecked(),
+    Nan::GetFunction(Nan::New<FunctionTemplate>(MUSleep)).ToLocalChecked());
+}
+
+NODE_MODULE(node_sleep, init)