Hello world example using a native extension implemented with NAPI

binding.gyp

{
  "targets": [
    { 
      "cflags!": [ "-fno-exceptions" ],
      "cflags_cc!": [ "-fno-exceptions" ],
      "include_dirs" : [
        "<!@(node -p \"require('node-addon-api').include\")"
      ],
      "target_name": "hello_world",
      "sources": [ "hello_world.cc" ],
      'defines': [ 'NAPI_DISABLE_CPP_EXCEPTIONS' ]
    }
  ]
}

hello_world.cc

#include <napi.h>

Napi::String SayHi(const Napi::CallbackInfo& info) {
  Napi::Env env = info.Env();

  return Napi::String::New(env, "Hi!");
}

Napi::Object init(Napi::Env env, Napi::Object exports) {
    exports.Set(Napi::String::New(env, "sayHi"), Napi::Function::New(env, SayHi));
    return exports;
};

NODE_API_MODULE(hello_world, init);

index.js

const hello_world = require('bindings')('hello_world')

console.log(hello_world.sayHi());