binding.gyp

{
  "targets": [
    {
      "target_name": "example_addon",
      "sources": [ "example_addon.c" ],
      "include_dirs": [ "<!@(node -p \"require('node-addon-api').include\")" ],
      "dependencies": [ "<!@(node -p \"require('node-addon-api').gyp\")" ]
    }
  ]
}

example_addon.c

#include <node_api.h>

napi_value Init(napi_env env, napi_value exports) {
  napi_status status;
  napi_value value;
  status = napi_create_uint32(env, 42, &value);
  if (status != napi_ok) {
    napi_fatal_error("Init", NAPI_AUTO_LENGTH, "Failed to create number",
        NAPI_AUTO_LENGTH);
  }

  status = napi_set_named_property(env, exports, "answer", value);
  if (status != napi_ok) {
    napi_fatal_error("Init", NAPI_AUTO_LENGTH, "Failed to assign property",
        NAPI_AUTO_LENGTH);
  }

  return exports;
}

NAPI_MODULE(NODE_GYP_MODULE_NAME, Init)

index.js

module.exports = require('./build/Release/example_addon.node');

package.json

{
  "name": "example",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "install": "node-gyp rebuild"
  },
  "author": "",
  "license": "Apache-2.0",
  "gypfile": true,
  "dependencies": {
    "node-addon-api": "^1.2.0"
  }
}