ServingDemoInNode.js

const protoLoader = require('@grpc/proto-loader');
const grpcLibrary = require('grpc');

const options = {
    includeDirs: [
    './tensorflow_serving/apis/', 
    './tensorflow_serving/config/', 
    './tensorflow_serving/core/', 
    './tensorflow_serving/util/', 
    './tensorflow_serving/sources/', 
    './tensorflow/core/example/', 
    './tensorflow/core/lib/', 
    './tensorflow/core/framework/',
    './tensorflow/core/protobuf/',  
    './'
    ]
}

const packageDefinition = protoLoader.loadSync('prediction_service.proto', options);
console.log(Object.keys(packageDefinition)) // Returned all correctly loaded packages
const packageObject = grpcLibrary.loadPackageDefinition(packageDefinition);
console.log(packageObject)