Grunt Build

This is the base directory for the Apache Thrift JavaScript library. This directory contains a Gruntfile.js and a package.json. Many of the build and test tools used here require a recent version of Node.js to be installed. To install the support files for the Grunt build tool execute the command:

npm install

This reads the package.json and pulls in the appropriate sources from the internet. To build the JavaScript branch of Apache Thrift execute the command:

npx grunt

This runs the grunt build tool (from within ./node_modules/.bin/), linting all of the source files, setting up and running the tests, concatenating and minifying the main libraries and generating the html documentation.


The following directories are present (some only after the grunt build): /src - The JavaScript Apache Thrift source /doc - HTML documentation /dist - Distribution files (thrift.js and thrift.min.js) /test - Various tests, this is a good place to look for example code /node_modules - Build support files installed by npm

Example JavaScript Client and Server

The listing below demonstrates a simple browser based JavaScript Thrift client and Node.js JavaScript server for the hello_svc service.

hello.thrift - Service IDL

### build with: $ thrift -gen js -gen js:node hello.thrift service hello_svc { string get_message(1: string name) }

hello.html - Browser Client

<!DOCTYPE html>
<html lang="en">
    <meta charset="utf-8">
    <title>Hello Thrift</title>
    Name: <input type="text" id="name_in">
    <input type="button" id="get_msg" value="Get Message" >
    <div id="output"></div>
    <script src="thrift.js"></script>
    <script src="gen-js/hello_svc.js"></script>
      (function() {
        var transport = new Thrift.TXHRTransport("/hello");
        var protocol  = new Thrift.TJSONProtocol(transport);
        var client    = new hello_svcClient(protocol);
        var nameElement = document.getElementById("name_in");
        var outputElement = document.getElementById("output");
          .addEventListener("click", function(){
            client.get_message(nameElement.value, function(result) {
              outputElement.innerHTML = result;

hello.js - Node Server

var thrift = require('thrift');
var hello_svc = require('./gen-nodejs/hello_svc.js');

var hello_handler = {
  get_message: function(name, result) {
    var msg = "Hello " + name + "!";
    result(null, msg);

var hello_svc_opt = {
  transport: thrift.TBufferedTransport,
  protocol: thrift.TJSONProtocol,
  processor: hello_svc,
  handler: hello_handler

var server_opt = {
  staticFilePath: ".",
  services: {
    "/hello": hello_svc_opt

var server = Thrift.createWebServer(server_opt);
var port = 9099;
console.log("Http/Thrift Server running on port: " + port);


TypeScript definition files can also be generated by running:

thrift --gen js:ts file.thrift

Breaking Changes


  1. 64-bit integer constants are now generatd using node-int64 e.g.: var x = new Int64(“7fffffffffffffff”);