Polyphony JS

Polyphony JS is a library for real-time text editing. It provides a thin wrapper API around libot, which is compiled to JavaScript using Emscripten. It can be used with node.js or within a browser.

Getting Started

If you're using polyphony from within a browser, simply include polyphony-debug.js or polyphony-release.js. The release version of Polyphony has various asm.js performance optimizations and is also minified.

<script type="text/javascript" src="polyphony-release.js"></script>

If you're using polyphony with node.js, simply install and require the polyphony npm module.

$ npm install polyphony

var polyphony = require("polyphony");

Creating a Client

The easiest way to create a Polyphony client is by using the Quill adapter. This adapter automatically turns a Quill.js editor into a real-time editor.

var client = new polyphony.Client("ws://localhost:51015");
var editor = new Quill("#editor");
var adapter = new polyphony.QuillAdapter(editor, client);

Creating a Server

A server is created by implementing the SocketServer and Socket interfaces. For a simple implementation of these interfaces, see the Polyphony site source.

var socketServer = ...;
var server = new polyphony.Server(socketServer);

Sample Project

The demo site for Polyphony serves as an excellent example of how to use Polyphony JS. It was built using a minimal amount of code and also has a bunch of walkthrough guides describing how everything works.

The code can be found at https://github.com/polyphony-ot/polyphony-site.

Building

Building Polyphony JS requires that Emscripten be installed and included in your PATH. Once you have Emscripten installed, you can build Polyphony JS by running make all.

After running make, there will be two JavaScript files in the bin directory. bin/debug/polyphony.js is a debug build with no optimizations and comments linking the asm.js code to the original C code. bin/release/polyphony.js has various optimizations and is minified. The release build should always be used in production, as it's significantly faster and smaller.