Engine.IO browser

This is the browser-only client for Engine.IO, the implementation of transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO.

How to use

Standalone

You can find an engine.io.js file in this repository, which is a standalone build you can use as follows:

<script src="/path/to/engine.io.js"></script>
<script>
  // eio = Socket
  const socket = eio("ws://localhost");
  socket.on("open", () => {
    socket.on("message", (data) => {});
    socket.on("close", () => {});
  });
</script>

With browserify

Engine.IO is a commonjs module, which means you can include it by using require on the browser and package using browserify:

1. install the package

   $ npm install engine.io-browser

2. write your app code

   const socket = require("engine.io-browser")("ws://localhost");
   socket.on("open", () => {
     socket.on("message", (data) => {});
     socket.on("close", () => {});
   });

3. build your app bundle

   $ browserify app.js > bundle.js

4. include on your page

   <script src="/path/to/bundle.js"></script>

Sending and receiving binary

<script src="/path/to/engine.io.js"></script>
<script>
  const socket = new eio.Socket("ws://localhost/");
  socket.binaryType = "blob";
  socket.on("open", () => {
    socket.send(new Int8Array(5));
    socket.on("message", (blob) => {});
    socket.on("close", () => {});
  });
</script>