What's the difference between engine.io and socket.io?

engine.io, node.js, socket.io

Solution

engine.io is a lower level library than socket.io.

Engine is to Socket.IO what Connect is to Express.

If you want the lower level abstraction, use engine.io. If you want a websocket abstraction, keep using socket.io.

engine.io is of more interest to you if you're building a library/framework on top of socket.io.

socket.io is of more interest to you if you're building an application on top of socket.io.

Problem

Regarding node.js, I'm using socket.io for real-time socket connection from the client application to the server application. I just heard about engine.io. Is engine.io a replacement for socket.io? I could not find any useful information on engine.io's website.

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