使用socket.io在io（）和io.connect（）之间的差异

Question

I would like to know what are the differences between

var socket = io();

and

var socket = io.connect();

using socket.io in my script (client side)

Thank you!

Answer 1

There is no difference.

If you look at the source code for the SocketIO client, io is declared as follows :

module.exports = exports = lookup;

And io.connect() is declared in the same way :

exports.connect = lookup;

They both refer to the same (internal) function lookup .

I think that io.connect exists to make the client backward compatible with older versions of SocketIO.