node.js - socket.io try to listen to default apache port -


in node.js script, set socket.io listen on port 8080: 

client = require('socket.io').listen(8080).sockets);

then can connect io.connect('http://.../8080').

but why, in firefox/chrome consoles, see multiple requests on port 80? these : 

get http://.../socket.io/?eio=2&transport=polling&t=1408319587655-58 http://.../socket.io/?eio=2&transport=polling&t=1408319592695-59 http://.../socket.io/?eio=2&transport=polling&t=1408319597750-60

those links working port 8080.

shouldn't io.connect('http://...:8080') , not io.connect('http://.../8080') ?


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