crossmania

talk crossdomain with your browser. it's available through npm:

npm install crossmania

usage is simple:

var mania = require('crossmania'); // call .string() afterwards to talk raw strings

mania.get('/', function(request, respond) {
	respond({hello:'world'}); // yes we talk json
});
mania.post('/', function(request, data, respond) {
	respond(data); // we echo
});
mania.listen(80);

mania works by relying on cors based ajax if available (chrome, safari, firefox).
for IE8+ and Opera it uses an iframe proxy frame and the postMessage api. for IE7- and all others it falls back to an jsonp wrapper.

In the browser use the crossmania available for client-side javascript