我如何在HTML中实现浏览器到浏览器（点对点）连接？

<script src = "http://cdn.peerjs.com/0.3/peer.js"></script>

var peer = new Peer('pick-an-id', {key: 'myapikey'});

var conn = peer.connect('another-peers-id');conn.on('open', function(){   conn.send('Welcome!');});