detect SharedWorker global scope and report to js in html

test644a.js

(function(global){
function handleConnect(e) {
	try {
		if(e.ports && e.ports[0]) {
			e.ports[0].onmessage = handleMessage(e.ports[0]);
		}
	} catch(e) {
	}
}

function handleMessage(o) {
	return function(e) {
		if(e.data.indexOf('start') > -1) {
			var str = '<table width="100%" border="1" cellspacing="0" cellpadding="2">\n';
			for (var i in global) {
				if(i!=='onconnect') {
					str += '<tr><td style="background: #AABBCC">' + i + '</td><td style="background: #DDEEFF">' + global[i] + '</td></tr>\n';
				} else {
					str += '<tr><td style="background: #AABBCC">' + i + '</td><td style="background: #DDEEFF">onconnect eventHandler</td></tr>\n';
				}
			}
			str += '</table>\n';
			o.postMessage(str);
		}
	};
}
global.onconnect = handleConnect;
})(this);