chemdemo/post_message.js

## post_message.js
// see => http://jsperf.com/postmessage
var echoSetTimeout = (function() {
    return function(msg, cb) {
      setTimeout(cb, 0);
    }
  })();

  var echoWorker = (function() {
    var code = 'onmessage = function(e) { postMessage(e.data) };';
    var blobBuilder = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder;
    if(!blobBuilder) {
      return echoSetTimeout;
    }
    var bb = new (blobBuilder)();
    bb.append(code);

    var blobURL = (window.URL || window.webkitURL || window.mozURL).createObjectURL(bb.getBlob());
    var worker = new Worker(blobURL);

    return function(msg, cb) {
      worker.onmessage = cb;
      worker.postMessage(msg);
    };
  })();

  var echoIFramePostMessage = (function() {
    var iframe = document.createElement('iframe');
    window.onload = function() {
      iframe.style.display = 'none';
      document.body.appendChild(iframe);
      iframe.contentDocument.write('<html><head><script>onmessage = function(e) { e.source.postMessage(e.data, \'*\') };<'+'/script><'+'/head><'+'/html>');
    };

    return function(msg, cb) {
      window.onmessage = cb;
      iframe.contentWindow.postMessage(msg, '*');
    };
  })();

  var echoPostMessage = (function() {
    return function(msg, cb) {
      async = false;
      window.onmessage = cb;
      window.postMessage(msg, '*');
      async = true;
    };
  })();


  var payload = {
    shortString: 'test',
    simple: {
      foo: "bar",
      arr: []
    }
  };
	// see => http://jsperf.com/postmessage
	var echoSetTimeout = (function() {
	return function(msg, cb) {
	setTimeout(cb, 0);
	}
	})();

	var echoWorker = (function() {
	var code = 'onmessage = function(e) { postMessage(e.data) };';
	var blobBuilder = window.BlobBuilder \|\| window.WebKitBlobBuilder \|\| window.MozBlobBuilder;
	if(!blobBuilder) {
	return echoSetTimeout;
	}
	var bb = new (blobBuilder)();
	bb.append(code);

	var blobURL = (window.URL \|\| window.webkitURL \|\| window.mozURL).createObjectURL(bb.getBlob());
	var worker = new Worker(blobURL);

	return function(msg, cb) {
	worker.onmessage = cb;
	worker.postMessage(msg);
	};
	})();

	var echoIFramePostMessage = (function() {
	var iframe = document.createElement('iframe');
	window.onload = function() {
	iframe.style.display = 'none';
	document.body.appendChild(iframe);
	iframe.contentDocument.write('<html><head><script>onmessage = function(e) { e.source.postMessage(e.data, \'*\') };<'+'/script><'+'/head><'+'/html>');
	};

	return function(msg, cb) {
	window.onmessage = cb;
	iframe.contentWindow.postMessage(msg, '*');
	};
	})();

	var echoPostMessage = (function() {
	return function(msg, cb) {
	async = false;
	window.onmessage = cb;
	window.postMessage(msg, '*');
	async = true;
	};
	})();


	var payload = {
	shortString: 'test',
	simple: {
	foo: "bar",
	arr: []
	}
	};