William Zhou z2015

#Four Ways To Do Pub/Sub With jQuery and jQuery UI (in the future)

Between jQuery 1.7 and some of work going into future versions of jQuery UI, there are a ton of hot new ways for you to get your publish/subscribe on. Here are just four of them, three of which are new.

(PS: If you're unfamiliar with pub/sub, read the guide to it that Julian Aubourg and I wrote here http://msdn.microsoft.com/en-us/scriptjunkie/hh201955.aspx)

##Option 1: Using jQuery 1.7's $.Callbacks() feature:

$.Callbacks are a multi-purpose callbacks list object which can be used as a base layer to build new functionality including simple publish/subscribe systems. We haven't yet released the API documentation for this feature just yet, but for more information on it (including lots of examples), see my post on $.Callbacks() here:

	<!doctype html>
	<html>
	<head>
	<title>iFrame memory leak prevention test</title>
	</head>
	<body>
	<h1>iFrame memory leak prevention test (void)</h1>

	<p>In IE up through version 8 adding an iframe to a page and
	removing it produces a memory leak in some cases. The pattern

	// Flyweight.js - Copyright Addy Osmani, 2012.
	// Consider public domain
	// My implementation in JS of this:
	// http://en.wikipedia.org/wiki/Flyweight_pattern

	// Simulate pure virtual inheritance/'implement' keyword for JS
	Function.prototype.implementsFor = function (parentClassOrObject) {
	if (parentClassOrObject.constructor == Function) {
	// Normal Inheritance
	this.prototype = new parentClassOrObject;

	/**
	Code copyright Dustin Diaz and Ross Harmes, Pro JavaScript Design Patterns.
	**/

	// Constructor.
	var Interface = function (name, methods) {
	if (arguments.length != 2) {
	throw new Error("Interface constructor called with " + arguments.length + "arguments, but expected exactly 2.");
	}
	this.name = name;

	formData.append(name, value);
	formData.append(name, value, filename);

	//https://developer.mozilla.org/en-US/docs/Web/API/FormData/append
	//The filename reported to the server (a USVString), when a Blob or File is passed as the second parameter. The default filename for Blob objects is "blob". The default filename for File objects is the file's filename.