event-handling

With jQuery you can bind functions to an event triggered on a DOM object using .bind() or one of the event handler helper functions. jQuery have to store this internally somehow and I wonder if is it possible given a DOM object, to find out which events have been bound to the object, and access those functions etc. The desired return result could look something like this: { click: [function1, function2], change: [function3], blur: [function4, function5, function6] } PatrikAkerstrand Edit : the method below works only in jQuery < 1.7 You can find a lot of interesting tips and tricks in this

When using jQuery to hookup an event handler, is there any difference between using the click method $().click(fn) versus using the bind method $().bind('click',fn); Other than bind's optional data parameter. For what it's worth, from the jQuery source : jQuery.each( ("blur,focus,load,resize,scroll,unload,click,dblclick," + "mousedown,mouseup,mousemove,mouseover,mouseout,mouseenter,mouseleave," + "change,select,submit,keydown,keypress,keyup,error").split(","), function(i, name){ // Handle event binding jQuery.fn[name] = function(fn){ return fn ? this.bind(name, fn) : this.trigger(name); }; });

This question already has an answer here: How to ensure an event is only subscribed to once 5 answers Duplicate of: How to ensure an event is only subscribed to once and Has an event handler already been added? I have a singleton that provides some service and my classes hook into some events on it, sometimes a class is hooking twice to the event and then gets called twice. I'm looking for a classical way to prevent this from happening. somehow I need to check if I've already hooked to this event... Explicitly implement the event and check the invocation list. You'll also need to check for

This question already has an answer here: Preserving a reference to “this” in JavaScript prototype functions [duplicate] 7 answers What is the correct way to preserve a this javascript reference in an event handler stored inside the object's prototype? I'd like to stay away from creating temp vars like '_this' or 'that' and I can't use a framework like jQuery. I saw a lot of people talk about using a 'bind' function but was unsure of how to implement it in my given scenario. var Example = function(foo,bar){ this.foo = foo; this.bar = bar; }; Example.prototype.SetEvent = function(){ this.bar

I'm creating buttons dynamically on an Excel userform with the following code: With Me.CurrentFrame.Controls.Add("Forms.CommandButton.1") .Caption = "XYZ" .name = "AButton" .Font.Bold = True .ForeColor = &HFF& ... blah blah blah End With I'd like to assign a function to run when these buttons are clicked, but I can't find a straightforward way to do this since there's no property as part of the button itself. Is there a way to do this using the above idiom? Should I be going about this whole thing in a different way? DJ. You need to dynamically create code / event handlers for each button. It

What happens if I bind two event handlers to the same event for the same element? For example: var elem = $("...") elem.click(...); elem.click(...); Does the last handler "win", or will both handlers be run? Both handlers will run, the jQuery event model allows multiple handlers on one element, therefore a later handler does not override an older handler. The handlers will execute in the order in which they were bound . Suppose that you have two handlers, f and g , and want to make sure that they are executed in a known and fixed order, then just encapsulate them: $("...").click(function(event