Develop Reference

jQuery Combine delegate statements

I have the following jQuery code at 2 places of the same JS file;
$("#myGrid").delegate(".icon-right", "click", function() {
//Some code
});
$("#myGrid").delegate(".icon-down", "click", function() {
//Some code
});
So the diff is I am listening to click events on icon-down/icon-right
Is it possible to optimize / merge these 2 statements ?

Combine both of them
$("#myGrid").delegate(".icon-right", "click", function () {
//Some code
}).delegate(".icon-down", "click", function () {
//Some code
});
Use .on() after jQuery 1.7

Make the selector match both:
$("#myGrid").delegate(".icon-right,.icon-down", "click", function() {
//Some code
});

Try to use the multiple selector,
same function for all the elements:
$("#myGrid").delegate('click','.icon-right,.icon-down', function(e){
});
different functionality for different elements:
$("body").delegate('click','.icon-right,.icon-down', function(e){
if ($(this).is('.icon-right')) { }
else { }
});

yes you can do this:
$("#myGrid").delegate(".icon-right, .icon-down", "click", function () {
if(this.className === 'icon-right'){ // some code}
else if(this.className === 'icon-down'){ // some code}
});
If you are using jquery 1.7+ then you can try with .on() with switch:
$("#myGrid").on("click", ".icon-right, .icon-down", function () {
switch(this.className){
case 'icon-right':
//some code
break;
case 'icon-down':
// some code
break;
}
});

On/off click event on alternating tabs

$('#filter').on('click', function(){
$('#sort').off('click');
console.log($(this));
});
$('#sort').on('click', function(){
$('#filter').off('click');
console.log($(this))
});
$('.close').on('click', function () {
console.log($(this));
$('#sort').on('click');
$('#filter').on('click');
});
Why doesnt the div .close give back the on method to the divs above if they have the same selector id?
EDIT: For clarity, I'm wanting to temporarily remove the on event on whichever of the two elements wasn't clicked (#filter or #sort). Then clicking '.close' will return the said element back to having the on method again.

The off() does not work the way you think. It actually removes the event handlers (callback functions), not just hides them, so you cannot restore them with a simple on(), they are not stored any longer by the element after the off(), you have to add them again. It is not easy to track whether an event handler is added, so I suggest another approach.
var sort = true;
var filter = true;
$('#filter').on('click', function(){
if (!filter)
return;
sort = false;
console.log($(this));
});
$('#sort').on('click', function(){
if (!sort)
return;
filter = false;
console.log($(this))
});
$('.close').on('click', function () {
console.log($(this));
sort = true;
filter = true;
});
Another approach to use toggle() and combine it with the on() and off() functions. Hmm I found that jquery toggle() is not loosely coupled to dom elements, so you cannot do this with that. You have to create your own implementation, for example something like this:
function toggle(options) {
var currentValue = !!options.value;
return function (value){
if (value === undefined)
value = !currentValue;
if (value != currentValue)
if (value) {
currentValue = true;
options.on();
}
else {
currentValue = false;
options.off();
}
};
}
With this toggle implementation your code will be the following:
var switches = {
sort: toggle({
on: function (){
$('#sort').on('click', function(){
switches.filter(false);
console.log($(this))
});
},
off: function (){
$('#sort').off('click');
}
}),
filter: toggle({
on: function (){
$('#filter').on('click', function(){
switches.sort(false);
console.log($(this));
});
},
off: function (){
$('#filter').off('click');
}
})
};
$('.close').on('click', function () {
console.log($(this));
switches.sort(true);
switches.filter(true);
});
switches.sort(true);
switches.filter(true);

You can try with:
$('#filter:not(.off)').on('click', function(){
$('#sort').addClass('off');
console.log($(this));
});
$('#sort:not(.off)').on('click', function(){
$('#filter').addClass('off');
console.log($(this))
});
$('.close').on('click', function(){
$('#sort').removeClass('off');
$('#filter').removeClass('off');
console.log($(this));
});

I'm assuming that in your block of code…
$('.close').on('click', function () {
console.log($(this));
$('#sort').on('click');
$('#filter').on('click');
});
You want to click #sort and #filter. To do such, you'll need to do the following:
$('.close').on('click', function () {
console.log($(this));
$('#sort').click();
$('#filter').click();
});
Even so, it would probably be better to wrap the other event handlers in a function and call them like such:
$('.close').on('click', function () {
console.log($(this));
sortClickFunction();
filterClickFunction();
});

This will do anything: $('#sort').on('click');
You need to call: $('#sort').trigger('click');

Onclick function on td element Kendo Scheduler

I have a table that is generated by a Kendo Scheduler.
I have to add a click function on each td on document load.
For now, I have tried this:
$(document).ready(function () {
$('td.k-nonwork-hour').click(function () {
alert("Hello");
});
});
For adding a onclick function. I have also tried with onclick
$(document).ready(function () {
$('td.k-nonwork-hour').onclick =function () {
alert("Hello");
};
});
But none of them works. Anyone knows a solution? :)

Better use delegated event instead of attaching event handler to each cell.
e.g.
scheduler.wrapper.on("click", "td.k-nonwork-hour", function() {
alert("Non working day!")
});
Here is live example.

scheduler.wrapper.on("mouseup touchend", ".k-scheduler-table td, .k-event", function(e) {
var target = $(e.currentTarget);
if (target.hasClass("k-event")) {
var event = scheduler.occurrenceByUid(target.data("uid"));
scheduler.editEvent(event);
} else {
var slot = scheduler.slotByElement(target[0]);
scheduler.addEvent({
start: slot.startDate,
end: slot.endDate
});
}
});

Jquery on hover not functioning

I'm changing my codes to be compatible with jQuery 1.8 and I'm stuck with this hover which doesn't work. When I used then same thing with a click it worked. Here is my code, can anyone tell me where I'm going wrong?
$(document).on('hover', '.top-level', function (event) {
$(this).find('.actionfcnt').show();
$(this).find('.dropfcnt').show();
}, function () {
$(this).find('.dropfcnt').hide('blind', function () {
$('.actionfcnt').hide();
});
});

Deprecated as of jQuery 1.8: The name "hover" used as a shorthand for the string "mouseenter mouseleave". It attaches a single event handler for those two events, and the handler must examine event.type to determine whether the event is mouseenter or mouseleave. Do not confuse the "hover" pseudo-event-name with the .hover() method, which accepts one or two functions.
Source: http://api.jquery.com/on/#additional-notes
That pretty much says it all, you cant use "hover" for that:
$(document).on('mouseenter','.top-level', function (event) {
$( this ).find('.actionfcnt').show();
$( this ).find('.dropfcnt').show();
}).on('mouseleave','.top-level', function(){
$( this ).find('.dropfcnt').hide('blind', function(){
$('.actionfcnt').hide();
});
});

there is no "hover" event.
there is .hover() function that takes 2 callbacks (as in your example).

Try:
$(".top-level").on({
mouseenter: function (event) {
$( this ).find('.actionfcnt').show();
$( this ).find('.dropfcnt').show();
},
mouseleave: function (event) {
$( this ).find('.dropfcnt').hide('blind', function(){
$('.actionfcnt').hide();
});
}
});
OR
$(".top_level").on("hover", function(event) {
if(event.type == "mouseenter") {
$( this ).find('.actionfcnt').show();
$( this ).find('.dropfcnt').show();
}
else if (event.type == "mouseleave") {
$( this ).find('.dropfcnt').hide('blind', function(){
$('.actionfcnt').hide();
});
}
});

.on function has only 3 parameters : http://api.jquery.com/on/
If you don't need your handlers be bound to dynamically added elements as well, then you may use the good old hover function with 2 event handlers.
$('.top-level').hover(function (event) {
$(this).find('.actionfcnt').show();
$(this).find('.dropfcnt').show();
}, function (event) {
$(this).find('.dropfcnt').hide('blind', function(){
$('.actionfcnt').hide();
});
});​
By the way, $(selector).hover(handlerIn, handlerOut) is shorthand for $(selector).mouseenter(handlerIn).mouseleave(handlerOut);.
If you need to, then use on for mouseenter and mouseleave events:
$(document).on('mouseenter', '.top-level', function (event) {
$(this).find('.actionfcnt').show();
$(this).find('.dropfcnt').show();
}).on('mouseleave', '.top-level', function (event) {
$(this).find('.dropfcnt').hide('blind', function(){
$('.actionfcnt').hide();
});
});​

Try
$('.top-level').hover(function (event) {
$( this ).find('.actionfcnt').show();
$( this ).find('.dropfcnt').show();
}, function(){
$( this ).find('.dropfcnt').hide('blind', function(){
$('.actionfcnt').hide();
});
});

How to give two functions to delegate function

I'm using JQuery and trying to use delegate for the hover action. Problem is the hover action can get two handlers, the handle in and the handle out. How can I achieve this using delegate?
I've tried this and it didn't work:
$(document).delegate('.box', 'hover',
function() { $(".a").addClass(".hover");},
function() { $(".a").removeClass(".hover");});

According to the docs for .hover:
$(selector).mouseenter(handlerIn).mouseleave(handlerOut);
So you should be able to just call delegate once for each of these functions:
$(document)
.delegate('.box', 'mouseenter', function() { alert(1); })
.delegate('.box', 'mouseleave', function() { alert(2); });

An alternative to #Justin's solution is to check the event type in the callback:
function onMouseenter()
{
alert(1);
}
function onMouseleave()
{
alert(2);
}
$(document).delegate('.box', 'hover', function(event)
{
if (event.type === 'mouseenter') onMouseenter.apply(this, arguments);
else onMouseleave.apply(this, arguments);
});
That said, it's unnecessary to use .delegate() if you're just going to delegate to document. Use .live() instead, which is much more concise:
$('.box').live('hover', function (event)
{
// snip...
});