Develop Reference

JavaScript alert callback not working inside a function

I am trying to make a image preview containing of about 5-6 images which will appear one after another when user hovers over it (not like a carousel with prev and next buttons). Here is the fiddle consisting of what I gathered so far.. i don't know if this approach is right or not.. but I am stuck as the alert callback is not working. Could someone please tell me what is wrong?
$(function()
{
var imageCount = $('#product_grid_list').find('figure')[0].getElementsByTagName('img');
for (var i = 0, n = imageCount.length; i < n; i++) {
imageCount[i].on('click', function(e)
{
alert('Everything is going fine!');
}
);
}
}
);

The root cause of click event callback can't be triggered is that you're trying to register a event handler on a "DOM" (in this case: imageCount[i]) element in jQuery way. Try to register the event handler like this if you want to use pure javascript solution:
imageCount[i].addEventListener('click', function(e){
alert('Everything is going fine!');
});
Here is a jsfiddle demo.
Note: I didn't consider the cross browser issue in this case.
BTW, try to cache the length of imageCount node list, it will improve the performance.

You are using js AND jQuery at same time. It's wrong. If you use jQuery, than click event will be like this:
$(document).('click', '#product_grid_list figure img', function(){
alert('Everything is going fine!');
});

You are using a mix of jQuery and standalone javascript. You might as well go all the way to jQuery, with something like:
$('#product_grid_list figure:first img').click(function(e) {
alert('Everything is going fine, hopefully!');
});
You did not send the corresponding HTML, so we cannot test whether the above is correct.

it's just a simple click event in jQuery, no need to use js: http://jsfiddle.net/wP3QQ/11/
$('#product_grid_list').find('figure img').click(function(e){
alert('Everything is going fine!');
e.preventDefault();
});

You want the hover effect, so click event should not be used over here. It should be mouseover.
Working Fiddle
Code Snippet:
$(document).on('mouseover','#product_grid_list figure img',function(e){
alert("now it is working");
});

You are attempting to call on(), a jQuery method, on an HTMLElement (a DOM element). You can't do that, jQuery methods can only be called on jQuery collections. It's easy to get a jQuery collection for the elements you desire:
Use .find() to match the images
There's no need for a for() loop, jQuery's .on() will handle looping for you.
You may also want to prevent the default behaviour of your anchors
$(function () {
var imageCount = $('#product_grid_list').find('figure img');
imageCount.on('click', function (e) {
e.preventDefault()
alert('Everything is going fine!');
})
});
JSFiddle

Cross Browser Unselectable/Undraggable Images

For some reason my images are still able to dragged even though I've implemented a relevant code for this issue. I need to know why my images are still allowed to be dragged.
Here is the JSFiddle: http://jsfiddle.net/m3wQc/3/ (Updated JSFiddle)
Javascript: (All Caps removed)
#("#TESTDIV").bind("mousedown", function(event) {
$(document.body).addClass("UNSELECTABLE");
...
});
#(document.body).bind("mousemove", function(event) {
/* SOME CODE */
});
#("#TESTDIV").bind("mouseup", function(event) {
$(document.body).removeClass("UNSELECTABLE");
...
});

You should load Jquery in your fiddle and use a script like this:
$(".UNSELECTABLE").mousedown(function(){
return false;
});
Here is a working fiddle: http://jsfiddle.net/HSbf4/
This has all CSS removed to show you that none is needed with this approach. Should run in older Browsers too this way.

You'll need to check the jQuery API to align your code with the correctly spelled/cased APIs. JavaScript is case sensitive and your methods are all incorrect. This should get you going:
$('#testdiv').on('mousedown', function (event) {
$('body').addClass('unselectable');
});
I'd use .on() instead of .bind() as .on() is the preferred method.

Toggling one thing with two different elements

In my previous question I asked about how can I toggle a textarea with a paragraph. I got the answer. Now I want to do the opposite of it. First I was showing the already hidden textarea + 2 buttons by a click of a hyperlink. Now on the click of one of the buttons I want to hide the text + 2 buttons and show the paragraph that was first already shown.
I have tried this JS so far but it's not working:
$(document).ready(function () {
$(".no_link").click(function (e) {
e.preventDefault();
});
$(".edit_offer").on('click', function () {
toggleEditPanel($(this));
});
$("#cancel_edits").on('click', function () {
$(this).closest("button").hide();
$(this).closest("textarea").hide();
$(this).closest("p.content").show();
});
});
function toggleEditPanel(link) {
link.parent().parent().parent().find("textarea").toggle();
link.parent().parent().parent().find("button").toggle();
link.parent().parent().parent().find("p.content").toggle();
}
But its not working. How can I solve this error?
If I am trying to call the function toggleEditPanel() again. Its not working then aswell.
You can find the markup in the fiddle. Here's the fiddle.
UPDATE 1:
Just came up with a solution. I can use the $.siblings() function to toggle the elements beside the button. Still, is there any better solution?
Here's the code that I came up with:
$("#cancel_edits").on('click', function () {
$(this).hide();
$(this).siblings("button").hide();
$(this).siblings("textarea").hide();
$(this).siblings("p.content").show();
});
UPDATE 2:
The problem in the above code is that if there are more than one panels like this then the code is not working. How can I solve that issue aswell?

You are using Id for selector $("#cancel_edits") .
Id selectors returns only first element , so if there are multiple pannel it will work only for first.
Instead give some class name and use it for selector. Further you can use chaining and caching in your code for better performance.
$(".cancel_edits").on('click', function () {
var elm=$(this);
elm.add(elm.siblings("button,textarea")).hide();
elm.siblings("p.content").show();
});

I would recommend referencing your elements by ID:
$("#cancel_edits").on('click', function () {
$('#save_edits').hide();
$('#edited_content').hide();
$(this).hide();
$("p.content").show();
});
JSFiddle
The great thing about using IDs is that you are guaranteed they are unique - no need to use closest() to find the element you want. If, however, you're using classes instead, closest() might be necessary or helpful.

How to trigger a jQuery function to load again after another jQuery is executed?

I'm not that great with jQuery but basically, I have a jQuery that displays when scrolling down, new content.
But that new content has div that are under effect of another jQuery function that is called by ready.
So not it only the content that is loaded first when the page loads is working but when the new content is showing is not working on it to.
So I'm thinking maybe I can link the two jQuerys like a trigger when the second jQuery loads to execute the first one, is it possible? How?
Thanks!
UPDATE:
$(document).ready(function($){
$('.wrapper-hover').hover(
function () {
$(this).animate({opacity:'1'});
},
function () {
$(this).animate({opacity:'0'});
}
);
};

Try using Jquery .trigger() to trigger an event and then have something listen for that event
$(document).ready(function($){
//your event handler
$('body').on('event', function() {
$('.wrapper-hover').hover(
function () {
$(this).animate({opacity:'1'});
},
function () {
$(this).animate({opacity:'0'});
}
);
});
};
//when your inifinite scroll finishes trigger the event
$('body').trigger('event');
If all you're doing is attaching a hover event to that class you might also want to think about event delegation, still not sure what your intention is based on your question.

What I understood from your question is that you want a hover event on a div which works well when the page is loaded but it doesn't work when a new div renders. If this is so then try the following code.
$(document).ready(function($){
$('.wrapper-hover').on("mouseenter", function() {
$(this).animate({opacity: '0'}, 1000,
function() {
$(this).animate({opacity: '1'});
});
});
});

I resolved the issue with callback of the infinite scroll jquery. Thanks all!

How to set the focus for a particular field in a Bootstrap modal, once it appears

I've seen a couple of questions in regards to bootstrap modals, but none exactly like this, so I'll go ahead.
I have a modal that I call onclick like so...
$(".modal-link").click(function(event){
$("#modal-content").modal('show');
});
This works fine, but when I show the modal I want to focus on the first input element... In may case the first input element has an id of #photo_name.
So I tried
$(".modal-link").click(function(event){
$("#modal-content").modal('show');
$("input#photo_name").focus();
});
But this was to no avail. Lastly, I tried binding to the 'show' event but even so, the input won't focus. Lastly just for testing, as I had a suspiscion this is about the js loading order, I put in a setTimeout just to see if I delay a second, will the focus work, and yes, it works! But this method is obviously crap. Is there some way to have the same effect as below without using a setTimeout?
$("#modal-content").on('show', function(event){
window.setTimeout(function(){
$(event.currentTarget).find('input#photo_name').first().focus()
}, 0500);
});

Try this
Here is the old DEMO:
EDIT:
(Here is a working DEMO with Bootstrap 3 and jQuery 1.8.3)
$(document).ready(function() {
$('#modal-content').modal('show');
$('#modal-content').on('shown', function() {
$("#txtname").focus();
})
});
Starting bootstrap 3 need to use shown.bs.modal event:
$('#modal-content').on('shown.bs.modal', function() {
$("#txtname").focus();
})

Just wanted to say that Bootstrap 3 handles this a bit differently. The event name is "shown.bs.modal".
$('#themodal').on('shown.bs.modal', function () {
$("#txtname").focus();
});
or put the focus on the first visible input like this:
.modal('show').on('shown.bs.modal', function ()
{
$('input:visible:first').focus();
})
http://getbootstrap.com/javascript/#modals

I am using this in my layout to capture all modals and focus on the first input
$('.modal').on('shown', function() {
$(this).find('input').focus();
});

I had the same problem with bootstrap 3, focus when i click the link, but not when trigger the event with javascript.
The solution:
$('#myModal').on('shown.bs.modal', function () {
setTimeout(function(){
$('#inputId').focus();
}, 100);
});
Probably it´s something about the animation!

I had problem to catch "shown.bs.modal" event.. And this is my solution which works perfect..
Instead simple on():
$('#modal').on 'shown.bs.modal', ->
Use on() with delegated element:
$('body').on 'shown.bs.modal', '#modal', ->

Seems it is because modal animation is enabled (fade in class of the dialog), after calling .modal('show'), the dialog is not immediately visible, so it can't get focus at this time.
I can think of two ways to solve this problem:
Remove fade from class, so the dialog is immediately visible after calling .modal('show'). You can see http://codebins.com/bin/4ldqp7x/4 for demo. (Sorry #keyur, I mistakenly edited and saved as new version of your example)
Call focus() in shown event like what #keyur wrote.

I've created a dynamic way to call each event automatically. It perfect to focus a field, because it call the event just once, removing it after use.
function modalEvents() {
var modal = $('#modal');
var events = ['show', 'shown', 'hide', 'hidden'];
$(events).each(function (index, event) {
modal.on(event + '.bs.modal', function (e) {
var callback = modal.data(event + '-callback');
if (typeof callback != 'undefined') {
callback.call();
modal.removeData(event + '-callback');
}
});
});
}
You just need to call modalEvents() on document ready.
Use:
$('#modal').data('show-callback', function() {
$("input#photo_name").focus();
});
So, you can use the same modal to load what you want without worry about remove events every time.

I had the same problem with the bootstrap 3 and solved like this:
$('#myModal').on('shown.bs.modal', function (e) {
$(this).find('input[type=text]:visible:first').focus();
})
$('#myModal').modal('show').trigger('shown');

Bootstrap has added a loaded event.
https://getbootstrap.com/docs/3.3/javascript/#modals
capture the 'loaded.bs.modal' event on the modal
$('#mymodal').on('loaded.bs.modal', function(e) {
// do cool stuff here all day… no need to change bootstrap
})

Bootstrap modal show event
$('#modal-content').on('show.bs.modal', function() {
$("#txtname").focus();
})

A little cleaner and more modular solution might be:
$(document).ready(function(){
$('.modal').success(function() {
$('input:text:visible:first').focus();
});
});
Or using your ID as an example instead:
$(document).ready(function(){
$('#modal-content').modal('show').success(function() {
$('input:text:visible:first').focus();
});
});
Hope that helps..