Develop Reference

Jquery - How to get elements in a list item

I have the following code:
<li class="shop-currencies">
€
£
$
R
</li>
When an item is clicked I want to set the class to the clicked item and get the ID of the item clicked. This is what I have so far:
$('.shop-currencies').click(function() {
var id = $(this).attr('id');
alert(id);
/**
* Remove the classes from the currency elements
*/
$('.shop-currencies').find('a').each(function(e) {
$(this).removeClass();
});
/**
* Set the class of the clicked element
*/
$( '#' + id).addClass('current');
});
The ID is being returned as 'undefined' How do I get the ID of the clicked link?
Thanks

You need to attach click handler to child anchor element :
$('.shop-currencies a').click(function() {
var id = $(this).attr('id');
alert(id);
/**
* Remove the classes from the currency elements
*/
$('.shop-currencies').find('a').not(this).removeClass('smclass')
/**
* Add class to current elements
*/
$(this).addClass('smclass')
});

There are a couple of options, Milind Anantwar has one, the other is to use the originally clicked element, which is passed to the event as a target property on the event argument. You can also simplify your code a lot. Please note that your bookmark anchors will cause the page to spring to the top, so also add e.preventDefault(); to any solution you choose:
$('.shop-currencies').click(function(e) {
e.preventDefault();
$('a', this).removeClass('current'); // remove related anchor current class
$(e.target).addClass('current');
});
JSFiddle: http://jsfiddle.net/TrueBlueAussie/5Lsuazvt/
The one downside to this is that clicking inside .shop-currencies, but not on a currency link, will clear the current selection. Because of this you are better off targetting the links instead:
$('.shop-currencies a').click(function(e) {
e.preventDefault();
$(this).siblings().removeClass('current'); // remove related anchor current class
$(this).addClass('current');
});
JSFiddle: http://jsfiddle.net/TrueBlueAussie/5Lsuazvt/1/
Which can be reduced to one line:
$('.shop-currencies a').click(function(e) {
e.preventDefault();
$(this).addClass('current').siblings().removeClass('current');
});
JSFiddle: http://jsfiddle.net/TrueBlueAussie/5Lsuazvt/2/
Saving the best for last
And one last point... It is more efficient (but hardly noticeable) to add a single delegated event handler, instead of attaching 4 seperate handlers:
$('.shop-currencies').on('click', 'a', function(e) {
e.preventDefault();
$(this).addClass('current').siblings().removeClass('current');
});
JSFiddle: http://jsfiddle.net/TrueBlueAussie/5Lsuazvt/3/
Final thoughts:
The IDs on the links are unnecessary if you have an appropriate this available. You can remove them from the HTML. You have the currency value you require in data-currency attributes, so you could use it like this:
$('.shop-currencies').on('click', 'a', function(e) {
e.preventDefault();
$(this).addClass('current').siblings().removeClass('current');
alert($(this).data('currency'));
});
JSFiddle: http://jsfiddle.net/TrueBlueAussie/5Lsuazvt/7/

your click, is attach to li instead of each a tag
so do $('a').click();instead

Shortest and fastest answer
$('.shop-currencies > a').click(function(){
$(this).siblings('a').removeClass('current');
$(this).addClass('current');
});
The code pen link is here, you can play with the code your self

$('.shop-currencies a').each(function() {
$(this).on("click", function(event) {
event.preventDefault();
var id = $(this).attr('id');
$('.shop-currencies a').removeClass("current");
$(this).addClass('current');
alert(id);
});
});
http://jsfiddle.net/nj37g5rm/8/

Removing active class if clicking active link a second time?

I came across a question that wanted to add an active link to the currently clicked menu item.
The solution was to add:
$("a").click(function(){
$("a").removeClass("active");
$(this).addClass("active");
});
Now how can we remove the active class if we click the active link a second time? I'm guessing we need to use toggleClass() but I haven't been able to make it work. Note only one link should have active class at a time.
Here is a demo: http://jsfiddle.net/A6dqQ/

You can do:
$('a').click(function(e){
e.preventDefault();
var $a = $(this);
$a.toggleClass('active').siblings().removeClass('active');
});

Use toggleClass() then:
$(this).toggleClass("active");
Code:
$("a").click(function(){
$(this).toggleClass("active");
$("a").not(this).removeClass("active");
});
FIDDLE DEMO

Check if current link is active then add/remove active class based on that, Try this:
$("a").click(function(){
var $this = $(this);
var isActive = $this.hasClass('active');
$("a").removeClass("active");
isActive ? $this.removeClass("active") : $this.addClass("active");
});
jsFiddle

here you have a simple answer:
$("a").on("click", function() {
$("a").removeClass("active");
$(this).addClass("active");
});
$("nav").on("mouseleave", function() {
$("nav").find("a").removeClass("active");
});
What this does is, when your mouse leaves the nav it will automatically remove you active class on a. here you have the DEMO

Something like this?
$("a").click(function () {
var $this = $(this);
if ($this.hasClass("active")) {
$this.removeClass("active");
} else {
$("a").removeClass("active");
$this.addClass("active");
}
});
Fiddle

Watch elements count by class using jQuery

I have simple HTML:
ul > li > button
And have some JavaScript code:
$('.side-filters .filters_list li').each(function(){
$(this).find('button').click(function(){
var arrList = $('.side-filters .filters_list li .active').map(function(){
return $(this).attr('id');
}).get();
if($(this).hasClass('active')) {
$(this).removeClass('active');
} else {
$(this).addClass('active');
}
});
});
If I click on a button, add class 'active' to the button, and if clicked again, remove class.
I need live count elements witn class 'active'. If there is at least one given ul class 'someclass' and if I click again and have no elements with class active, remove 'someclass' from the Ul.
How can I do this?

There is no need to loop through the elements and add a click to every button. Add one listener.
//listen for click on a button
$('.side-filters', "click", ".filters_list li button", function(){
//toggle the active class on the button
var button = $(this).toggleClass("active");
//see if anything is selected
var hasSelection = $('.side-filters .filters_list li .active').length > 0;
//toggle a class on the closest ul based on if anything is selected.
button.closest("ul").toggleClass("someclass", hasSelection);
});
References:
toggleClass(class [, switch])
.closest( selector )

You can add this function ()
function someclass () {
var count = $('.active').length;
if (count >= 1) {
$('ul').addClass('clasHere')
} else {
$('ul').removeClass('clasHere')
}
}

Add class to several elements

I have a cloned element and I want it so if I add a class to one of them it checks for active removes is and adds it to this and translates to the other. Here's what I'm working with:
$(document).ready(function() {
$("li").click(function(){
/*Here I want to add something like var active = $(.clonedelement + this, this)
but that does probably not makes sense, so what should i do? */
var active = $(this)
// If this isn't already active
if (!$(this).hasClass("active")) {
// Remove the class from anything that is active
$("li.active").removeClass("active");
// And make this active
active.addClass("active");
}
});
});
Right now, it removes the current active from both, not does only add class to one.
I made a jsfiddle of it
http://jsfiddle.net/pintu31/8BxuE/
function UpdateTableHeaders() {
$(".persist-area").each(function() {
var el = $(this),
offset = el.offset(),
scrollTop = $(window).scrollTop(),
Header = $("#headerny", this)
if ((scrollTop > offset.top) && (scrollTop < offset.top + el.height())) {
Header.addClass("floatingHeader");
} else {
Header.removeClass("floatingHeader");
};
});
}
// DOM Ready
$(function() {
$(window)
.scroll(UpdateTableHeaders)
.trigger("scroll");
});

If you just need to highlight the clicked element with the class of active, and remove all others then try this:
$("li").click(function(){
$("li").removeClass("active");
$(this).addClass("active");
});
You don't really need to check if either this, or others already have the class, simply steamroller to 'active' class off all the others and add it to the one that's been clicked

try this
demo updated 1
demo updated 2 //with clone(true)
demo updated 3 //with clone(false) - default
demo updated 4
$(document).ready(function() {
$(document).on('click', 'li', function(){
var ind = $(this).index();
$('li').removeClass('active');
$('li').eq(ind).addClass('active');
$('#header1').empty();
$('#header').find('ul').clone(true).appendTo( '#header1' );
});
});

$(document).ready(function() {
$("li").click(function(){
$("li").removeClass("active");
// And make this active
$(this).addClass("active");
}
});
});

jQuery Add Class on Click but only allowed once.

Here is what I have so far:
Javascript:
$(document).ready(function() {
$(".thumb_wrapper").click(function() {
$(this).addClass("active");
});
});
So this is working, it is adding the class but I want only one item to be active at all times. So when I click on an item, and it turns active, the next item I click on should be the new active one, and remove the class on the previous one.
Does that make sense? How can I do something like this?
Thanks!

You need to first remove the active class from your thumb_wrapper elements. Try this:
$(".thumb_wrapper").click(function() {
$(".thumb_wrapper").removeClass("active");
$(this).addClass("active");
});

Cache your wrapper and call a removeClass() on it first:
var $wrapper = $(".thumb_wrapper");
$wrapper.click(function() {
$wrapper.removeClass("active");
$(this).addClass("active");
});

$(".thumb_wrapper").on('click', function() {
$(".thumb_wrapper").removeClass('active').find(this).addClass("active");
});

This should do it.
$(document).ready(function() {
$(".thumb_wrapper").click(function() {
$(this).parent().children().each(function() {
$(this).removeClass("active");
});
$(this).addClass("active");
});
});

$(document).ready(function(){
$('.what').click(function(){
$('.what').removeClass('active');
$(this).addClass('active');
});
});
I assume something like this?