Develop Reference

Add/Remove class based on URL slug

I'm bulding a hero section that consists of four horizontal accordion items, they expand when user clicks one of them.
One element is active on page load, because I pre-styled it with class "active".
I have code, that removes active class from an active element and sets the active class to the one that's been clicked.
The code looks like this:
<script>
$(".tabs_link").on("click", function () {
$(".tabs_link, .tabs_content").removeClass("active");
$(this).addClass("active");
$(this).next(".tabs_content").addClass("active");
});
</script>
The issue with code above is that it only works while users interact with the element, and I need those elements to open/close based on anchors in the link.
I have four anchors, I'd like them to open specific accordion by adding class "active" to the proper element.
The anchors:
#recover
#active
#mother
#kids
each one of .tabs_link and .tabs_content have combo classes so I could set the anchor to the specific child item f.e. .tabs_link.is-blue
Basically i have 4 url scenarios and i need the function to remove active class and set it on each element:
I was thinking to make a template and copy&paste it a couple of times.
f.e.
if(window.location.href.indexOf("#mother") {
$(".tabs_link, .tabs_content").removeClass("active");
$(this).addClass("active");
*// I don't know how to declare to what should I add class,
$(this).next(".tabs_content").addClass("active");
Heres the link to the website if you want to check it out and get to know the case better.
[https://fysioo.webflow.io/][1]

You can just use location.hash to add the class to the desired a tag.
Something like this:
function showContent() {
$(".tabs_link, .tabs_content").removeClass("active");
const aTag = $(`.tabs_link[href="${location.hash}"]`);
aTag.addClass('active');
aTag.next('.tabs_content').addClass('active');
}
showContent(); // on page load

How to change the class of a <li> element after clicking on a tab

I would like to modify the class of certain elements of my sidebar when some user clicks on a tab. In short, change the class of the sidebar elements to current class + " active"
I have implemented a partially working solution as I could after doing some research on my own.
This part of the code is key:
$(".setActive").click(function() {
$(".sidebar-item:contains('"+$(this).attr("data-target")+"')").parent().parent().addClass(' active');
})
Actually, with that line of code, I change the class to active but there is a problem:
I don't know how to remove the active class from the previously visited sidebar elements, then I am getting something like this:
How can I solve this issue?
JS FIDDLE LIVE DEMO

Remove all active class added before adding the current one
$(".setActive").click(function() {
$(".sidebar-element.active").removeClass('active');
$(".sidebar-item:contains('"+$(this).attr("data-target")+"')").parent().parent().addClass(' active');
})

Remove class from element and add to next element

I have a list of links, one has the class active.
On my next button click id like to remove the class from the current element and add it to the next only I cant seem to get it to add?
Ive made a fiddle to hopefully explain my problem, any help would be great, thanks
http://jsfiddle.net/h6D4k/
$('.next').click(function(){
$('ul.pagination').find('a.active').removeClass('active');
$('ul.pagination').find('a.active').next('a').addClass('active');
return false;
});

One of the jQuery most usable conveniencies is that its methods are (usually) chainable - in other words, they return the very object they are called from. So you can simply write this:
$('ul.pagination').find('a.active').removeClass('active').closest('li')
.next('li').find('a').addClass('active');
... as it's <li> elements that should be 'nexted', not <a> ones. But in fact, you shouldn't probably discard 'active' altogether if it's the last element in question:
var $a = $('ul.pagination').find('a.active'),
$li = $a.closest('li'),
$nextLi = $li.next('li');
if ($nextLi.length) {
$a.removeClass('active');
$nextLi.find('a').addClass('active');
}

This is actually what you want based on your html structure in you fiddle. http://jsfiddle.net/h6D4k/1/
$('ul.pagination').find('a.active').removeClass('active').parent()
.next().find('a').addClass('active');

Because once you've done this...
$('ul.pagination').find('a.active').removeClass('active');
There is no more a.active - the active classname has been removed from that element. So repeating the same selector...
$('ul.pagination').find('a.active')//...
... will select nothing.
Chain it all together instead.
$('ul.pagination').find('a.active').removeClass('active').next('a').addClass('active');
You have a second problem. According to the jQuery API for next(), it will:
Get the immediately following sibling of each element in the set of matched elements. If a selector is provided, it retrieves the next sibling only if it matches that selector.
You're not trying to get the following sibling:
<ul class="pagination">
<li><a class="one active" href="#">X</a></li>
<li><a class="two" href="#">X</a></li>
<li><a class="three" href="#">X</a></li>
</ul>
Next
Prev
You're trying to get the next <a> in the whole document. That's more challenging - and I'm not sure how to do it.

I would write it this way, preventing the action from doing anything on the last li as well.
http://jsfiddle.net/h6D4k/6/
$('.next').click(function(e){
e.preventDefault();
if ($("ul.pagination a.active").parent().is(":last-child")) return;
$('ul.pagination a.active').removeClass('active').parent().next().find("a").addClass('active');
});

You have two errors in your code:
Once removed, the active class can't be found anymore
your a tags are nested in li tags so next() doesn't work as you expect
To simplify things, you could attach the active class to the li tags.
Live demo: http://jsfiddle.net/h6D4k/7/
Code:
$('.next').click(function(){
$('ul.pagination').find('li.active').removeClass('active')
.next().addClass('active');
return false;
});

jQuery click function using same classes

I have a dropdown function that I need to work only on the div clicked, not all (I have 14+ of the same classes on the page that need to be displayed when a certain one is clicked)
At the moment my jQuery is as follows.
$('.qacollapsed').hide();
$('.qa').click(function () {
$('.qacollapsed').slideToggle();
$(this).toggleClass('active');
});
Of course, that is toggling all qacollapsed classes when there is 14 on the page (Q&A)
Is there a way for it to only drop down the one that is clicked?
the HTML
<div class="qa">
<h4 class="question"> </h4>
</div>
<div class="qacollapsed">
<p> </p>
</div>

It would be helpful to provide a snippet of HTML here, but I'll take a guess at the structure of your markup for now..
Instead of referencing all .qacollapsed elements, you need find elements that are close to the .qa that was clicked, e.g.:
$('.qa').click(function () {
$(this) // start with the clicked element
.find('.qacollapsed') // find child .qacollapsed elements only
.slideToggle();
$(this).toggleClass('active');
});
This will work if .qacollapsed is inside .qa - if not, you might need to use next (for siblings), or one of the other jQuery tree traversal methods.

Yo could find() it or use this as a context in the selector to choose only a descendent of the clicked object
$('.qa').click(function () {
$('.qacollapsed', this).slideToggle();
//You could do $(this).find('.qacollapsed').slideToggle();
$(this).toggleClass('active');
});

Check out the jQuery selectors and why not just use $(this)?

$('.qacollapsed').hide();
$('.qa').click(function () {
$(this).toggleClass('active').next().slideToggle();
});

Personally, I'd give all the divs IDs, the clickable bit being the ID of the question in the database for example, and the answer just being id='ID_answer' or something, then use jquery to slide in the div with the id corresponding to the link clicked, ie
Var showIt = $(this).attr('id') + '_answer'
$('.qacollapsed').not('#'+showIt).hide();
$('#'+showIt).slideToggle;
That will hide all the divs without that ID and show the required one.
Dexter's use of .next above looks simpler though, I've not tried that as being relatively new to jquery too.

JQuery: Making a tab active

Given this website: link text
How would one find an element and remove any class=selected and add it to the correct link?
That way when history, models, and the like links will look become selected when clicked upon.

The following code should do the trick in your case..
// when clicking a link inside the sub-navigation list
$('#sub-navigation a').click(function(){
// first remove the selected class from the active one
$('#sub-navigation li.selected').removeClass('selected');
// then find the parent li of the clicked element and add the selected class
$(this).parents('li').addClass('selected');
});
(it is tested on your example page and it works as expected..)

$("a").click(function(e) {
$("a.selected").removeClass("selected");
$(this).addClass("selected");
});