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Add active class to <li> and leave it after hover

I have this code
<script>
$("li").hover(
function () {
$(this).addClass('active');
},
function () {
$(this).removeClass('active');
}
);
</script>
In order to add class active to my li in a menu.
<ul class="list-first-level">
<div about="" typeof="" class="ds-1col entity entity-paragraphs-item paragraphs-item-modulo-de-enlaces-item view-mode-modulo_de_enlaces_01_d clearfix">
<li id="elm" class="active always">
Undergraduate programmes
<ul>
<li>
Law
</li>
</ul>
</li>
</div>
</ul>
I need to not remove the active class after Im not hover on the element.

Just use this:
$("li").hover(function(){
$(this).addClass("active");
});
Although, you will end up with many active LI and does not provide a good UX.

When you hover over an element, remove the 'active' class from all li elements then add it back to the current element. This still means that if the user moves away from the last, hovered element - that element will remain in an 'active' state.
<script type="text/javascript">
$("li").hover(
function () {
$("li").removeClass('active');
$(this).addClass('active');
}
);
</script>

add active class to main menu using javascript

I have searched a lot for adding active class to the parent menu using javascript.
I found many more examples but not a single one is working for me, below is my code
HTML
<div id="menu1" class="hmenu">
<ul>
<li>Item1
<ul>
<li>SubItem1
<ul>
<li>SubSubItem1</li>
<li>SubSubItem2</li>
</ul>
</li>
<li>SubItem2 </li>
<li>SubItem3
<ul>
<li>SubSubItem1</li>
<li>SubSubItem2</li>
</ul>
</li>
</ul>
</li>
<li>Item2</li>
<li>Item3
<ul>
<li>SubItem1
<ul>
<li>SubSubItem1</li>
<li>SubSubItem2</li>
</ul>
</li>
</ul>
</li>
</ul>
<br style="clear: left" />
</div>
My requirement is when i click on SubItem1 then both Item1 and SubItem1 should be active.
And when i click on SubSubItem1 then SubSubItem1 ,SubItem1 and Item1 should be active.
Means when click on any link then its all parent link and the same link should be active.
I have tried with this javascript code :
$(document).ready(function () {
$('.hmenu ul li ul').find('li').click(function () {
//removing the previous selected menu state
$('.hmenu').find('li.active').removeClass('active');
//adding the state for this parent menu
$(this).parents('li').addClass('active');
});
});
Actually i don't have any experience with javascript coding and unable to figure out the problem in my code.
Can anyone suggest me for the same.

The issue comes from .find('li').click().
As you use nestsed <li>, this will cause the event to be fired two times when you click on a child <li>. This causes problems. Can not you add the click() to <a> elements?
$(document).ready(function () {
$('.hmenu a').click(function () {
//removing the previous selected menu state
$('.hmenu').find('li.active').removeClass('active');
//adding the state for this parent menu
$(this).parents("li").addClass('active');
});
});
It works just fine: https://jsfiddle.net/6put8tdx/
Note that your page will be bumped to the top while clicking to a tab because of # anchor. If you want to prevent this, you may pass the event to the function .click(function (event) {...} and add event.preventDefault inside.

If you need the click target to be the LI element (as opposed to Delgan's answer)
you can use .not() over the targeted LI's parents to prevent messing with the bubbling event targets:
$(document).ready(function () {
$('.hmenu').find('li').click(function(event) {
event.preventDefault(); // Prevent page jumps due to anchors
var $par = $(event.target).parents("li"); // get list of parents
$(".hmenu .active").not( $par ).removeClass("active"); // not them
$(this).addClass('active'); // let the event propagation do the work
});
});
$(document).ready(function () {
$('.hmenu').find('li').click(function(event) {
event.preventDefault();
var $par = $(event.target).parents("li");
$(".hmenu .active").not($par).removeClass("active");
$(this).addClass('active');
});
});
.active > a{
background: gold;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="menu1" class="hmenu">
<ul>
<li>Item1
<ul>
<li>SubItem1
<ul>
<li>SubSubItem1</li>
<li>SubSubItem2</li>
</ul>
</li>
<li>SubItem2 </li>
<li>SubItem3
<ul>
<li>SubSubItem1</li>
<li>SubSubItem2</li>
</ul>
</li>
</ul>
</li>
<li>Item2</li>
<li>Item3
<ul>
<li>SubItem1
<ul>
<li>SubSubItem1</li>
<li>SubSubItem2</li>
</ul>
</li>
</ul>
</li>
</ul>
<br style="clear: left" />
</div>
To better understand the above
The following example works out-of-the-box, and the clicked one and all it's LI parents get the "active" class.
Why? Cause the event target is li, means any li of .hmenu - so that click is attached to any of them, and clicking the subsub LI the event will propagate to the LI parents - triggering the same click behavior (this add class)!
$(".hmenu").on("click", "li", function(){
$(this).addClass("active"); // Wow! Event propagation rulez!!
});
But we need to remove existing .active and here it gets messy...
$(".hmenu").on("click", "li", function(){
$(".active").removeClass("active"); // triggered on every event bubble :(
$(this).addClass("active"); // leaving only the main parent with active class
});
That's caused by the concurrency that happens while the event bubbles and triggers the same actions for the parent elements.
One way to prevent that concurrency would be using a setTimeout of 1ms:
$(".hmenu").on("click", "li", function(){
$(".active").removeClass("active");
setTimeout(function(){ // Let the previous finish the bubbling mess
$(this).addClass("active"); // Yey! all fine! Every LI has the active class
}, 1);
});
But here the timeout of 1ms can lead to visual "blinking" issues.

Try this:
$(function () {
$("li a")
.on("click", function () {
$(this).toggleClass("active");
$(this).closest("ul").parent().children("li a").toggleClass("active")
.parent().parent().parent().children("li a").toggleClass("active");
});
});
fiddle
Traverse from the clicked element. And use toggleClass() to avoid the mundane checking if hasclass removeClass ...

Show divs with jQuery

I have this code http://jsfiddle.net/cwahL1tz/
My HTML
<ul class="myFilters">
<li data-type="A">A</li>
<li data-type="B">B</li>
<li data-type="C">C</li>
</ul>
<div class="filter">
<ul class="title">
<li>Assurance</li>
<li>Couverture</li>
<li>Banque</li>
<li>Alimentation</li>
</ul>
<div id="Assurance" class="category">
<ul>
<li>Groupama</li>
</ul>
</div>
<div id="Couverture" class="category">
<ul>
<li>Try it !</li>
</ul>
</div>
<div id="Alimentation" class="category">
<ul>
<li>AN example</li>
</ul>
</div>
</div>
Here's my JS script
jQuery(function ($) {
$('.myFilters li').click(function(){
$(".category").hide();
var v = $(this).text()[0]
$('.title li').hide().filter(function(){
return $(this).text().toUpperCase()[0] == v;
$(".category:first").show();
}).show()
})
$("a[data-toggle]").on("click", function(e) {
e.preventDefault(); // prevent navigating
var selector = $(this).data("toggle"); // get corresponding element
$(".category").hide();
$(selector).show();
});
});
It works fine but I trying to arrange some stuff but I'm stuck.
When I load the page all the links and divs appears, I just only want the divs of the first letter appear.
And when I click on C for example, I want the first div to show from the first link.
Thanks for your help !

EDITED:
On load:
$('.myFilters li:first').trigger('click');
And inside its click:
.first().find('a[data-toggle]:first').trigger('click');
jsfiddle DEMO

You can simply do that with first selecting the element with the right selector and then you can trigger the click event manually :
Show the Assurance content on load :
$('a[data-toggle="#Assurance"]').click();
Show first content on click :
$('.myFilters li').click(function(){
$(".category").hide();
var v = $(this).text()[0]
$('.title li').hide().filter(function(){
return $(this).text().toUpperCase()[0] == v;
}).show()
$('a[data-toggle]:visible:first').click();
})
Updated jsFiddle

Without going into any more javascript, you can display the content the way you would like using css selectors:
.category {display:none;}
.category:nth-of-type(1) {
display:block;
}
http://jsfiddle.net/5ageasm4/1/

Is this what you want. Check the Fiddle
I am basically just triggering the first item in the li
$(".title > li:first").find("a[data-toggle]").trigger("click");
and i am doing the same with the category.
EDIT
I updated my Fiddle
NEW EDIT
Created a new Fiddle, this one just removes all the duplicate code.
So basically i created these 2 functions
that.selectFirstElem = function(selector){
selector.find("a[data-toggle]").trigger("click");
};
that.loadFirstDataToggle = function(input){
return $('.title li').hide().filter(function(){
return $(this).text().toUpperCase()[0] == input;
}).show();
};
And those 2 functions you can just call in the places where you need it.

How to dynamically add a class to li item and change its background color using javascript and css

Here I have a list, what I want to do is I need to change the list ( li ) background color to different one after click on a specific list item. the thing is once it click on the link page will be redirected and refresh. please can me suggest a solution for to get this done?
<div id="main-menu">
<ul id="main-menu-list">
<li id="menu-home">Home</li>
<li id="menu-profile">My Profile</li>
<li id="menu-dashboard">My Dashboard</li>
<li id="menu-search">Search</li>
</ul>
</div>
what i did for this :
Java Script :
var make_button_active = function()
{
//Get item siblings
var siblings =($(this).siblings());
//Remove active class on all buttons
siblings.each(function (index)
{
$(this).removeClass('active');
}
)
//Add the clicked button class
$(this).addClass('active');
}
//Attach events to menu
$(document).ready(
function()
{
$("#main-menu li").click(make_button_active);
}
)
CSS :
#main-menu-list li.active {
background: #0040FF;
}

It's a little difficult to tell exactly what you want to do, but here's some quick and dirty (and untested) code:
/// when we click on an `a` tag inside the `#main-menu-list`...
$('#main-menu-list').on('click', 'a', function(e) {
// stop the link from firing
e.preventDefault();
e.stopPropagation();
// change the list item's background to green
$(this).closest('li').addClass('myClassName').css('background-color', 'green');
// do anything else, e.g. load in pages via ajax...
});
You could use CSS to apply the green background color, instead of jQuery:
.myClassName { background-color: green; }
This will stop the page from navigating, and I don't know if that's your intention. If you want to check the currently-loaded page against the menu to find the current item, you could do this (on page load) instead:
var currentPage = window.location.pathname;
$('#main-menu-list').find('a[href^="' + currentPage + '"]').closest('li').addClass('active');
EDIT:
Your amended Javascript code can be simplified to the following:
$('#main-menu li').on('click', 'a', function (e) {
e.preventDefault();
e.stopPropagation();
// only do the following if the clicked link isn't already active
if(!$(this).closest('li').hasClass('active')) {
$(this).closest('ul').find('.active').removeClass('active');
$(this).closest('li').addClass('active');
// load in your content via ajax, etc.
}
});
JSFiddle example

For each page you can add a class to the current list item that has "where the user is"..
CSS:
.selectedItem{
background-color: orange;//whatever color your want for the selected tab..
}
Then for each of your pages,
say you're in Dashboard.html
your menu code will look like:
<div id="main-menu">
<ul id="main-menu-list">
<li id="menu-home">Home</li>
<li id="menu-profile">My Profile</li>
<li id="menu-dashboard" class="selectedItem">My Dashboard</li>
<li id="menu-search">Search</li>
</ul>
</div>
in profile.html:
<div id="main-menu">
<ul id="main-menu-list">
<li id="menu-home">Home</li>
<li id="menu-profile" class="selectedItem">My Profile</li>
<li id="menu-dashboard">My Dashboard</li>
<li id="menu-search">Search</li>
</ul>
</div>
and so on..

You need to change the background color when the document is loaded (i.e. in document.ready).
Then you need a mechanism to connect the currently loaded page to one of your list items.
$(document).ready(function(){
//get the url from the current location or in some other way that suits your solution
//perhaps use window.location.pathname
var moduleId = "dashboard" // hardcoded to dashboard to make the point :);
$("#menu-"+moduleId).css("background-color", "#ccc");
});
http://jsfiddle.net/9JaVn/1/

jQuery Selector or Code Not Working

I'm creating a twitter-like app as a learning exercise and have the following at the beginning of my JS file:
$(function(){
setInterval(update, 3000);
$('.tweet li a.username').on('click', function() {
alert('hey!');
});
$('.showMore').on('click', function() {
moreIndex += 5;
update();
})
});
The alert() is filler for another function that I want to fire when the username is clicked. My generator is creating the following HTML for each tweet:
<ul class="tweets">
<ul class="tweet">
<li><a class="username" href="#">#jason:</a> tweet text </li><li class="date"> Date </li>
</ul>
</ul>
This is contained in a div with the class tweetDiv.
I've tried many selectors but am unable to get the alert to fire. Is my selector incorrect? Or is it something else?

It is something else. Your selector looks correct.
Most probably your code generates new tweets that don't have bound events. You should better use event delegation to fix that:
$('.tweets').on('click', '.tweet li a.username', function() {
alert('hey!');
});
Here .tweets element is supposed to be static and not regenerated dynamically.

First of all you need to make the wrapper function a self invoking function.
Moreover as you are binding a click even on 'a' tag hence you need to prevent its default behaviour.
Please refer to the fiddle
JS
(function () {
//setInterval(update, 3000);
$('.tweet li a.username').on('click', function (e) {
e.preventDefault();
alert('hey!');
});
$('.showMore').on('click', function () {
moreIndex += 5;
update();
})
})();
HTML
<ul class="tweets">
<ul class="tweet">
<li><a class="username" href="#">#jason:</a> tweet text</li>
<li class="date">Date</li>
</ul>
</ul>