Develop Reference

How to track if each clicked item has been clicked before (or is its first click)

I have an issue of getting the first click per link clicked, I have tried with one click event .one() but since I'm preventing the default it cause a redirection. I want to get add something if item clicked is equal to 1 and remove if clicked more than one time per a link.
// $('.menu>li>a').one('click', function(e){});
let clickCount = 0;
$('.menu>li>a').on('click', function(e) {
clickCount++;
let $this = $(this);
if (clickCount == 1) {
//show loader
$('.loader').show();
setTimeout(function() {
$('.loader').hide();
}, 5000);
$this.next('.dropdown').addClass('active');
} else {
$this.next('.dropdown').addClass('active');
}
e.preventDefault()
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="menu">
<li>item1
<ul class="dropdown">
<li>content1</li>
</ul>
</li>
<li>item2
<ul class="dropdown">
<li>content1</li>
</ul>
</li>
<li>item3
<ul class="dropdown">
<li>content1</li>
</ul>
</li>
</ul>

Try using jQuery's data storage to know if a link has been clicked before. This would allow you to track each link individually:
// $('.menu>li>a').one('click', function(e){});
$('.menu>li>a').on('click', function(e) {
let $this = $(this);
const firstClick = !$this.data('clickedBefore');
if (firstClick) {
$this.data('clickedBefore', true)
//show loader
$('.loader').show();
setTimeout(function() {
$('.loader').hide();
}, 5000);
$this.next('.dropdown').addClass('active');
} else {
$this.next('.dropdown').addClass('active');
}
e.preventDefault()
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="menu">
<li>item1
<ul class="dropdown">
<li>content1</li>
</ul>
</li>
<li>item2
<ul class="dropdown">
<li>content1</li>
</ul>
</li>
<li>item3
<ul class="dropdown">
<li>content1</li>
</ul>
</li>
</ul>
Update:
is there another alternative without using data('clickedBefore', true) and adding class to link to achieve the same result?
Yes. Generally speaking, if all you need is just some control properties, using data is cleaner than adding classes. But if you intend to style the element or if your project already uses classes for control elsewhere (so keeping consistency would matter), it could make sense to use them instead:
// $('.menu>li>a').one('click', function(e){});
$('.menu>li>a').on('click', function(e) {
let $this = $(this);
const firstClick = !$this.hasClass('clicked-before');
if (firstClick) {
$this.addClass('clicked-before');
//show loader
$('.loader').show();
setTimeout(function() {
$('.loader').hide();
}, 5000);
$this.next('.dropdown').addClass('active');
} else {
$this.next('.dropdown').addClass('active');
}
e.preventDefault()
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="menu">
<li>item1
<ul class="dropdown">
<li>content1</li>
</ul>
</li>
<li>item2
<ul class="dropdown">
<li>content1</li>
</ul>
</li>
<li>item3
<ul class="dropdown">
<li>content1</li>
</ul>
</li>
</ul>

You can just add two event listeners for both use cases. One for you to disable the default behavior and one for the click you would like to capture.
let clickCount = 0;
$('.menu > li > a').on('click', function(e) {
console.log('checking click for things');
clickCount++;
let $this = $(this);
if (clickCount === 1) {
console.log('Only the first click will show the loader');
$('.loader').show();
setTimeout(function() {
$('.loader').hide();
}, 5000);
$this.next('.dropdown').addClass('active');
} else {
$this.next('.dropdown').addClass('active');
}
});
$('.menu > li > a').on('click', function(e) {
e.preventDefault();
console.log('All clicks will prevent default');
});
.loader {
display: none;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="menu">
<li>item1
<ul class="dropdown">
<li>content1</li>
</ul>
</li>
<li>item2
<ul class="dropdown">
<li>content1</li>
</ul>
</li>
<li>item3
<ul class="dropdown">
<li>content1</li>
</ul>
</li>
</ul>
<div class="loader">Loader</div>

Dropdown Button Closing on every click anywhere on the drop down

I made a dropdown that I took from templates on the internet. Here's what I've comed up with but is having a trouble. The problem is, everytime I'm clicking on each link on the dropdown, the dropdown closes. Here's the code:
jQuery(document).ready(function($){
//open/close mega-navigation
$('.cd-dropdown-trigger').on('click', function(event){
event.preventDefault();
toggleNav();
});
//close meganavigation
$('.cd-dropdown .cd-close').on('click', function(event){
event.preventDefault();
toggleNav();
});
//on mobile - open submenu
$('.has-children').children('a').on('click', function(event){
//prevent default clicking on direct children of .has-children
event.preventDefault();
var selected = $(this);
selected.next('ul').removeClass('is-hidden').end().parent('.has-children').parent('ul').addClass('move-out');
});
//on desktop - differentiate between a user trying to hover over a dropdown item vs trying to navigate into a submenu's contents
var submenuDirection = ( !$('.cd-dropdown-wrapper').hasClass('open-to-left') ) ? 'right' : 'left';
$('.cd-dropdown-content').menuAim({
activate: function(row) {
$(row).children().addClass('is-active').removeClass('fade-out');
if( $('.cd-dropdown-content .fade-in').length == 0 ) $(row).children('ul').addClass('fade-in');
},
deactivate: function(row) {
$(row).children().removeClass('is-active');
if( $('li.has-children:hover').length == 0 || $('li.has-children:hover').is($(row)) ) {
$('.cd-dropdown-content').find('.fade-in').removeClass('fade-in');
$(row).children('ul').addClass('fade-out')
}
},
exitMenu: function() {
$('.cd-dropdown-content').find('.is-active').removeClass('is-active');
return true;
},
submenuDirection: submenuDirection,
});
//submenu items - go back link
$('.go-back').on('click', function(){
var selected = $(this),
visibleNav = $(this).parent('ul').parent('.has-children').parent('ul');
selected.parent('ul').addClass('is-hidden').parent('.has-children').parent('ul').removeClass('move-out');
});
function toggleNav(){
var navIsVisible = ( !$('.cd-dropdown').hasClass('dropdown-is-active') ) ? true : false;
$('.cd-dropdown').toggleClass('dropdown-is-active', navIsVisible);
$('.cd-dropdown-trigger').toggleClass('dropdown-is-active', navIsVisible);
if( !navIsVisible ) {
$('.cd-dropdown').one('webkitTransitionEnd otransitionend oTransitionEnd msTransitionEnd transitionend',function(){
$('.has-children ul').addClass('is-hidden');
$('.move-out').removeClass('move-out');
$('.is-active').removeClass('is-active');
});
}
}
//IE9 placeholder fallback
//credits http://www.hagenburger.net/BLOG/HTML5-Input-Placeholder-Fix-With-jQuery.html
if(!Modernizr.input.placeholder){
$('[placeholder]').focus(function() {
var input = $(this);
if (input.val() == input.attr('placeholder')) {
input.val('');
}
}).blur(function() {
var input = $(this);
if (input.val() == '' || input.val() == input.attr('placeholder')) {
input.val(input.attr('placeholder'));
}
}).blur();
$('[placeholder]').parents('form').submit(function() {
$(this).find('[placeholder]').each(function() {
var input = $(this);
if (input.val() == input.attr('placeholder')) {
input.val('');
}
})
});
}
});
HTML Code
<div class="cd-dropdown-wrapper nav-div cd-dropdown-trigger" href="#0" id="nav-icon2">
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<nav class="cd-dropdown">
<h2>Title</h2>
Close
<ul class="cd-dropdown-content">
<li class="has-children">Catalog
<ul class="cd-secondary-dropdown is-hidden">
<li class="go-back">Menu</li>
<li class="see-all">All Products</li>
<li class="has-children">Travel Gear
<ul class="is-hidden">
<li class="go-back">Clothing</li>
<li class="has-children">Soft Shell
<ul class="is-hidden">
<li class="go-back"></li>
<li>Soft Shell Gen1</li>
<li>Soft Shell Joey</li>
<li class="see-all">All Soft Shell Jackets</li>
</ul>
</li>
<li class="has-children">Sweatshirts
<ul class="is-hidden">
<li class="go-back"></li>
<li class="see-all">All Sweatshirt Jackets</li>
<li>Sweatshirts Gen1</li>
<li>Sweatshirt Joey</li>
</ul>
</li>
<li class="has-children">Polar Fleece
<ul class="is-hidden">
<li class="go-back"></li>
<li class="see-all">All Polar Fleece</li>
<li>Polar Fleece Gen1</li>
<li>Joey Polar Fleece</li>
</ul>
</li>
<li>Windbreakers</li>
<li>Travel Pillow</li>
</ul>
</li>
</ul>
<!-- .cd-secondary-dropdown -->
</li>
<li>About Us</li>
<li>FAQ</li>
<li>Make Money Selling our Jackets</li>
</ul>
<!-- .cd-dropdown-content -->
</nav>
<!-- .cd-dropdown -->
</div>
<script>
$(document).ready(function(){
$('#nav-icon2').click(function(){
$(this).toggleClass('open');
});
});
$("document").ready(function() {
$('#nav-icon2').on('click', function(e) {
if($(this).hasClass('open')) {
e.stopPropagation();
}
});
});
</script>

if you have a open and close button, you should do a hide show. not a toggle.
for instance have a button that adds a style or adds a class with the CSS display:none;
<div style="display:none;">Hidden Stuff</div>
then have a button that gives it the CSS property display:block;
<div style="display:block;">Shown Stuff</div>
but more importantly, its not included in the snippit but i thought i'd ask, do you include jQuery in the <head> tag of your index.html?

Trying to add active class to menu item

I've spent 2 hours trying to create an active menu with no success, so I figured I would ask for help. I have an html menu, some js & css...
$(function() {
var pgurl = window.location.href.substr(window.location.href
.lastIndexOf("/") + 1);
$("#index li a").each(function() {
if ($(this).attr("href") == pgurl || $(this).attr("href") == '')
$(this).addClass("active");
})
});
.active { font-weight:bold;}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id='index'>
<div class='container'>
<div class='top'>
<h1><a href='/' title='The Maths Project'>The Maths Project</a></h1>
</div>
<ul class='section active_section' id='section_2'>
<li><span id='section_title_2' class='section_title'><a href='#' id='section_link_2'>Against the odds.</a></span>
<ul>
<li id='exhibit_106' class='exhibit_title'> → Introduction
</li>
<li id='exhibit_83' class='exhibit_title'><a href='../against-the-odds/deriving-functions'> → Deriving functions</a>
</li>
<li id='exhibit_83' class='exhibit_title'><a href='../against-the-odds/exploiting-odds'> → Exploiting odds</a>
</li>
</ul>
</li>
</ul>
<ul class='section' id='section_3'>
<li><span id='section_title_3' class='section_title'><a href='http://themathsproject.co.uk' id='section_link_3'>Remembering everything.</a></span>
<ul>
<li id='exhibit_104' class='exhibit_title'><a href='../against-the-odds/black-swans'>black swans</a>
</li>
<li id='exhibit_72' class='exhibit_title'><a href='../against-the-odds/in-here-it-is-yesterday'>in here it is yesterday </a>
</li>
</ul>
</li>
</ul>
</div>
</div>
When the user is on a specific page, the "a" link which they have clicked should become bold. However, for whatever reason it's not working.
I would greatly appreciate any help,
Regards,
Jack

I am not clear with your question but do you want set active class to menu, so you try the below code
$('#navlist a').click(function(e) {
e.preventDefault(); //prevent the link from being followed
$('#navlist a').removeClass('selected');
$(this).addClass('selected');
});
.nav {
color: green;
}
.selected {
color: red;
}
.san ul li{
float:left;
margin-right: 25px;
}
<script type="text/javascript" src="http://code.jquery.com/jquery-1.7.1.js"></script>
<div class="san">
<ul id="navlist">
<li><a class="nav" href="">Home</a></li>
<li><a class="nav" href="">About Us</a></li>
<li><a class="nav" href="">Services</a></li>
<li><a class="nav" href="">Contact</a></li>
</ul>
</div>

This line gets the page name:
var pgurl = window.location.href.substr(window.location.href
.lastIndexOf("/") + 1);
you need to apply the same logic to each of your links to see if they match:
$("#index li a").each(function() {
var aurl = $(this).attr("href").substr($(this).attr("href")
.lastIndexOf("/")+1);
if (aurl == pgurl || aurl == '')
$(this).addClass("active");
})
Snippet below (tweaked to match as location.href won't match)
$(function() {
//var pgurl = window.location.href.substr(window.location.href
// .lastIndexOf("/") + 1);
var locationhref = "mysite.com/against-the-odds/introduction"
var pgurl = locationhref.substr(locationhref.lastIndexOf("/")+1);
$("#index li a").each(function() {
var aurl = $(this).attr("href").substr($(this).attr("href")
.lastIndexOf("/")+1);
//console.log(aurl)
if (aurl == pgurl || aurl == '')
$(this).addClass("active");
})
});
.active { font-weight:bold;color:yellow;}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id='index'>
<div class='container'>
<div class='top'>
<h1><a href='/' title='The Maths Project'>The Maths Project</a></h1>
</div>
<ul class='section active_section' id='section_2'>
<li><span id='section_title_2' class='section_title'><a href='#' id='section_link_2'>Against the odds.</a></span>
<ul>
<li id='exhibit_106' class='exhibit_title'> → Introduction
</li>
<li id='exhibit_83' class='exhibit_title'><a href='../against-the-odds/deriving-functions'> → Deriving functions</a>
</li>
<li id='exhibit_83' class='exhibit_title'><a href='../against-the-odds/exploiting-odds'> → Exploiting odds</a>
</li>
</ul>
</li>
</ul>
<ul class='section' id='section_3'>
<li><span id='section_title_3' class='section_title'><a href='http://themathsproject.co.uk' id='section_link_3'>Remembering everything.</a></span>
<ul>
<li id='exhibit_104' class='exhibit_title'><a href='../against-the-odds/black-swans'>black swans</a>
</li>
<li id='exhibit_72' class='exhibit_title'><a href='../against-the-odds/in-here-it-is-yesterday'>in here it is yesterday </a>
</li>
</ul>
</li>
</ul>
</div>
</div>

Try following and check if it works.
$(function() {
var pgurl = window.location.href.substr(window.location.href.lastIndexOf("/") + 1);
$("#index li a").each(function() {
var href = "";
if($(this).attr("href") != '')
href = $(this).attr("href").substr(($(this).attr("href").lastIndexOf("/")+1);
if (href == pgurl || href == '')
$(this).addClass("active");
})
});

Just traverse the whole links and when any link will clicked then change the font-weight:normal to all links and then apply the font-weight:bold to currently clicked link.
$().ready(function () {
$("ul>li").click(function () {
$("ul>li").css("font-weight", "normal");
$(this).css("font-weight", "bold");
});
});

nested li value on click not working

I have elements which have nested li elements and i made a click function to get the value. Every time i click i am getting the same value again and again.
<script type="text/javascript">
$('.cat-select').on('click',function(){
$('.cat-list').css('display','block');
$('.sub-list').css('display','block');
});
$(document).on('click','.cat-list>li',function(){
var selectedVal = $(this).clone() //clone the element
.children() //select all the children
.remove() //remove all the children
.end() //again go back to selected element
.text(); //get the text of elemen
console.log(selectedVal);
$('.cat-select').text(selectedVal);
});
</script>
<div class="form-group">
<label for="input-placeholder" class="col-sm-2 control-label"></label>
<div class="col-sm-10">
<style type="text/css">
.cat-list, .sub-list{ display: none; }
</style>
<div class="cat-group">
<button class="cat-select" type="button">Select Category</button>
<ul class="cat-list">
<li class="have-child">Electronics
<ul class="sub-list">
<li class="have-child"> Mobiles & Tablets
<ul class="sub-list">
<li>Mobiles</li>
<li>Tablets</li>
<li class="have-child">Accessories</li>
<ul>
<li>Power Bank</li>
<li>Phone Cases</li>
</ul>
</ul>
</li>
<li class="have-child">Cameras
<ul class="sub-list">
<li>DSLRs</li>
<li>Drones</li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
</div>
</div>
Every time i click i am getting the same value
https://jsfiddle.net/yx4Ldt80/

The issue you see is because you only attach the event handler to the child of the .cat-list through your use of the > operator.
To solve this, remove that from the selector and call stopPropagation() on the event to stop it bubbling up the DOM. Try this:
$(document).on('click', '.cat-list li', function(e) {
e.stopPropagation();
var selectedVal = $(this).clone().children().remove().end().text();
$('.cat-select').text(selectedVal);
})
$('.cat-select').on('click', function() {
$('.cat-list, .sub-list').toggle();
});
$(document).on('click', '.cat-list li', function(e) {
e.stopPropagation();
var selectedVal = $(this).clone().children().remove().end().text();
$('.cat-select').text(selectedVal);
})
.cat-list,
.sub-list {
display: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<div class="form-group">
<label for="input-placeholder" class="col-sm-2 control-label"></label>
<div class="col-sm-10">
<div class="cat-group">
<button class="cat-select" type="button">Select Category</button>
<ul class="cat-list">
<li class="have-child">Electronics
<ul class="sub-list">
<li class="have-child">
Mobiles & Tablets
<ul class="sub-list">
<li>Mobiles</li>
<li>Tablets</li>
<li class="have-child">Accessories
<ul>
<li>Power Bank</li>
<li>Phone Cases</li>
</ul>
</li>
</ul>
</li>
<li class="have-child">
Cameras
<ul class="sub-list">
<li>DSLRs</li>
<li>Drones</li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
</div>
</div>
Also note that I fixed the HTML in your 'Accessories' ul as it was outside of the parent li.

"Never use" Event.stopPropagation()
The worst thing you can do (as suggested by answers here and around the web) is to use Event.stopPropagation().
Don't use Event.stopPropagation(), well, unless you really know what you're doing.
An Application should be always aware of every event happening in it's context.
Imagine you build a popup, modal, or a custom select-box that needs to close if you click anywhere else in the page. Well, congratulations, a LI element just stopped you from doing so.
Use Event.target instead
function myClickHandler(ev) {
if (ev.target !== this) return; // Ignore if non-this called the event
console.log( this.textContent );
}
Here's an example with your specific use-case:
const $cat = $('.cat-select');
$cat.on('click', function() {
$('.cat-list, .sub-list').toggle();
});
$(document).on('click', '.cat-list li', function(ev) {
if (ev.target !== this) return; // Ignore if non-this called the event
const value = $(this).contents().filter((i, el) => el.nodeType == 3)[0].nodeValue;
$cat.text(value);
});
// Than, 3000 lines later... THANK YOU BECAUSE:
$('body').on('click', function() {
// Close a popup or something
console.clear(); console.log(`YEY I registered an event!
Thank you for not using Event.preventDefault()`);
});
.cat-list,
.sub-list {
display: none;
}
<div class="form-group">
<label for="input-placeholder" class="col-sm-2 control-label"></label>
<div class="col-sm-10">
<div class="cat-group">
<button class="cat-select" type="button">Select Category</button>
<ul class="cat-list">
<li class="have-child">Electronics
<ul class="sub-list">
<li class="have-child"> Mobiles & Tablets
<ul class="sub-list">
<li>Mobiles</li>
<li>Tablets</li>
<li class="have-child">Accessories</li>
<ul>
<li>Power Bank</li>
<li>Phone Cases</li>
</ul>
</ul>
</li>
<li class="have-child">Cameras
<ul class="sub-list">
<li>DSLRs</li>
<li>Drones</li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
</div>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

Get the clicked element based the event.target property. Although you can avoid the clone by contents() and filter() methods which help to filter out text nodes.
$(document).on('click', 'li', function(e) {
// if target element is not `li` tag then get closest li tag
var selectedVal = (e.target.nodeType == 'LI' ? $(e.target) : $(e.target).closest('li'))
.contents() // get all children nodes
.filter(function() { // filter out text nodes
return this.nodeType === 3;
}).text(); // get text content
$('.cat-select').text(selectedVal);
})
$(document).on('click', 'li', function(e) {
// if target element is not `li` tag then get closest li tag
var selectedVal = (e.target.nodeType == 'LI' ? $(e.target) : $(e.target).closest('li'))
.contents() // get all children nodes
.filter(function() { // filter out text nodes
return this.nodeType === 3;
}).text(); // get text content
$('.cat-select').text(selectedVal);
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="form-group">
<label for="input-placeholder" class="col-sm-2 control-label"></label>
<div class="col-sm-10">
<div class="cat-group">
<button class="cat-select" type="button">
Select Category</button>
<ul class="cat-list">
<li class="have-child">Electronics
<ul class="sub-list">
<li class="have-child">Mobiles & Tablets
<ul class="sub-list">
<li>Mobiles</li>
<li>Tablets</li>
<li class="have-child">Accessories</li>
<ul>
<li>Power Bank</li>
<li>Phone Cases</li>
</ul>
</ul>
</li>
<li class="have-child">Cameras
<ul class="sub-list">
<li>DSLRs</li>
<li>Drones</li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
</div>

i hope this one is helping u
$('.cat-select').each(function() {
$(this).on('click', function() {
$('.cat-list').css('display', 'block');
$('.sub-list').css('display', 'block');
});
});
$(document).on('click', function() {
$(this).each('.cat-list li', function() {
var selectedVal = $(this).clone() //clone the element
.children() //select all the children
.remove() //remove all the children
.end() //again go back to selected element
.text(); //get the text of elemen
console.log(selectedVal);
$('.cat-select').text(selectedVal);
});
});

Add active/selected state to link when click

I have a list of links i would like to add css class of "active" to, to show what is being displayed ie styled different
Fiddle:http://jsfiddle.net/zangief007/rj8g0yh4/7/
HTML:
<ul class="filter-desk" id="selectMe-desk">
<li class="category-1"><a class="active" href="#" data-page="category-1">Partners</a></li>
<li class="category-2"><a class="" href="#" data-page="category-2">Consultants</a></li>
<li class="category-3"><a class="" href="#" data-page="category-3">PA's</a></li>
</ul>
<ul class="category-1 group">
<li class="name">JOHN Smithe QC</li>
<li class="call">DDI <span>09 333 45335</span></li>
<li class="call">MOB <span>027 545 69873</span></li>
<li>david.heaney#heaneypartners.com</li>
</ul>
<ul class="category-3 group">
<li class="name">Barry White</li>
<li class="call">DDI <span>021 487 5896</span></li>
<li class="call">MOB <span>024 387 9854</span></li>
<li>susan.thodey#heaneypartners.com</li>
</ul>
<ul class="category-2 group">
<li class="name">Peter Pan</li>
<li class="call">DDI <span>231234</span></li>
<li class="call">MOB <span>234234</span></li>
<li>23423423423</li>
</ul>
JS:
$(function() {
var curPage = "";
$('.group').hide();
$('.category-1').show();
$("#selectMe-desk li a").click(function() {
var $a = $(this);
curPage = $a.data("page");
$(".group").hide().filter("."+curPage).show();
});
});
CSS
.active{
color:red;}

You have it almost working just add the lines in below see the fiddle
http://jsfiddle.net/rj8g0yh4/9/
$(function() {
var curPage = "";
$('.group').hide();
$('.category-1').show();
$("#selectMe-desk li a").click(function(e) {
var $a = $(this);
// hide currently active
$(".filter-desk .active").removeClass("active");
// make this one active
$a.addClass("active");
curPage = $a.data("page");
$(".group").hide().filter("."+curPage).show();
});
});