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Add external link to an <a> element inside a Click Event Listener Div

I'm having trouble adding a link to a button inside a card. the card is wrapped in a div element which when clicked automatically expands and closes.
Is there anyway to remove this functionality just when clicking on the details button? So it acts as a normal link?
Here is the code:
https://codepen.io/candroo/pen/wKEwRL
Card HTML:
<div class="card">
<div class="card__image-holder">
<img
class="card__image"
src="https://source.unsplash.com/300x225/?wave"
alt="wave"
/>
</div>
<div class="card-title">
<a href="#" class="toggle-info btn">
<span class="left"></span>
<span class="right"></span>
</a>
<h2>
Card title
<small>Image from unsplash.com</small>
</h2>
</div>
<div class="card-flap flap1">
<div class="card-description">
This grid is an attempt to make something nice that works on touch
devices. Ignoring hover states when they're not available etc.
</div>
<div class="card-flap flap2">
<div class="card-actions">
Read more
</div>
</div>
</div>
</div>
JS:
$(document).ready(function () {
var zindex = 10;
$("div.card").click(function (e) {
e.preventDefault();
var isShowing = false;
if ($(this).hasClass("show")) {
isShowing = true;
}
if ($("div.cards").hasClass("showing")) {
// a card is already in view
$("div.card.show").removeClass("show");
if (isShowing) {
// this card was showing - reset the grid
$("div.cards").removeClass("showing");
} else {
// this card isn't showing - get in with it
$(this).css({ zIndex: zindex }).addClass("show");
}
zindex++;
} else {
// no cards in view
$("div.cards").addClass("showing");
$(this).css({ zIndex: zindex }).addClass("show");
zindex++;
}
});
});

You can check the target of the event and see if it is an <a> using is()
Something like:
$("div.card").click(function (e) {
// only run when not an `<a>`
if(!$(e.target).is('a')){
e.preventDefault();
//the rest of your code
....
}
});

I don't know Jquery but with javascript you can do this inside your code:
const links = document.querySelectorAll('.btn');
links.forEach(link => link.addEventListener('click', (e)=>e.stopPropagation()))

Collapse Side-nav on click responsive

I adjust a bougth onepage-template for my wishes, but unfortunately I'm not good in JS.
So, I have a side menu, which stays in desktop version. But on mobile/tablet-version I have a toggle menu icon. On click the menu opens, but when I click on a navigation-point the menu stays open. I would like to have it closed after clicking.
Thanks for your help
<aside class="nav_sidebar">
<div class="menu_wrapper">
<div class="header_top">
<div class="head_img_wrap">
<img src="images/logo.svg" alt="Images">
</div>
</div>
<div class="main_menu">
<ul>
<li class="active"><p>Home</p></li>
<li><p>Über mich</p></li>
<li><p>services</p></li>
<li><p>portfolio</p></li>
<li><p>blog</p></li>
<li><p>kontakt</p></li>
</ul>
</div>
</div>
</aside><!-- end header -->
<!-- menu toggler -->
<div class="menu_toggler">
<span class="fa fa-bars" aria-hidden="true"></span>
</div>
<!-- menu toggler -->
// Mobile menu css
var $menu_toggler = $('.menu_toggler'),
$menuSidebar = $('aside.nav_sidebar');
$menu_toggler.on('click',function () {
$(this).toggleClass('open');
$menuSidebar.toggleClass('open');
});
if(windowWidth < 768){$menuSidebar.toggleClass('shrinked');}
// collapsible menu css
$('.toggle_icon span').on('click', function () {
$menuSidebar.toggleClass('collapse');
});

Have you tried something like this?
$menuSidebar.on("mouseup", function() {
$menuSidebar.removeClass('open');
});
When something is clicked in the sidebar, it will trigger the mouseup event

Ok I tried this:
// Mobile menu css
var $menu_toggler = $('.menu_toggler'),
$menuSidebar = $('aside.nav_sidebar');
$menu_toggler.on('click',function () {
$(this).toggleClass('open');
$menuSidebar.toggleClass('open');
});
if(windowWidth < 768){$menuSidebar.toggleClass('shrinked');}
// collapsible menu css
$menuSidebar.on("mouseup", function() {
$menuSidebar.removeClass('open');
});
and it works but the toggle icon stays in the middle after closing. It should go back on the left side. Someone help for this problem?

You are using the open class on both the menu and the button, so:
$menuSidebar.on("mouseup", function() {
$menuSidebar.removeClass("open");
$menu_toggler.removeClass("open");
});

Disable close dropdown after click href

I would like to keep my dropdown opened after a page load. For example if I click on an item(href) into an dropdown, I would like to keep the dropdown opened after the redirection.
I've seen that there is a method jquery named stopPropagation, but it seems that this does not work for me
HTML
<div class="sidenav">
<div class="item_sn">
Groups
</div>
<div class="item_list_body">
<div class="link_sidenav">
<a href="#" class="sub_item">
group 1
</a>
</div>
<div class="link_sidenav">
<a href="#" class="sub_item">
group 2
</a>
</div>
</div>
<div class="item_sn">
Users
</div>
<div class="item_list_body">
<div class="link_sidenav">
<a href="#" class="sub_item">
user 1
</a>
</div>
<div class="link_sidenav">
<a href="#" class="sub_item">
user 2
</a>
</div>
</div>
</div>
JQuery
<script>
$(document).ready(function () {
$('.item_list_body').hide();
$('.item_sn').on('click', function (event) {
var content = $(this).next('.item_list_body')
content.slideToggle();
$('.item_list_body').not(content).slideUp();
});
});
</script>
Solution 1 (not working) :
$(document).on('click', '.sub_item', function (e) {
$(this).parent('.link_sidenav').parent('.item_list_body').toggle();
});

you can use sessionStorage to store the state of the menu and then open the menu on page load by checking the state see below
EDIT
rather than using state of the menu we should save the index of the clicked menu as discussed in the comment so updated my answer
$(document).ready(function () {
//sessionStorage.removeItem('opened');
$('.item_list_body').hide();
if (sessionStorage.getItem('opened') !== null) {
$('.sidenav>div:eq(' + sessionStorage.getItem('opened') + ')').next('.item_list_body').show();
}
$('.item_sn').on('click', function (event) {
var content = $(this).next('.item_list_body');
var elem = $(this);
content.slideDown(0, function () {
sessionStorage.setItem('opened', elem.index());
});
$('.item_list_body').not(content).slideUp();
});
});
Hope it helps

Highlight Active/Selected link with jQuery/Javascript

I m using this menu in my site
<div class="q-nav-bar">
<div class="q-nav-bar-item">Home Page</div>
<div class="q-nav-bar-item">Link 1</div>
<div class="q-nav-bar-item">Link 2</div>
</div>
and this code to highlight the selected links:
$(function(){
$(\'.q-nav-bar-item a\').each(function(){
if ($(this).prop(\'href\') == window.location.href) {
$(this).addClass(\'selected\');
$(this).parents(\'a\').addClass(\'selected\');
}
});
});
It works OK but how can i apply the "selected" rule to the home link by default every time a new quest visit my page ?

var $link = $('a');
$link.on('click', function(event) {
event.preventDefault(); // stop normal link function (#)
$link.removeClass('active');
$(this).addClass('active');
});
$('.default').trigger('click');
.active {
color: red;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<a href="#" class='default'>Link #1</a>
Link #2

Change <button> text if element is :hidden or :visible

I have a button that toggles the playlistHolder div. In addition, when '.albumImage a' is selected, it also unhides the playlist. I am trying to change the text of the button to 'Show Playlist' if the playlist is hidden and 'Hide Playlist' if it is not hidden. I have tried click functions with if(('.playlist').is(:hidden)) but have not had any luck with getting it to work. I am new to Jquery so I understand that my code below can use much improvement, here is my setup now that works when the album image is selected as well as when the toggle button is selected without changing the text:
HTML
<div class="togglePlaylist">
<button id="togglePlaylistBT">Show/Hide Playlist</button>
<!-- POPUP LAUNCHER -->
</div>
<div class="playlistHolder">
<div class="componentPlaylist">
<div class="playlist_inner">
<!-- playlist items are appended here! -->
</div>
</div>
<!-- preloader -->
<div class="preloader"></div>
</div>
<div class="albumWrapper">
<div class="albumCovers">
<div class="albumImage"> <img class="img-responsive" src="media/music/Album_Covers/Swag_Brothers.jpg" alt="thumb" />
<p class="nowPlaying">Now Playing</p>
</div>
</div>
</div>
Javascript/JQuery
$('#togglePlaylistBT, .albumImage a').on('click', function() {
var $this = $('#togglePlaylistBT');
if($('.playlistHolder').is(':visible'))
{
$('.playlistHolder').hide('slow');
$this.text('Hide Playlist');
}
else
{
$('.playlistHolder').show('slow');
$this.text('Show Playlist');
}
});

Try this snippet of code:
$('.togglePlaylist button').on('click', function() {
var $this = $(this);
if($('.playlistHolder').is(':visible'))
{
$('.playlistHolder').hide();
$this.text('Hide Playlist');
}
else
{
$('.playlistHolder').show();
$this.text('Show Playlist');
}
});
Working JSFiddle

When you hide and show the playlist just run document.getElementById("togglePlaylistBT").value="Show Playlist";
For example:
function change()
{
var elem = document.getElementById("playlistButton");
if (elem.value=="Open Playlist") { elem.value = "Close Playlist"; closeBox(); }
else { elem.value = "Open Playlist"; openBox(); }
}
function openBox() {
alert("open");
}
function closeBox() {
alert("closed");
}
<input onclick="change()" type="button" value="Open Playlist" id="playlistButton"></input>
Make sure to change openBox() and closeBox() functions to your box code!