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How to add active class on specific li on user click after page load using JavaScript

I have a menu with certain items and I want when a user clicks on any li than only its class becomes an active class. I have menu items like the following:
$(document).ready(function () {
$(function () {
var pgurl = window.location.href.substr(window.location.href.lastIndexOf("/") + 1);
alert(pgurl);
$(".nav li a").each(function () {
if ($(this).attr("href") == pgurl || $(this).attr("href") == '') {
$(this).addClass("active");
}
})
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="col-sm-9">
<nav class="nav-holder">
<div class="nav-footer">
<ul class="nav" id="navclk">
<li class="active">
Home
</li>
<li class="">
About
</li>
<li class="">
Car Rentals
</li>
<li class="">
Wedding Cars
</li>
<li class="">
Tempo Travellers
</li>
<li class="">
Tour Package
</li>
<li class="">
Coach
</li>
<li class="has-submenu">
Places
<ul class="submenu">
<li>Bhubaneswar</li>
<li>Puri</li>
<li>Konark</li>
<li>Chilika</li>
<li>Gopalpur</li>
<li>Cuttack</li>
<li>Bhitar Kanika</li>
<li>Daringbadi</li>
<li>Jajpur</li>
</ul>
</li>
<li>Contact</li>
</ul>
</div>
</nav>
</div>
It's not working with the drop-down menus while working perfectly with all other menus not having drop-down items. How can I change the code that it works too with menu items having a drop-down list of items? I am also using update panel on my page.

This could be done by the following code
CSS
.active {
/* your active CSS */
}
html
<ul>
<li onclick="activeMe(this)">1</li>
<li onclick="activeMe(this)">2</li>
<li onclick="activeMe(this)">3</li>
<li onclick="activeMe(this)">4</li>
</ul>
JavaScript
function activeMe(li) {
console.log(li.setAttribute("class", "active"));
}
``

Correct Answer!
<!--Menu Active-->
<script type="text/javascript">
$(document).ready(function () {
$('.nav li').removeClass('active');
$(function () {
var pgurl = window.location.href.substr(window.location.href.lastIndexOf("/") + 1);
$(".nav li a").each(function () {
if ($(this).attr("href") == pgurl) {
$(this).closest('li').addClass("active");
}
})
});
});
</script>
<!--Menu Active-->

Make sub nav slidedown and slideup toggle

Here's what I'm trying to do:
Create a navigation with a sub-nav or child page.
When the user clicks on about, I want the about to toggle the Bob li.
It should slide down and slide up when clicked on and off of about.
$(document).ready(function() {
$("#grab").click(function() {
$(".sub-nav").slideToggle();
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul class="nav">
<li id="#grab">About
<ul class="sub-nav">
<li>Bob</li>
</ul>
</li>
<li>Contact</li>
<li>Faqs</li>
</ul>

Your HTML is wrong you have a hashtag before grab id="#grab" it should be id="grab" by default the li contain "Bob" will be show to resolve this issue, add display:none; to the ul either through a class or inline
$(document).ready(function() {
$("#grab").click(function() {
$(".sub-nav").stop().slideToggle();
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul class="nav">
<li id="grab">About
<ul style="display:none" class="sub-nav">
<li >Bob</li>
</ul>
</li>
<li>Contact</li>
<li>Faqs</li>
</ul>

The # is used to reference id, in your tag you're seting the id as #grab, and in your jquery you're setting the .click() event to the class grab.
Then you'll need to change your <li> id to grab:
<li id="grab">
You can add display: none to your <ul>. In that way, when the page load, the sub-nav starts hidden:
You can set this on the tag:
<ul class="sub-nav" style="display: none;">
Or in your css:
.sub-nav{
display: none;
}

toggleclass active doesn't work properly

I want the menu to work like this. When you click Main1 it becomes active and the list will show, when you click it again the list will hide. When Main1 is active and you click Main2, then the Main1 should be inactive and Main2 active.
But my Javascript doesn't seem to make it work well. It makes the Main1 inactive when you click Main2 and the other way, but if you click on any of the active Main it doesn't become incactive. Please help
<div class="directory-section-list">
<ul class="list_item">
<li class="li_lvl lvl0" id="bx_1847241719_2">Main1</li>
<ul>
<li class=""><span class="li_lvl lvl1">1.5-4.5</span>
<ul>
<li>FD 15</li>
<li>FD 18</li>
</ul>
</ul>
<ul class="list_item">
<li class="li_lvl lvl0" id="bx_1847241719_2">Main2</li>
<ul>
<li class=""><span class="li_lvl lvl1">1.5-4.5</span>
<ul>
<li>FD 15</li>
<li>FD 18</li>
</ul>
</ul >
</div>
Javascript
$(' .list_item .lvl0').click(function(){
$(".list_item.active").removeClass("active");
$(this).parent().toggleClass('active');
});
$(' .list_item .lvl1').click(function(){
$(this).parent().toggleClass('active');
});

Try this,
$('.list_item .lvl0').click(function(){
$('.directory-section-list .active').removeClass('active');
if ($(this).parent().hasClass('active'))
{
$(this).parent().removeClass('active');
}
else
{
$(this).parent().addClass('active');
}
});
$('.list_item .lvl1').click(function(){
$(this).parent().toggleClass('active');
});

Please try this
HTML
<div class="directory-section-list">
<ul class="list_item">
<li class="li_lvl lvl0" id="bx_1847241719_2">Main1</li>
<ul>
<li class=""><span class="li_lvl lvl1">1.5-4.5</span>
<ul>
<li>FD 15</li>
<li>FD 18</li>
</ul>
</ul>
</ul>
<ul class="list_item">
<li class="li_lvl lvl1" id="bx_1847241719_2">Main2</li>
<ul>
<li class=""><span class="li_lvl lvl1">1.5-4.5</span>
<ul>
<li>FD 15</li>
<li>FD 18</li>
</ul>
</ul>
</ul>
</div>
Java Script
$(' .list_item .lvl0').click(function () {
$(' .list_item .lvl1').parent().removeClass("active");
$(this).parent().toggleClass('active');
});
$(' .list_item .lvl1').click(function () {
$(' .list_item .lvl0').parent().removeClass("active");
$(this).parent().toggleClass('active');
});

Sorry but your HTML List had a couple of errors the
<li class=""><span class="li_lvl lvl1">1.5-4.5</span>
will never be closed...
its all about the HTML Structure - i've done another change -> check the HTML Structure of this JS Fiddle: http://jsfiddle.net/marco_rensch/hzu76hgt/32/

I think you want something like this?
$(document).ready(function(){
$('.maindiv').hide();
$( "button" ).click(function() {
$('.maindiv[data-link=' + $(this).data('link') + ']').toggle("fade",300);
});
});
div {
background-color: green;
color: white;
width: 200px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<button class="show" data-link="main1">Main1</button>
<button class="show" data-link="main2">Main2</button>
<div>
<div class="maindiv" data-link="main1">
<h1>This is main1</h1>
</div>
<div class="maindiv" data-link="main2">
<h1>This is main2</h1>
</div>
</div>

Well Thank you all for your help. I managed to do it taking some of your examples and making it work my own way. Thank you again. I will post the Javascript fix.
$(document).ready(function() {
$('.li_lvl').click(function () {
if ($(this).parent().hasClass('active')) {
$(this).parent().removeClass('active');
}
else {
$('.directory-section-list .active').removeClass('active');
$(this).parent().addClass('active');
}
});
This will toggle class active of the parent .li_lvl which is the ul.list_item. If parent has class active it will remove class active. If any other list_item will have class active whilst you click on the other list_item, it will remove class active on the other list_item and make class active on the list_item you clicked.

javascript horizontal menu click to open

Trying to make javascript horizontal menu, but can't get second button to open its own items, (when i click the second button it opens the items that are for the first button) here is current code:
JavaScript:
$(document).ready(function() {
$(".menu-button,.menu-button1").click(function() {
$(".menu-bar").toggleClass("open");
});
})
HTML:
<ul class="menu">
<li title="home">menu</li>
<li title="pencil">pencil</li>
<li title="about">about</li>
</ul>
<ul class="menu-bar">
<li>Menu0</li>
<li>Home2000</li>
<li>About</li>
<li>Parent</li>
<li>About</li>
</ul>
<ul class="menu-bar">
<li>Menu1</li>
<li>About</li>
</ul>

Before I start my answer, let me explain jQuery a bit.
$(".menu-button,.menu-button1").click(function() {
$(".menu-bar").toggleClass("open");
});
This broken down:
$(".menu-button,.menu-button1").click(function() { -> When any item with class menu-button OR class menu-button1 is clicked
$(".menu-bar").toggleClass("open"); ->Toggle the "open" class for all elements in your page with class menu-bar.
Since you call all the menus instead of the specific one you want, it opens both of them.
So, be more specific by - for starters - using IDs, or unique/identifying classes:
JS:
$(document).ready(function() {
$(".menu-button.home").click(function() {
$(".menu-bar.home").toggleClass("open");
});
$(".menu-button.pencil").click(function() {
$(".menu-bar.pencil").toggleClass("open");
});
})
HTML:
<ul class="menu">
<li title="home">menu</li>
<li title="pencil">pencil</li>
<li title="about">about</li>
</ul>
<ul class="menu-bar home">
<li>Menu0</li>
<li>Home2000</li>
<li>About</li>
<li>Parent</li>
<li>About</li>
</ul>
<ul class="menu-bar pencil">
<li>Menu1</li>
<li>About</li>
</ul>

I agree with M.Doye's comment about using .each (but sorry, I can't answer directly).
I want to add that, it will be much easier with that kind of HTML structure I think:
<ul class="menu">
<li title="home">
Show Menu 1
<ul class="menu-bar">
<li>Menu1
</li>
</ul>
</li>
<li title="pencil">
Show Menu 2
<ul class="menu-bar">
<li>Menu2
</li>
</ul>
</li>
</ul>
The, click on the link and use .next() or .siblings or closest... to show the right ul.
But of course you'll have to rewrite you CSS :)

Here is updated code
$(document).ready(function () {
$(".menu-button,.menu-button1").click(function () {
$(this).siblings(".menu-bar").toggleClass("open");
})
})
<ul class="menu">
<li title="home">menu
<ul class="menu-bar">
<li>Menu1</li>
<li>About</li>
</ul>
</li>
<li title="pencil">pencil
<ul class="menu-bar">
<li>Menu0</li>
<li>Home2000</li>
<li>About</li>
<li>Parent</li>
<li>About</li>
</ul>
</li>
</ul>
here is a jsfiddle

adding class active to submenu after reloading page

After clicking the li item, i added the active class with js but it leads to the other page and the active class disappears.
I am using bootstap navwalker so don't know how to use php code into it.
<div id="cssmenu" class="right-tabs">
<ul>
<li></li>
<li>
<ul role="menu" class=" dropdown-menu">
<li>link</li>
</ul>
</li>
<li>page</li>
</ul>
</div>
JS
$(document).ready(function(){
$(".dropdown-menu > li").click(function () {
$(this).siblings().removeClass("active");
$(this).addClass("active");
});
});

Could you just add the class based on the url?
Example assuming your on a about page
$(function() {
var loc = window.location.href; // returns the full URL
if(/about/.test(loc)) {
$('.dropdown-menu > li .about').addClass('active');
}
});

in link.php, add active class
<div id="cssmenu" class="right-tabs">
<ul>
<li></li>
<li class="activeClass">
<ul role="menu" class=" dropdown-menu">
<li>link</li>
</ul>
</li>
<li>page</li>
</ul>