Is there any method to get the URL without query string?

Read about Window.location and the Location interface:

const urlPieces = [location.protocol, '//', location.host, location.pathname]
let url = urlPieces.join('')

console.log({urlPieces, url})

location.toString().replace(location.search, "")

var url = window.location.origin + window.location.pathname;

If you also want to remove hash, try this one: window.location.href.split(/[?#]/)[0]

Here's an approach using the URL() interface:

new URL(location.pathname, location.href).href

Try:

document.location.protocol + '//' +
document.location.host +
document.location.pathname;

(NB: .host rather than .hostname so that the port gets included too, if necessary)

just cut the string using split (the easy way):

var myString = "http://localhost/dms/mduserSecurity/UIL/index.php?menu=true&submenu=true&pcode=1235"
var mySplitResult = myString.split("?");
alert(mySplitResult[0]);

To get every part of the URL except for the query:

var url = (location.origin).concat(location.pathname).concat(location.hash);

Note that this includes the hash as well, if there is one (I'm aware there's no hash in your example URL, but I included that aspect for completeness). To eliminate the hash, simply exclude .concat(location.hash).

It's better practice to use concat to join Javascript strings together (rather than +): in some situations it avoids problems such as type confusion.

What I would do in 2023:

const windowUrl = window.location.href;
const { origin, pathname } = new URL(windowUrl);
const urlWithoutQueryOrHash = `${origin}${pathname}`;

You can create instance of URL and then clear the query string:

const url = new URL(document.location.href);
url.search = '';
console.log(url.href);

Use properties of window.location

var loc = window.location;
var withoutQuery = loc.hostname + loc.pathname;
var includingProtocol = loc.protocol + "//" + loc.hostname + loc.pathname;

You can see more properties at https://developer.mozilla.org/en/DOM/window.location

How about this: location.href.slice(0, - ((location.search + location.hash).length))

Here are two methods:

<script type="text/javascript">
    var s="http://localhost/dms/mduserSecurity/UIL/index.php?menu=true&submenu
                                =true&pcode=1235";

    var st=s.substring(0, s.indexOf("?"));

    alert(st);

    alert(s.replace(/\?.*/,''));
</script>

You could make use of the URL constructor like this:

const href = 'http://localhost/dms/mduserSecurity/UIL/index.php?menu=true&submenu=true&pcode=1235'; // document.location.href
const url = new URL(href);
const noSearchUrl = href.replace(url.search, '');
console.log(noSearchUrl);

Just add these two lines to $(document).ready in JS as follow:

$(document).ready(function () {
 $("div.sidebar nav a").removeClass("active");
        $('nav a[href$="'+ window.location.pathname.split("?")[0] +'"]').addClass('active');
});

it is better to use the dollar sign ($) (End with)

$('nav a[href$

instead of (^) (Start with)

$('nav a[href^

because, if you use the (^) sign and you have nested URLs in the navigation menu, (e.g "/account" and "/account/roles")

It will active both of them.

window.location.href.split("#")[0].split("?")[0]

If you are using navigation bar and want to get the pure url after clicking on the side bar navigation, then the following code might be helpful:

$(document).ready(function () {
    $("div.sidebar nav a").removeClass("active");
    var urlPath = window.location.pathname.split("?")[0];
    var nav = $('div.sidebar nav a').filter(function () {
        return $(this).attr('href').toLowerCase().indexOf(urlPath.toLocaleLowerCase()) > -1;
    });
    $(nav).each(function () {
        if ($(this).attr("href").toLowerCase() == urlPath.toLocaleLowerCase())
            $(this).addClass('active');
    });
});