I'm trying to add an active class (i.e. class="active") to the appropriate menu list item based upon the page it is on once the page loads. Below is my menu as it stands right now. I've tried every snippet of code I could find in this regard and nothing works. So, can someone please explain simply where and how to add in javascript to define this task?

<ul id="nav">
    <li id="navhome"><a href="home.aspx">Home</a></li>
    <li id="navmanage"><a href="manageIS.aspx">Manage</a></li>
    <li id="navdocso"><a href="docs.aspx">Documents</a></li>
    <li id="navadmin"><a href="admin.aspx">Admin Panel</a></li>
    <li id="navpast"><a href="past.aspx">View Past</a></li>
</ul>

Here is an example of the javascript that I'm putting in my head tag in my site master. What am I doing wrong?

$(document).ready(function () {
    $(function () {
        $('li a').click(function (e) {
            e.preventDefault();
            $('a').removeClass('active');
            $(this).addClass('active');
        });
    });
});

Solution 1

The reason this isn't working is because the javascript is executing, then the page is reloading which nullifies the 'active' class. What you probably want to do is something like:

$(function(){
    var current = location.pathname;
    $('#nav li a').each(function(){
        var $this = $(this);
        // if the current path is like this link, make it active
        if($this.attr('href').indexOf(current) !== -1){
            $this.addClass('active');
        }
    })
})

There are some cases in which this won't work (multiple similarly pointed links), but I think this could work for you.

Solution 2

    jQuery(function($) {
     var path = window.location.href; // because the 'href' property of the DOM element is the absolute path
     $('ul a').each(function() {
      if (this.href === path) {
       $(this).addClass('active');
      }
     });
    });
.active, a.active {
    color: red;
}
a {
    color: #337ab7;
    text-decoration: none;
}
li{
    list-style:none;
}
<h3>Add Active Navigation Class to Menu Item</h3> 

    <ul>
     <li><a href="/">Home</a></li>
     <li><a href="/about/">About</a></li>
    </ul> 

<h2><a href="http://www.sweet-web-design.com/examples/active-item/active-class.html">Live Demo</a></h2>

Solution 3

With VANILLA plain JavaScript

(function () {
    var current = location.pathname.split('/')[1];
    if (current === "") return;
    var menuItems = document.querySelectorAll('.menu-item a');
    for (var i = 0, len = menuItems.length; i < len; i++) {
        if (menuItems[i].getAttribute("href").indexOf(current) !== -1) {
            menuItems[i].className += "is-active";
        }
    }
})();

Solution 4

ES6 version, that works properly in cases when your link is to "/products" and you have subroutes, like: "/products/new", "/products/edit", etc.

let switchNavMenuItem = (menuItems) => {

    var current = location.pathname

    $.each(menuItems, (index, item) => {

        $(item).removeClass('active')

        if ((current.includes($(item).attr('href')) && $(item).attr('href') !== "/") || ($(item).attr('href') === "/" && current === "/")){
            $(item).addClass('active')
        }
    })
}

$(document).ready(() => {   
    switchNavMenuItem($('#nav li a, #nav li link'))
})

Solution 5

If your menu need add the active class in li, you need use this code above.

$(function($) {
  let url = window.location.href;
  $('nav ul li a').each(function() {
    if (this.href === url) {
      $(this).closest('li').addClass('active');
    }
  });
});

Solution 6

$(function() {
    var CurrentUrl= document.URL;
    var CurrentUrlEnd = CurrentUrl.split('/').filter(Boolean).pop();

    $( ".top-menu li a" ).each(function() {
          var ThisUrl = $(this).attr('href');
            var ThisUrlEnd = ThisUrl.split('/').filter(Boolean).pop();
            if(ThisUrlEnd == CurrentUrlEnd)
            $(this).addClass('active')
        });
    });

Solution 7

This on page JS code is a 100% working put your id and enjoy it.

   <script src="https://code.jquery.com/jquery-3.3.1.js"></script>
   <script>
   $(document).ready(function() {

            var CurrentUrl= document.URL;
            var CurrentUrlEnd = CurrentUrl.split('/').filter(Boolean).pop();
            console.log(CurrentUrlEnd);
            $( "#lu-ID li a" ).each(function() {
                  var ThisUrl = $(this).attr('href');
                  var ThisUrlEnd = ThisUrl.split('/').filter(Boolean).pop();

                  if(ThisUrlEnd == CurrentUrlEnd){
                  $(this).closest('li').addClass('active')
                  }
            });

   });

Solution 8

None of the above solutions worked for me. Finally this javascript solution worked.

<script>
function setActive() {
  linkObj = document.getElementById('premier-topnav').getElementsByTagName('a');
  for(i=0;i<linkObj.length;i++) { 
    if(document.location.href.indexOf(linkObj[i].href)>=0) {
      linkObj[i].classList.add("active");
    }
  }
}

window.onload = setActive;
</script>    

premier-topnav is the id of navbar div.
.active class is defined as:

#premier-topnav .active {
    color: brown;   
}

Solution 9

var cururl = window.location.pathname;
var curpage = cururl.substr(cururl.lastIndexOf('/') + 1);
var hash = window.location.hash.substr(1);
if((curpage == "" || curpage == "/" || curpage == "admin") && hash=="")
{
//$("nav .navbar-nav > li:first-child").addClass("active");
}
else
{
$(".topmenu li").each(function()
{
    $(this).removeClass("active");
});
if(hash != "")
$(".topmenu li a[href*='"+hash+"']").parents("li").addClass("active");
else
$(".topmenu li a[href*='"+curpage+"']").parents("li").addClass("active");
}

Solution 10

Rob.M got it right.

I'm just going to post my solution since his didn't really work for me. i have a small change in comparison to him. assuming you have different paths to each link.

(function() {
    var current = location.pathname;
    $('#navbar ul li a').each(function() {
        var $this = $(this); 

        // we check comparison between current page and attribute redirection.
        if ($this.attr('href') === current) {
            $this.addClass('active');
        }
    });
})();

Solution 11

This worked perfectly for me.

$(function($) {
 let url = window.location.href;
  $('nav ul li a').each(function() {
   if (this.href === url) {
   $(this).addClass('active');
  }
 });
});

Solution 12

I know it been quite a while this question was asked. Here is the answer which will work without jQuery:

var activeNavlink = document.querySelectorAll('nav a[href^="/' + location.pathname.split("/")[1] + '"]');
activeNavlink[0].classList.add('active');

Hope this helps.

Solution 13

If you want for master page in asp .net just put this code inside body tag

 <script type="text/javascript">
    jQuery(function ($) {
        var path = window.location.href; // because the 'href' property of the DOM element is the absolute path
        $('ul a').each(function () {
            if (this.href === path) {
                $(this).addClass('active');
            }
        });
    });
</script>

Thank you

Solution 14

This should do your job in one liner.

document.querySelector(`a[href^='${location.pathname.split('/'[1])}']`).className = 'active'

Solution 15

jQuery style:

$('a[href="'+ window.location.href + '"]').css({
  backgroundColor: 'red',
  color: 'white'
})

In first line use this if you have relative links

$('a[href="'+ window.location.path + '"]').css({

Or both

$('a[href="'+ window.location.href + '"], a[href="'+ window.location.path + '"]').css({

Solution 16

$(function(){

//this returns the whole url

  var current = window.location.href;

  //this identifies the list you are targeting

  $('#nav li a').each(function(){
    var $this = $(this);

    // if the current path is exactly like this link, make it active

    if($this.attr('href') === current){

    //this takes care of ul inside a ul, it opens and make active the selected li
        $this.parents('.dropdown-menu').toggle();
        $this.css('color', 'red');
    }
  })
});

Solution 17

The bellow jquery script will match the manu if the page has any query string parameter as well. This script is helpful for links with nearly same name.

<script>
        //select current menu Item
        $(function () {
            var current = location.pathname.toLocaleLowerCase();
            $('.sidebar li a').each(function () {
                var $this = $(this);
                var href = $this.attr('href');
                href = href.replace(/\?.*/, "").toLocaleLowerCase();
                // if the current path is equal to this link, make it active
                if (href === current) {
                    $this.addClass('active');
                }
            })
        })
    </script>

Solution 18

Accessible Version:

Here's an accessible version inspired by rob.

  1. I didn't want to run this script on the homepage so I check if it's the homepage
  2. I check if the link matches the exact page instead of checking if it's included in the path. Or else you would get multiple items in the query.

JS

function activateCurrentPage(menuItems){
    var current = location.pathname;
    if (current !== "/") {
    menuItems.each(function(){
        var $this = $(this);
        if($this.attr('href') === current){
            $this.addClass('active');
            $this.attr('aria-current', 'page');
        }
    });
    };  
}

activateCurrentPage( $('#nav li a') );  

CSS

Then for CSS don't target the active class instead target the aria attribute.

#nav a[aria-current="page"]{
   color:red;
}

Solution 19

Saw somethng wth plain Javascript https://www.youtube.com/watch?v=BI3kNsTruWo&ab_channel=OnlineTutorials Put it in <script> tags after header in my Wordpress site

Solution 20

i was having troubles where the link to the root would light up if any page was selected when using Networker's example. this will prevent that for the root pae:

function setActive() {
  linkObj = document.getElementById('menu').getElementsByTagName('a');
  for(i=0;i<linkObj.length;i++) { 
    const url = new URL(window.location.href);
    if((document.location.href.indexOf(linkObj[i].href)>=0 && linkObj[i].href != url.protocol+"//"+url.hostname+"/") || document.location.href == linkObj[i].href) {
      linkObj[i].classList.add("active");
    }
  }
}
window.onload = setActive;

Solution 21

This Does the Job Done For me... Put this before the ending of body tag

 $(function () {
        var current = location.pathname;
        console.log(current);
        if (current == "/") {
            $('#home').addClass('active'); //#home is the id for root link.
        }
        else {

            $('#navbarCollapse div a').each(function () {
                var $this = $(this);
                // if the current path is like this link, make it active
                if ($this.attr('href').indexOf(current) !== -1) {
                    $this.addClass('active');
                }
            })
        }
    })

Solution 22

Classes can make the life a whole way easier.

css

<nav>
    <ul class="nav-list">
        <li class="nav-list-item"><a class="nav-link nav-link-active" href="index.html">Home</a></li>
        <li class="nav-list-item"><a  class="nav-link" href="about.html">About Me</a></li>
        <li class="nav-list-item"><a  class="nav-link" href="posts.html">Recent Posts</a></li>
    </ul>
</nav>

js

(function() {
    current_page = window.location.href;
    navlinks = document.getElementsByClassName("nav-link");
    active_page = document.getElementsByClassName("nav-link-active")[0];
    if (active_page) {
        active_page.classList.remove("nav-link-active");
    }

    for (i=0; i < navlinks.length; i++) {
        if (navlinks[i].href == current_page) {
            navlinks[i].classList.add("nav-link-active");
            break;
        }
    }
})();

Solution 23

I know this is late answer but this works ok for me

var links = document.querySelectorAll('li a');

for (link of links) {
    if (window.location.pathname == link.getAttribute('href')) {
        link.classList.add('active')
    } else {
        link.classList.remove('active')
    }
}

Solution 24

Below is the solution to add the dynamic active class to the navbar elements.

// first lets get all the navbar elements.
const navElements = document.querySelectorAll(".list");
// creating a function of active navbar item 
const activeLink = (el) => {
        list.forEach((item) => {
         item.classList.remove("active");
         el.classList.add("active");
    });
 };


// attaching the event listener for each element
list.forEach((item) => {
    item.addEventListener("click", () => {
       activeLink(item)
    });
 });