Posted in javascript
9042
1:32 am, January 13, 2021
 

checking the current url and then marking a link active based on that url

i want a script that can check the current page uri and then match it to a list of links to be able to add an active class that survives page reloading

So here we go...

1. Get the current page url.

Using this example. get the current url in javascript

2. Get all the nav elements

Need to load all the nav elements into an array and then check if they have the current url

 

HTML

<div class='test-nav'>
<ul class="test-nav-ul" id="test-nav-ul">
<li class="testnavlink"><a href="https://kruxor.com/view/content/MrXNv/kruxor-moving-from-bootstrap-to-css-grid/">Link One</a></li>
<li class="testnavlink"><a href="https://kruxor.com/view/code/lWhoL/badge-border-colour-is-too-dark-or-light-on-number-badges-fixed/">Link Two</a></li>
<li class="testnavlink"><a href="https://kruxor.com/view/code/L8XP1/">Link Three (alternate link for this page)</a></li>
<li class="testnavlink"><a href="https://kruxor.com/view/code/L8XP1/checking-the-current-url-and-then-marking-a-link-active-based-on-that-url/">checking the current url and then marking a link active based on that url</a></li>
<li class="testnavlink"><a href="https://kruxor.com/view/code/WSQr2/using-gzdeflate-on-a-string-php/">Link Four</a></li>
</ul>
</div>

CSS

.testnavlink .active {
  font-weight:bold;
  color:#F00;
}

Javascript

window.onload = function() { 
    var all_links = document.getElementById("test-nav-ul").getElementsByTagName("a"),
        i=0, len=all_links.length,
        full_path = location.href.split('#')[0]; //Ignore hashes?

    // Loop through each link.
    for(; i<len; i++) {
        if(all_links[i].href.split("#")[0] == full_path) {
            all_links[i].className += " active";
        }
    }
}

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