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If you are using menus on your web designs it's a common web design technique to highlight the current page that you are on to show you where you are on the site.

This technique is normally done by adding a CSS class to the menu item to highlight it differently to the other menu items.

If your using a WordPress site then you are most likely using the WordPress function wp_nav_menu() to display the menu items. In wordpress this function will automatically add a CSS class of current_page_item to the current page. But if your using a static website then you will need to add this CSS class on every page of your site, if there are a lot of pages on your site then this can take up a lot of time.

Here is a jQuery snippet which will check the current page URL and compare it with the URLs in the menu and if they match it will add a class to the menu item.

<script type="text/javascript">
        // Get current url
        // Select an a element that has the matching href and apply a class of 'active'. Also prepend a - to the content of the link
        var url = window.location.href;
        $('.menu a[href="'+url+'"]').addClass('current_page_item');

The above solution will only work for absolute URLs, which will not work on every website if they use relative URLs.

@micha149 has shown me this jQuery snippet which will catch all absolute and relative URLs.

var url = window.location.href;

// Will only work if string in href matches with location
$('.menu a[href="'+ url +'"]').addClass('active');

// Will also work for relative and absolute hrefs
$('.menu a').filter(function() {
    return this.href == url;
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