The persistence of Jquery addClass is not guaranteed

While developing a web application in Django, I wanted to find a simple way to track the user's location on the site. My solution was to change the CSS of the menu item clicked by the user.

After adding this straightforward piece of code:

 <script type="text/javascript">
$(document).ready(function(){
$(".up_menu_item").click(function(){
$(this).addClass("green");
var excludeThis = $(this);
$(".up_menu_item").not(excludeThis).each(function(){
$(this).removeClass("green");
});
});
});
</script>

Upon clicking a menu item, the color changes momentarily before reverting back to default. The menu items are actually anchor tags that redirect users to other URLs. However, since the menu and JavaScript are always included in the called URLs, I expected the class to persist.

I hope my explanation is clear enough, and any help would be greatly appreciated as this issue is really starting to frustrate me!

Answer №1

Using Javascript for this task may not be the most suitable approach. Kim pointed out in a comment that when you refresh the page, your class will no longer be present.

Since you are working with Django, the best way to achieve this is within the Django template itself - loop through each URL in your menu, check if it matches the current URL, and add the class accordingly.

Additionally, you can extract the current URL using request.path if you have passed the request object into your template (which is automatically done if you have enabled the request context processor).

Answer №2

Perhaps a more efficient approach would be to first remove the class from all elements and then add it to the new element?

$(".up_menu_item").click(function(){
    $($(this).attr('class')).removeClass();
    $(this).addClass("green");
});

Answer №3

After navigating to a different page, any JavaScript or jQuery changes that were applied disappear. The new page loads as usual without the alterations. Only the current displayed page is affected by the changes; subsequent pages remain unaffected.

To determine which page is currently open and adjust the color of the corresponding button accordingly, it is recommended to utilize server-side programming language (such as Python with the Django framework) to dynamically add the necessary class based on the page being accessed.

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