[FIXED] Trying to reload DIV content after class change

Issue

I am trying to create a script that when a button is clicked it changes the class of a DIV and then reloads the content of that DIV.

So far I have created a script that successfully changes the class of the DIV.

document.addEventListener("DOMContentLoaded", function (event) {
  jQuery("#button").click(function () {
    document.getElementById("id").className = "newClass";
  });
}); 

but I still need it to reload the content of the DIV with the new class. I have looked around for a solution and found the following code that I have tried to add:

$("#id").load(window.location.href + " #id");

But gives me the following error:

(index):470 Uncaught TypeError: $ is not a function

What am I doing wrong here?

Solution

In plain jQuery you would use:

jQuery(function($) { // DOM is now ready and jQuery's $ alias sandboxed

    $("#button").on("click", function () {
        $("#id")
          .addClass("newClass")
          .load(window.location.href + " #id");
    });

});

but I'm not sure why would you use the same location.href - and how is that correlated to any "content refreshing".
Also, by doing the above you'll get yourself duplicated #id elements, one inside the other:

_{Initial state:}

<div id="id">Test test test</div>

_{After clicking the "Button" one or more times:}

<div id="id" class="newClass">
  <div id="id">Test test test</div>
</div>

which is clearly not something you'd want.

Answered By - Roko C. Buljan