Implementation of the comment writing function

You can use AJAX. Below is a simple example.

<div id="comment">
    This is also about the story...
    <a href="#"onclick="reply_load()">View replies</a>
</div>
<div id="reply">
    <!-- Reply loaded here -->
</div>

I organized the comments into a simple markup

#comment is the comment part, and #reply is the place to retrieve the reply later

When you open the page, just bring the comments to #comment and leave them without anything in #reply

Pressing the tag here for reply view a causes an onclick event and executes the reply_load() function

function reply_load() {
    // Get reply from server using ajax
    $("#reply").append (processed and added the imported data to look good);
}

The reply_load function is described like this.

You need to make a part where you can get comments from the server

The value to be received in the part where you get the reply of the comment must be the unique number (id) of the comment stored in the DB. You can organize the query with that

I can't write down an example of the query because I don't know what the column is like now.

Anyway, you have to bring it and add it to #reply

The key keyword is jquery ajax. If you search on Google, you'll get a lot of examples.