JSFiddle - React, Tailwind, and code Playground

HTML

<form id="atas" action="action_page.php">
First name:<br>
<input type="text" value="Mickey">
<br>
Last name:<br>
<input type="text" name="lastname" class="hargaItem" value="$3,600.00">
<br><br>
<input type="text" size="2" name="qty[]" id="text_qty_" class="qtyInput quantityInput" value="1"/>
<input type="submit" value="submbit">
</form> 

<div>
  <span class="harga">$3,600.00</span>
</div>

JavaScript

$(document).ready(function()
{
    $('#atass').on('click', function()
    {
        $('#atass').find('input:text[name=lastname]').val('');
    });
});