JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" id="ww" accountName="12345"/>
<input type="button" id="clickbutton" value="b"/>

JavaScript

$(docuement).ready(function()
{
    $("input:checkbox[checked]").each(function () {
     alert($(this).attr("accountName"));
    }    
   )    
});