JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <input type="hidden" value="abcnew" id="abc_lkid">
    <input type="hidden" value="abcold" id="abc_lkold">
<span>
<input type="text" id ="abc">
</span>

</div>

JavaScript

var a = [];
$("#abc").change( function() {
    $('div').find('input[type=hidden]').each(function(index){
        a.push($(this).val());
    });
         
    
console.log(a);
});