JSFiddle - React, Tailwind, and code Playground

HTML

<input id="txt" type="text" class="dcol" data-toggle="popover" data-content="Required Field with Numeric Input"  style="background-color:#FFFF66" value="">

JavaScript

$("#txt").hover(function(){
    alert("this field will be automatically populated!"); 
     $(this).attr('disabled','disabled');     
});