JSFiddle - React, Tailwind, and code Playground

HTML

<input id="firstInput" type="text"/>
<textarea id="txtarea" rows="20" cols="60"></textarea>

JavaScript

$(document).ready(function(){ 
    var inputElement = $("input");
    var area = $("textarea");
    
    inputElement.on({
        focusin : function(ev){ 
            area.val(area.val()+"focusin("+$(this).attr("id")+") ");
        },
        focusout : function(ev){  
            area.val(area.val()+"focusout("+$(this).attr("id")+") ");
        }
    });
});