JSFiddle - React, Tailwind, and code Playground

by Renish A R

HTML

<input type="text" class="quiztxtBox" /><span></span><br/><br/>
<input type="text" class="quiztxtBox" /><span></span><br/><br/>
<input type="text" class="quiztxtBox" /><span></span><br/><br/>
<input type="text" class="quiztxtBox" /><span></span><br/><br/>

JavaScript

$(".quiztxtBox").keyup(function(e){

    $(".quiztxtBox").each(function()
    {
        if($(this).val()=="")
        {
             $(this).nextAll('span').html("Field needs filling");
             $(this).css({"background-color":"#f6d9d4"});
        }
        else
        {
            $(this).nextAll('span').html("");
            $(this).css({"background-color":"#fff"});
        }
    });
    
});