JSFiddle - React, Tailwind, and code Playground

HTML

<input id="amountInput">
<div class="amountMessage">
  Result
</div>

CSS

.show {
  outline: 2px solid red;
}

JavaScript

$(document).ready(function(){
    $("#amountInput").on('keyup', function(){
            if(parseInt(this.value) > 34 && parseInt(this.value) < 50) {
           $(".amountMessage").addClass("show");
       } else {
           $(".amountMessage").removeClass("show");
       }
    });
})