JSFiddle - React, Tailwind, and code Playground

HTML

<input class="email" />
<br/>
<div class='myDiv'>My div shown</div>

CSS

.myDiv {
  display: none;
}

JavaScript

$(".email").on("keyup change", function() {
  if ($(this).val().match(/@hotmail\.com$/)){
    $(".myDiv").show();
  } else {
    $(".myDiv").hide();
  }
});