Example
Test
<!DOCTYPE html>
<html lang="en">
<head>
<style>
.showHide {
display: none;
}
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js"></script>
<script>
$(document).ready(function(){
$('#event').on('click', function() {
// Using toggle to switch between hidden/shown
$('.showHide').toggle(500);
});
});
</script>
</head>
<body>
<button id="event" class="show" type="button">Show Text</button>
<div class="showHide">
Test
</div>
</body>
</html>