download jquery 3.5.1 code example
Example 1: jquery
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
Example 2: jquery
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
Example 3: jquery
var hiddenBox = $( "#banner-message" );
$( "#button-container button" ).on( "click", function( event ) {
hiddenBox.show();
});