<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <h2>Simple Jquery Append</h2> </div> <span id="test">Click button</span> <br> <span id="test1">append-> </span> <br> <button id="click">click me</button> </div> <script> jQuery("#click").click(function(){ jQuery("#test").html("Hello World"); jQuery("#test1").append("I love Jquery"); }); </script>

jQuery("#click").click(function(){ jQuery("#test").html("Hello World"); jQuery("#test1").append("I love Jquery"); });