Demo
<iframe height='265' scrolling='no' title='Fibonacci in jQuery' src='//codepen.io/fastfoodcoding/embed/PKjBeL/?height=265&theme-id=light&default-tab=result&embed-version=2' frameborder='no' allowtransparency='true' allowfullscreen='true' style='width: 100%;'>See the Pen <a href='https://codepen.io/fastfoodcoding/pen/PKjBeL/'>Fibonacci in jQuery</a> by fastfoodcoding (<a href='https://codepen.io/fastfoodcoding'>@fastfoodcoding</a>) on <a href='https://codepen.io'>CodePen</a>.
</iframe>
Code
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
$("#btn").click(function() {
var first_number = 0;
var second_number = 1;
var size = $("#number").val();
result = $("#result");
var output = '0,1';
for (i = 0; i < size - 2; i++) {
var next_number = first_number + second_number;
output = (output + (",") + next_number);
first_number = second_number;
second_number = next_number;
}
$("#result").html(output);
});
});
</script>
</head>
<body>
Enter the number of items in fibonacci series:
<input type="text" name="value" id="number"></input>
<button id="btn"> Submit </button><br>
<h4>Output: <br> <span id="result"></span></h4>
</body>
</html>