Mick Redman: awesome

Tuesday, 10 February 2015

Using Font Awesome icons and jQuery to show form loading in Twitter Bootstrap page

Font Awesome is a really useful tool for adding icons to your website. It also comes with animated icons which can be used to show when your form is waiting for a response. In the example below, I have created a basic Twitter Bootstrap page. The page has a form. When the form is submitted, there is a delay in its response. During the delay, I use jQuery to show a Font Awesome animated icon.
First the Twitter Bootstrap page with the differences in red:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Font Awesome Animated Icons</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css">
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">

</head>
<body>
<i class="fa fa-circle-o-notch fa-spin"></i>
<form action="response.php" method="POST">
<input type="text" name="yourname" id="yourname" placeholder="Enter your name" />
<button type="submit">Submit</button>
</form>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js"></script>
<script>
(function()
{
var thisForm = $('form');
var i = $('i');
i.hide();
thisForm.submit(function()
{
i.show();
thisForm.hide();
$.post(thisForm.attr('action'),thisForm.serialize(),
function(data)
{
thisForm.empty().html(data);
i.hide();
thisForm.show();
});
return false;
});
})();
</script>
</body>
</html>
Now my response.php
<?php
sleep(2);
echo 'Hello '.$_POST['yourname'];
?>