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index.html
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<!DOCTYPE html>
<html>
<head>
<title>Advanced jQuery Email Address Validator by Mailgun</title>
<meta content="text/html;charset=utf-8" http-equiv="Content-Type">
<meta content="utf-8" http-equiv="encoding">
<style>
.success{color:#2ECC40;}
.error{color:#FF4136;}
.warning{color:#FF851B;}
</style>
</head>
<body>
<h1>Advanced jQuery Email Address Validator by Mailgun</h1>
<form>
<div>
<label for="email">Email address</label><br>
<input type="email" name="email" id="email">
<div id="status"></div>
</div>
<div>
<button type="submit" id="validate_submit">Validate</button>
</div>
</form>
<p>Try some invalid addresses:
<ul>
<li><strong>john@gmail.com</strong>: Does not meet Gmail minimum local-part length of 6 characters.</li>
<li><strong>john.smith@gmaill.com</strong>: Invalid, because gmaill.com does not have valid MX records.</li>
<li><strong>john@microsoft.io</strong>: Invalid because while microsoft.io does not have any MX records, it does have fallback A records, but alas no Mail Exchanger responds.</li>
</ul>
</p>
<p>Try some valid addresses:
<ul>
<li><strong>john.smith@gmail.com</strong>: Meets Gmail 6 character minimum and all other requirements.</li>
<li><strong>"hello world"@domain.com</strong>: Meets pure syntax checks.</li>
</ul>
</p>
<p>Remember to <a href="http://www.mailgun.com">sign up for Mailgun</a> to receive your public API key.</p>
<script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
<script src="mailgun_validator.js"></script>
<script>
// document ready
$(function() {
// capture all enter and do nothing
$('#email').keypress(function(e) {
if(e.which == 13) {
$('#email').trigger('focusout');
return false;
}
});
// capture clicks on validate and do nothing
$("#validate_submit").click(function() {
return false;
});
// attach jquery plugin to validate address
$('#email').mailgun_validator({
api_key: 'MAILGUN_PUBKEY', // replace this with your Mailgun public API key
in_progress: validation_in_progress,
success: validation_success,
error: validation_error,
});
});
// while the lookup is performing
function validation_in_progress() {
$('#status').html("<img src='loading.gif' height='16'/>");
}
// if email successfull validated
function validation_success(data) {
$('#status').html(get_suggestion_str(data['is_valid'], data['did_you_mean']));
}
// if email is invalid
function validation_error(error_message) {
$('#status').html(error_message);
}
// suggest a valid email
function get_suggestion_str(is_valid, alternate) {
if (is_valid) {
var result = '<span class="success">Address is valid.</span>';
if (alternate) {
result += '<span class="warning"> (Though did you mean <em>' + alternate + '</em>?)</span>';
}
return result
} else if (alternate) {
return '<span class="warning">Did you mean <em>' + alternate + '</em>?</span>';
} else {
return '<span class="error">Address is invalid.</span>';
}
}
</script>
</body>
</html>