JQuery usando velho JavaScript
Exemplo: Validação de e-mail
<!DOCTYPE HTML>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
</head>
<body>
<input type="email" id="email" />
<br />
<input type="button" id="button" value="validate email"/>
<input type="reset" id="reset"/>
<script type="text/javascript">
$("#button").click({ value: "email" }, ValidateEmail);
function ValidateEmail(event) {
ValidateEmailAddress(event.data.value);
}
function ValidateEmailAddress(a) {
var emailRegex = /^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/;
var email = String(document.getElementById(a).value);
if ((undefined !== email) && ("" !== email) && !emailRegex.test(email)) {
alert("Invalid email address.\nPlease check the value and try again.");
}
}
</script>
</body>
</html>Referência: https://emailregex.com/
Licença CC BY-SA 4.0
Silvia Pinhão Lopes, 26.11.18
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