Would you be able to assist me in displaying the input value from the "email" field in my alert box?
The code seems to be working fine, but I'm having trouble getting the alert box to show the email form value.
I decided to use Bootstrap for some stylish design enhancements.
<!doctype html>
<html lang="en>
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<title>Hello, world!</title>
</head>
<body>
<div class="container">
<div class="box">
<form class="text-center border border-light p-5">
<p class="h4 mb-4">CHANGE E-MAIL</p>
<p>Input Old E-mail and New E-mal</p>
<!-- Name -->
<input type="email" id="email1" class="form-control mb-4" placeholder="E-mail">
<!-- Email -->
<input type="email" name="email" id="email" class="form-control mb-4" placeholder="E-mail">
<!-- Sign in button -->
<button class="btn btn-dark btn-block" id="tombol_form" type="submit" onclick = "check();">SUBMIT</button>
</form>
</div>
</div>
</div>
</div>
<!-- Optional JavaScript -->
<script type="text/javascript">
var email=document.getElementById("email").value;
function check() {
alert ("Success your email change to: " +email)
}
</script>
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</body>
</html>