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P. 151
COMPUTER SOFTWARE APPLICATION - CITS
<meta name=”viewport” content=”width=device-width, initial-scale=1.0” />
<link rel=”stylesheet” href=”css/style.css” />
</head>
<body>
<div class=”container”>
<form action=”signup.html” method=”post” id=”signup”>
<h1>Sign Up</h1>
<div class=”field”>
<label for=”name”>Name:</label>
<input type=”text” id=”name” name=”name” placeholder=”Enter your
fullname” />
<small></small>
</div>
<div class=”field”>
<label for=”email”>Email:</label>
<input type=”text” id=”email” name=”email” placeholder=”Enter your email
address” />
<small></small>
</div>
<div class=”field”>
<button type=”submit” class=”full”>Subscribe</button>
</div>
</form>
</div>
<script src=”js/app.js”></script>
</body>
</html>
Code language: HTML, XML (xml)
The HTML document references the style.css and app.js files. It uses the <small> element to display an error
message in case the <input> element has invalid data.
Submitting the form without providing any information will result in the following error:
:
The following shows the complete app.js file:
// show a message with a type of the input
function showMessage(input, message, type) {
// get the small element and set the message
const msg = input.parentNode.querySelector(“small”);
msg.innerText = message;
// update the class for the input
input.className = type ? “success” : “error”;
return type;
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CITS : IT&ITES - Computer Software Application - Lesson 37 - 46
