Input Patterns
HTML
Medium
2 views
Problem Description
Create a username input that allows only letters and numbers (pattern).
Output Format
Print the HTML code.
Constraints
Use pattern attribute.
Official Solution
<!doctype html>
<html lang='en'>
<head>
<meta charset='utf-8'>
<meta name='viewport' content='width=device-width, initial-scale=1'>
<title>meetcode</title>
</head>
<body>
<form action='#' method='post'>
<label>Username
<input type='text' name='username' pattern='[A-Za-z0-9]+' required>
</label>
<button type='submit'>Save</button>
</form>
</body>
</html>
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