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<!DOCTYPE html>
<html>
<body>
<h1>The input maxlength attribute</h1>
<form action="/action_page.php">
  <label for="username">Username:</label>
  <input type="text" id="username" name="username" maxlength="10"><br><br>
  <input type="submit" value="Submit">
</form>
</body>
</html>