HTML

action form for this page in html

<form action="#" method="GET">
  <label for="username">Username:</label>
  <input type="text" id="username" name="username" required>
  <input type="submit">
</form>

form action in html

<!--Answer from W3 Schools-->
<form action="/action_page.php">
  <label for="username">Username:</label>
  <input type="text" id="username" name="username" required>
  <input type="submit">
</form>