Add autocomplete to an HTML password field

The HTML autocomplete attribute provides a wide variety of options for <input> fields. One of these is the new-password value, which can be used when the user is asked to create a new password (e.g. signup or reset password forms). This value ensures that the browser will not accidentally fill in an existing password, while it also allows the browser to suggest a secure password:

<form action="signup" method="post">
  <input type="text" autocomplete="username">
  <input type="password" autocomplete="new-password">
  <input type="submit" value="Sign up">
</form>

Additionally, if the form contains a second password field asking the user to retype the newly created password, autocomplete="new-password" should be used for both of the password fields.