Restore cursor position on #ajax 'input' or 'keyup' event

@Pancho Thank you for reporting this problem.

Is this issue still a problem? If so, can we have steps to reproduce.

Since we need more information to move forward with this issue, I am keeping the status at Postponed (maintainer needs more info). If we don't receive additional information to help with the issue, it may be closed after three months.

Thanks!

Code to reproduce:

  public function buildForm(array $form, FormStateInterface $form_state): array {
    $form['textfield'] = [
      '#type' => 'textfield',
      '#ajax' => [
        'callback' => '::ajaxUpdateTextfield',
        'event' => 'input',
        'wrapper' => 'textfield',
      ],
      '#prefix' => '<div id="textfield">',
      '#suffix' => '</div>',
    ];

    return $form;
  }

  public static function ajaxUpdateTextfield(array $form, FormStateInterface $form_state): array {
    return $form['textfield'];
  }

Video:

Thanks for the video @xandeadx that could be really annoying.