static JS js_autofocusCaretToEnd(S inputFieldSelector) {
  ret jsRequiringJQuery([[
    $(document).ready(function() {
      var input = $($inputFieldSelector);
      if (input.length != 1) return;
      var len = input.val().length;
      input[0].focus();
      input[0].setSelectionRange(len, len);
    });
  ]], +inputFieldSelector);
}