Maxlength not playing nice with inline_entity_form

Fixed, although I'm not sure how hackery this is or what... but it works:

function maxlength_pre_render($element) {
if (((isset($element['#maxlength']) && $element['#maxlength'] > 0) ||(isset($element['#attributes']['maxlength']) && $element['#attributes']['maxlength'] > 0)) &&
isset($element['#maxlength_js']) && $element['#maxlength_js'] === TRUE) {

isset($element['#maxlength_js']) is returning false because $element['#maxlength_js'] doesn't exist. (Not sure why?)

My fix:

function custom_mods_element_info_alter(&$cache) {
// Add prerender functions to textareas and text fields
$cache['textfield']['#pre_render'][] = 'custom_mods_pre_render';
$cache['textarea']['#pre_render'][] = 'custom_mods_pre_render';
$cache['text_format']['#pre_render'][] = 'custom_mods_pre_render';
}

function custom_mods_pre_render($element) { if (((isset($element['#maxlength']) && $element['#maxlength'] > 0) ||(isset($element['#attributes']['maxlength']) && $element['#attributes']['maxlength'] > 0)) && $element['#id'] == 'edit-field-step-und-form-title') {
$element['#maxlength'] = 100;
$element['#attributes']['maxlength_js_label'][]='@remaining characters remaining';
if ($element['#type'] == 'textarea' && !isset($element['#attributes']['maxlength'])) {
$element['#attributes']['maxlength'] = $element['#maxlength'];
}
$element['#attributes']['class'][] = 'maxlength';
$element['#attached']['js'][] = drupal_get_path('module', 'maxlength') . '/js/maxlength.js';
}
return $element;
}

I had to manually define maxlength and the maxlength label... I know this is not ideal. How can I do this better? Hey, at least I didn't hack the original module. :)