Drop textarea.js in favor of CSS3 resize

API changes

• textarea.js, previously used to create resizable textarea form elements, has been removed from core.
• Instead, the CSS3 resize property for textarea elements now controls this behavior.
• The #resizable Form API property now supports four possible values:
  • vertical
  • horizontal
  • both
  • none
• The following styles are available to themes
  • resizeable-vertical
  • resizeable-horizontal
  • resizeable-both
  • resizeable-none

UI changes

Before

Now

Sample usage

Before

function mymodule_foo_form(&$form, &$form_state) {
  $form['blank_verse'] = array(
    '#type' => 'textarea',
    '#title' => t('Blank verse poem'),
    '#description' => t('Lines should be five iambic feet.'),
    '#resizable' => TRUE,
  );
}

Now

function mymodule_foo_form(&$form, &$form_state) {
  $form['blank_verse'] = array(
    '#type' => 'textarea',
    '#title' => t('Blank verse poem'),
    '#description' => t('Lines should be five iambic feet.'),
    '#resizable' => 'vertical',
  );
}