Making Media Library “Alternative Text” Field Required

1 comment

1. I’ve managed to make it work of sorts…

   The requirement is not checked in the Media Library upload /wp-admin/media-new.php, but instead in the Media Upload thickbox iframe /wp-admin/media-upload.php.

   

   ---

   The following is the code that works in the thickbox and displays an alert box making mandatory filling the Alt text field.
   _{IMO, it won’t be easy, but it can be adapted to work in the Upload New Media page (/wp-admin/media-new.php)…}

   add_action('admin_head-media-upload-popup','wpse_55240_required_alt_text');
   function wpse_55240_required_alt_text()
   {
       ?>
       <script language="javascript" type="text/javascript">
           jQuery(document).ready(function($) {
               $(".submit .savesend input").live("click", validateAltText);
   
               function validateAltText() {
                   var value = $(this).parent().parent().parent().find(".image_alt input").val();
   
                   if (value) 
                       return true;
   
                   alert("Please fill the Alt text");
                   return false;
               }
   
               $('.image_alt th label').each(function(i,e) {
                   $('<span class="alignright"><abbr title="required" class="required">*</abbr></span>').prependTo(this);
               });
   
           });
       </script>
   <?php
   }
   

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