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• JustAMacUser Member

  April 2016

  I think you can filter this with the get_image_tag_class filter. I'm basing this off a quick search of the WordPress code.

  Thanked by 1Falzo
• Falzo Member

  April 2016 edited April 2016

  as far as I can see, this is referenced in

   wp-includes/media.php
   wp-includes/js/tinymce/plugins/wpeditimage/plugin.js
   wp-includes/js/media-editor.js
  

  especially the javascripts use functions like

   classes.push( 'wp-image-' + imageData.attachment_id );
   props.classes.push( 'wp-image-' + attachment.id);
  

  so maybe it is not the best idea to try and get rid of it, because it may break things...

  and as those files are core-files of WP and it looks like those classes are attached via js anyway, I'd definitely recommend to go and try to remove it with javascript also.
  that you can easily put as a custom function into the footer of your theme or something alike. otherwise changes to the core-files will probably be overridden on the next update.
• Falzo Member

  April 2016

  @JustAMacUser said:
  I think you can filter this with the get_image_tag_class filter. I'm basing this off a quick search of the WordPress code.

  +1 for this, good hint!

  just read across and it seems that only the tinymce and media editor are adding those classes via js. so maybe the risk of breaking something by removing it for the visitor changes to very low ;-)

  that way one may be able to filter it before the html output is generated, as suggested over there http://wordpress.stackexchange.com/questions/120133/strip-image-classes-from-html-output