Required "type" attribute is missing in the <style> element generated by the editor

[Jan Pechanec]

Type is required attribute of <style> tag according to ​http://www.w3.org/TR/html401/present/styles.html#style-group

But CKEDITOR generates following

<style>.cke{visibility:hidden;}</style>

There shall be simple fix - add attribute " type='text/css' " to generated <style> tag. We tried to fix downloaded source code by adding one line into document.js:

  var style = new CKEDITOR.dom.element( 'style', this );
  style.setAttribute('type','text/css'); //added by us
  style.append( new CKEDITOR.dom.text( cssStyleText, this ) );

But it seems it does not work in Internet Explorer 11.

It is causing problems with formal validation of HTML code in IBM internal application.

[Jakub Ś]

Since this attribute is required in HTML 4 and optional but valid in HTML 5 there is no problem in adding this attribute. We will keep backward compatibility and won't break anything.