javascript - ckeditor removing empty span automatically -

i using ckeditor , have vary strange issue.

it remove automatically empty <span> example

 <span class="new-class"></span>

removed automatically.

i searching solution last 2 days no success. try put following code in

config.js

ckeditor.config.allowedcontent = true;

but no success.

i add following code in html use ckeditor no success.

   <script>      var editor = ckeditor.replace( 'editor1', { allowedcontent: true,     } );    </script>

thanks

you'll find 2 valid answers in question: ckeditor strips <i> tag

one says it's not possible keep them if want see them in editor , second says can prevent them deleting, you'll hide them.

Detect