CKEditor and escaping elements

I've using CKEditor for updating CMS content on my website. I also using FontAwesome, which includes set of fancy icons, that can be displayed like this

<i class="icon-envelope"></i>

The problem is that CKEditor escapes this i tag on client side, and I can't see it in source mode.

How I can allow this tag? I have tried CONFIG.removeFormatTags = '', but it dies not help.

Answers:

Answer

It is removed because it is empty. Put some non-breaking space &nbsp; or zero-width space &#8203; within it to preserve your tag.

You can also remove i from CKEDITOR.dtd.$removeEmpty object. This may, however, break other empty <i> tags without class="icon-envelope". To fix this you would need to play with a data processor to filter empty <i>'s without class="icon-envelope". Pretty easy I guess.

Answer

You can use unicode of &zwnj; in situation of html code showing in CKEditor for making Zero-width non-joiner (mini-space) in languages like persian.

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Answer

below worked for me.. thanks to Vince Kronlein pointing out config.fillEmptyBlocks

CKEDITOR.editorConfig = function( config ) {
       config.fillEmptyBlocks="&#8203;";  
}
CKEDITOR.dtd.$removeEmpty['span'] = false;
CKEDITOR.dtd.$removeEmpty['i'] = false;

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