CKEditor not support XHTML

[Mikhail Gavrilov]

Demonstration: ​http://ckeditor.sy24.ru/

Error in console: ckeditor.js:762 Uncaught SyntaxError: Failed to set the 'innerHTML' property on 'Element': The provided markup is invalid XML, and therefore cannot be inserted into an XML document.

[Jakub Ś]

First of all the <![CDATA[ ]]> should be written as //<![CDATA[ //]]> and second, script has to be written as <script src="ckeditor.js"></script>. Please see ​https://www.w3.org/TR/html-markup/script.html#script.

[Mikhail Gavrilov]

Please note that you shows the document describes HTML instead of XHTML. ​https://www.w3.org/TR/xhtml1/#C_4 Where I can download uncompressed CKEditor for debug this problem?

[Jakub Ś]

Please see this answer ​http://stackoverflow.com/a/2375736 and especially this part:

Because <![CDATA[ is not valid JS, you'll get a JavaScript syntax error. (The other answers are wrong here: it's not just very old browsers, but all HTML4 browsers, that will give errors for an uncommented CDATA section in script.)

You can get source code from: ​http://docs.ckeditor.com/#!/guide/dev_source