Some Tags from code editor is not giving output.

Hi @givanz ,

Cheers for your awesome work! You did really well. Thanks for making this opensource.

I am having 2 problems here.

1. Some tags from code editor isn not giving the correct output
   When i change page title or link of any CSS file from editor it does not give output
2. When we checked "Run js code on edit" it throws this error in my project and your project also

builder.js:178 Uncaught TypeError: Cannot read property 'html' of undefined
    at Object.setHtml (builder.js:178)
    at plugin-codemirror.js:3
    at codemirror.js:958
    at fireCallbacksForOps (codemirror.js:942)
    at finishOperation (codemirror.js:949)
    at endOperation (codemirror.js:1691)
    at runInOp (codemirror.js:1758)
    at TextareaInput.poll (codemirror.js:4088)
    at HTMLTextAreaElement.<anonymous> (codemirror.js:4028)
    at HTMLTextAreaElement.c (VM1158 rocket-loader.min.js:1)
setHtml @ builder.js:178
(anonymous) @ plugin-codemirror.js:3
(anonymous) @ codemirror.js:958
fireCallbacksForOps @ codemirror.js:942
finishOperation @ codemirror.js:949
endOperation @ codemirror.js:1691
runInOp @ codemirror.js:1758
TextareaInput.poll @ codemirror.js:4088
(anonymous) @ codemirror.js:4028
c @ VM1158 rocket-loader.min.js:1

Let me know if you are looking for more info for reproducing this issue.

Start by reproducing the page-title and CSS-output problems, then inspect builder.js at line 178 and the callback in plugin-codemirror.js. Test the “Run js code on edit” option in both projects and verify that edits produce the expected output without the reported TypeError.