How to use tui editor as html editor

[rastermechanism]

I want to integrate this editor as html editor for my website,
html content is coming from cms and it is a valid html without any risk. Upon pulling it I want to set it to editor html ,
here is what I did

`// fetched from cms
htmlContent = await fetch (url) ;

editorInstance.setHTML(htmlContent );
`

But seems editor is stripping most of the valid html tag, since those html content was not created using this editor hence it has different
tag , like math tag , with katex class.

Is there any way I can force the editor not to change the html content and show it in editor, even if I loose some css, because
it has even css that was not recognized by toast ui editor.