I agree that you can (almost always) write HTML without JavaScript codes (CSS is not always needed either, but nevertheless it can be helpful). This improves portability too. If you do want to use JavaScript to generate static documents, consider using Node.js and have it output a plain HTML document, which will then be the hosted document, rather than hosting the JavaScript version. (This way, the code only has to run once.)
About fonts, I think usually the fonts are not an essential part of the document. (Still, you don't usually need to use so many, but often you do not need to specify the font at all, except you may still need to specify if it is monospace, bold, etc.) Also, you do not usually need so many pictures on your web page (except picture galleries).
I do think if you need a copy of a web page then you can copy it.
You can also use plain text documents (without HTML); it is what I often do.