Impossible to know because when I disable Javascript "the majority of the internet" works fine. As does a majority of the web. I read HN and every site submit

Impossible to know because when I disable Javascript "the majority of the internet" works fine. As does a majority of the web. I read HN and every site submitted to HN using TCP clients and a text-only browser, that has no Javascript engine, to convert HTML to text. The keyword is "read". Javascript is not necessary for requesting or reading documents. Web developers may use it but that doesn't mean it is necessary for sending HTTP requests or reading HTML or JSON. If the web user is trying to do something else other than requesting and reading, then perhaps it might not "work".