You do JS in the old days. JS today is a bigger mess. Is possible to avoid problems I use vue, without npm, package managers or anything else than direct link

You do JS in the old days. JS today is a bigger mess. Is possible to avoid problems I use vue, without npm, package managers or anything else than direct link in the head. But I need to be care-full in what to code and check support across browsers. --- About "not robust". In fact what need to be defended is how is possible to call it robust! But anyway: JS is a badly designed language, have weird edge cases, and will fail silently (the worst of all) in many ways. A robust language not only catch stupid errors, but have a better std support (like having integers!) and better defaults and ways to do data transformations.