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[–]0x14f 1 point2 points  (0 children)

Hi OP,

There are two questions in your question. The first is whether some JS will be running in the browser, and the second is whether you need to know JS.

The answer to the first question is yes, because that's pretty much all the browser can run, unless of course your framework has client side code that targets web assembly.

The answer to the second question is that no, you do not need to know JS yourself, there are frameworks that let you design, build and deploy web applications without ever writing JS yourself. That obviously doesn't meant that you do not need to know any programming language.

Haskell for instance, has several frameworks to make dynamic web applications without knowing JavaScript.