No, but GUI frameworks can generate it for you. Same goes for DOM access, for which there’s normally only a JavaScript API.
So, you’ll likely want to read JS, when researching what events or properties you can read/write for certain HTML nodes in the DOM, but with a mature GUI framework, you should not need to write any JS.
Have they finally dumped the required js stub loader?
No, but GUI frameworks can generate it for you. Same goes for DOM access, for which there’s normally only a JavaScript API.
So, you’ll likely want to read JS, when researching what events or properties you can read/write for certain HTML nodes in the DOM, but with a mature GUI framework, you should not need to write any JS.