At this point, there are more AI coding agents announced every week than Javascript frameworks, but to be honest, I'm here for it.
Sure, you can have your LLM code with any JavaScript framework you want, as long as you don't mind it randomly dropping React code and React-isms in the middle of your app.
LLMs are already trained on JavaScript at a deep level; as LLM reasoning and RAG techniques improve, there will be a time in the not-too-distant future when an LLM can be pointed to the website of a new framework and be able to use it.