And why shouldn’t you — it’s your computer! But my question should have been phrased, “are there any frameworks commonly in use these days that provide differe

And why shouldn’t you — it’s your computer! But my question should have been phrased, “are there any frameworks commonly in use these days that provide different js payloads to different clients? I’ve been out of that part of the biz for a very long time so this could be a naive question.