When I learn node, it looks strange in many aspect. I always wander why not using then in browsers, leaving only the IO part on the server? BTW,I'm asking a qu

When I learn node, it looks strange in many aspect. I always wander why not using then in browsers, leaving only the IO part on the server? BTW,I'm asking a question, not providing advice. I know there are APIs and Copyright Protection issue and so on. But when comes to general，they are just javascript, even with the same engine.