​​Experimental no-bundle dev server for #vue SFCs.

The primary difference is that for vite there is no bundling during development. The ES Import syntax in your source code is served directly to the browser, and the browser parses them via native <script module> support, making HTTP requests for each import. The dev server intercepts the requests and performs code transforms if necessary. For example, an import to a vue file is compiled on the fly right before it's sent back to the browser.

There are a few advantages of this approach:
- Since there is no bundling work to be done, the server cold start is extremely fast.
- Code is compiled on demand, so only code actually imported on the current screen is compiled. You don't have to wait until your entire app to be bundled to start developing. This can be a huge difference in apps with dozens of screens.
- Hot module replacement (HMR) performance is decoupled from the total number of modules. This makes HMR consistently fast no matter how big your app is.

vite is highly experimental at this stage and is not suitable for production use, but we hope to one day make it so.

https://github.com/vuejs/vite