Convert Vite to pure ESM package

[raythurnvoid]

Currently Vite is a CommonJS package, one downside of this is that to load ES modules in SSR they have to be transformed in CommonJS and then executed.
By adding "type": "module" in Vite's package.json the import("module.js") could be used to load both CommonJS and ESM modules. Probably the whole ssrTransform.ts module could become unnecessary.

Node supports ESM without any experimental flag from version 12.

Is this something that is already planned or there is something blocking it?

[lijialiang]

I have the same problem :(

SSR node service using type: module, and vite build --ssr always builds the cjs module, even if esbuild: { format: esm } is set.