Node.js ESM export support

[pi0]

Hi :) Trying vue-demi (as a dependency of vue-global-api) on latest nuxt3 version, production build fails since there is no import matcher. (and currently node condition is set to cjs)

Could not resolve import "vue-demi" in ..../node_modules/vue-global-api/onActivated.mjs using exports defined in ..../node_modules/vue-demi/package.json

It can be fixed by adding import field to package.json: (should be ideally esm build)

  "exports": {
    ".": {
      "require": "./lib/index.cjs.js",
++   "import": "./lib/index.cjs.js",
      "node": "./lib/index.cjs.js",
      "browser": "./lib/index.esm.js"
    },
    "./*": "./*"
  },

• Note: I think it would be much better if you tend to use explicit .mjs and .cjs extensions so that tooling can infer module type.
• Note: SSR vs Node: node condition can be added to niro resolver but since there are also non Node.js SSR environments (like Cloudflare workers) we would need import only support

[dragomirweb]

your fix worked