Improve ESM support through CommonJS

[bogeychan]

At the moment it is not possible to import CommonJS into ESM because the exports defined in package.json (of all projects) are sorted incorrectly.

---

Example: (run with node main.js)

// main.js
import Elysia from 'elysia';

new Elysia.Elysia();

Error: (yes, i've "type": "module" in my package.json)

SyntaxError: Cannot use import statement outside a module

---

The sorting is important. Node.js & Deno apparently check from top to bottom. This means that if it is ESM-context, import is used instead of require or node.

Therefore node must move further up and point to CommonJS (in all exports):

{
  "bun": "./dist/index.js",
+ "node": "./dist/cjs/index.js"
  "require": "./dist/cjs/index.js",
  "import": "./dist/index.js",
  "default": "./dist/index.js",
- "node": "./dist/index.js"
}

Furthermore, type or runtime errors occur when CommonJS is imported into ESM, because SWC breaks named exports for ESM in CommonJS build (i.e. module.exports):

❌ SWC

(function (e, t) {
  for (var r in t) Object.defineProperty(e, r, { enumerable: !0, get: t[r] });
})(exports, {
  Elysia: function () {
    return h;
  },
  default: function () {
    return u;
  }
});

Runtime Error

import { Elysia } from 'elysia';
         ^^^^^^
SyntaxError: Named export 'Elysia' not found. The requested module 'elysia' is a CommonJS module, which may not support all module.exports as named exports.
CommonJS modules can always be imported via the default export, for example using:

import pkg from 'elysia';
const { Elysia } = pkg;

OR Type error

import Elysia from 'elysia';

const app = new Elysia.Elysia() // Property 'Elysia' does not exist on type 'typeof Elysia'.ts(2339)

✅TSC (without SWC)

exports.Elysia = Elysia;
exports.default = Elysia;

---

I can make (or help you with) the changes to exports in all package.json, but I don't know how you wanna handle SWC.

An alternative would be to drop CommonJS and only support ESM → "moduleResolution": "nodenext" & "type": "module" (i.e. specify all imports and exports with .js extension). This would work for Node.js and Deno too.

[bogeychan]

For reference, I made basic adjustments in my fork

Just run bun run test:node

[SaltyAom]

We will be using tsc to compile CommonJS to support module.exports syntax instead.

Should be released on 0.5.14 with this commit 69a130d

[bogeychan]

That should be all.

• Updating memoirist is not necessary as it is imported from CommonJS, so require is used anyway
• I could not update @elysiajs/websocket because there are a bunch of type errors when upgrading Elysia.js to 0.5.12

[SaltyAom]

For @elysiajs/websocket is migrated to the core package via elysia/ws, so no need to update the package.

That should be all for CommonJS, so I'm closing the issue.