TypeScript и модули

import { add } from "./src/lib/math.ts";
import { add as add2 } from "./src/lib/math.js";
import { add as add3 } from "./src/lib/math";
console.log(add(1, 2), add2(2, 2), add3(3, 3));

3 4 6

// app.tsx
import { renderToString } from "react-dom/server";

function Hello({ name }: { name: string }) {
  return <p>hello {name}</p>;
}

console.log(renderToString(<Hello name="elide" />));

elide install --ecosystems=npm   # react, react-dom in package.json
elide app.tsx

<p>hello <!-- -->elide</p>

{
  "scripts": { "typecheck": "tsc --noEmit" },
  "devDependencies": { "typescript": "^5.9.0", "@types/node": "^24.0.0" }
}

{
  "compilerOptions": {
    "module": "nodenext",
    "target": "esnext",
    "strict": true,
    "noEmit": true,
    "allowImportingTsExtensions": true,
    "erasableSyntaxOnly": true,
    "verbatimModuleSyntax": true,
    "types": ["node"]
  }
}

elide install --ecosystems=npm
elide run typecheck              # or: elide run tsc

bad-types.ts(1,7): error TS2322: Type 'string' is not assignable to type 'number'.

{
  "type": "module",
  "scripts": { "typecheck": "tsc --noEmit" },
  "devDependencies": { "typescript": "^5.9.0", "@elide-dev/types": "nightly" }
}

{
  "compilerOptions": {
    "module": "nodenext",
    "target": "esnext",
    "strict": true,
    "noEmit": true,
    "allowImportingTsExtensions": true,
    "types": ["@elide-dev/types"]
  }
}

// main.ts
import { Database } from "elide:postgres";
import { readFileSync } from "node:fs";

const bytes: number = readFileSync("package.json").length;
console.log(`Elide ${Elide.version}: ${bytes} bytes`);
export const open = (url: string) => Database.connect(url);

elide install --ecosystems=npm
elide run typecheck
elide main.ts

Elide 1.6.0: 149 bytes

import data from "./data.json" with { type: "json" };
import same from "./data.json";
const viaRequire = require("./data.json"); // CommonJS