feat: typescript support

CHANGELOG.md

@@ -5,6 +5,27 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.4.0] - 2026-06-01
+
+### Added
+- **JSX/TSX support**: `.jsx` and `.tsx` files now run directly through the runtime. `.tsx` is type-stripped first (the existing TS pass) and then JSX is compiled to factory calls; `.jsx` goes straight through the JSX pass. `node app.tsx`, `require('./Component.tsx')`, and `index.tsx`/`index.jsx` directory resolution all work.
+  - Implemented with `acorn-jsx` (already a dependency) — a small, synchronous, pure-JS codegen pass, no Babel/esbuild and no wasm, keeping the bundle lean.
+  - The transform is **config-driven**: the nearest `tsconfig.json` or `jsconfig.json` in the VFS is resolved by walking upward from the script being transformed. `jsx` (`react` → classic `React.createElement`; `react-jsx`/`react-jsxdev` → automatic `react/jsx-runtime`), `jsxImportSource`, `jsxFactory`, and `jsxFragmentFactory` are all honored. Defaults to the automatic runtime with `react` when no config is found.
+  - Handles intrinsic vs. component tags, member-expression components (`<Foo.Bar/>`), fragments, spread attributes/children, boolean attribute shorthand, `key` extraction (automatic runtime), nested JSX inside expressions, JSX whitespace collapsing, and HTML entity decoding.
+- **TypeScript import extension rewriting**: imports/requires that reference a sibling by its *output* extension (`import './foo.js'`, `require('./Card.jsx')`) now resolve to the TypeScript source on disk (`.ts`/`.tsx`/`.mts`/`.cts`) when the literal file is absent — matching `tsc`/Node behavior. A real `.js` sibling still wins over the rewritten `.ts`. Works from both `.js` and `.ts`/`.tsx` files.
+
+### Fixed
+- **Named exports now preserve their local binding** in the ESM→CJS transform. `export const`/`function`/`class` declarations previously became `exports.X = ...` outright, dropping the local `X` binding so later module-scope references broke (e.g. `export const o = {}; o.key = 'v'` produced invalid `exports.o = {}; o.key = 'v'`). The declaration is now kept and the value is assigned onto `exports` separately. Destructuring exports (`export const { a, b } = obj`, `export const [x] = arr`) export each bound name.
+
+## [0.3.0] - 2026-06-01
+
+### Added
+- **Native TypeScript support**: `.ts`, `.mts`, and `.cts` files now run directly through the runtime, mirroring Node.js's native type-stripping (stable since Node 23.6). `node app.ts`, `require('./mod.ts')`, and `index.ts` directory resolution all work out of the box.
+  - Implemented with `acorn-typescript`, a pure-JS acorn plugin — no `typescript` compiler dependency and no wasm, so stripping is synchronous (required for `require()`) and adds minimal bundle weight.
+  - Type-only syntax (annotations, interfaces, type aliases, generics, `import type`/`export type`, `as`/`satisfies`, non-null `!`, definite assignment, `declare`, class member modifiers, `implements`) is replaced with whitespace, preserving source positions.
+  - `.cts` is treated as CommonJS and `.mts`/`.ts` as ESM-capable, consistent with Node.
+  - Like Node's strip-only mode, constructs requiring code generation (enums, namespaces, parameter-property assignment) are not emitted.
+
 ## [0.2.14] - 2026-02-14
 
 ### Added

README.md

@@ -22,7 +22,7 @@ Built by the creators of [Macaly.com](https://macaly.com) — a tool that lets a
 - **Run Any CLI Tool** - npm packages with `bin` entries (vitest, eslint, tsc, etc.) work automatically
 - **Dev Servers** - Built-in Vite and Next.js development servers
 - **Hot Module Replacement** - React Refresh support for instant updates
-- **TypeScript Support** - First-class TypeScript/TSX transformation via esbuild-wasm
+- **TypeScript & JSX Support** - Run `.ts`/`.mts`/`.cts` files directly via Node-style type-stripping, plus `.jsx`/`.tsx` via a synchronous, pure-JS JSX transform that's config-driven from the nearest `tsconfig.json`/`jsconfig.json`; first-class TypeScript/TSX transformation in dev servers via esbuild-wasm
 - **Service Worker Architecture** - Intercepts requests for seamless dev experience
 - **Optional Web Worker Support** - Offload code execution to a Web Worker for improved UI responsiveness
 - **Secure by Default** - Cross-origin sandbox support for running untrusted code safely