Supported projects

CodeMorph works at the level of modules and imports, so it isn't tied to a particular framework. If your project is JavaScript with a package.json, it's very likely a good fit.

Languages and file types

Extension	Scanned	Converted
.js	Yes	To .ts
.jsx	Yes	To .tsx
.mjs, .cjs	Yes	Module-format aware
.ts, .tsx	Yes	Already typed
.css, .json and other assets	As import targets	No

Mixed JavaScript and TypeScript projects are fully supported. Existing TypeScript counts as already typed.

Module systems

• ES modules: import, export, export * from, export { x } from, namespace imports and default exports.
• CommonJS: require(), destructured requires, module.exports and exports.x.
• Dynamic imports: import() calls, recorded as dynamic edges.
• Type-only imports: import type, recorded separately.

See the guide CommonJS to ES modules for converting module systems during a migration.

Resolution

• Relative paths, with extension probing and index files.
• compilerOptions.paths and baseUrl from tsconfig.json or jsconfig.json.
• TypeScript NodeNext-style specifiers, where ./x.js refers to x.ts.
• Packages declared in package.json, including scoped packages and subpaths such as @scope/pkg/sub.
• Node built-ins, with or without the node: prefix.

Frameworks and runtimes

Stack	Notes
React	Components in .jsx become .tsx, with props typed from how they're rendered
Next.js	Pages, components and API routes migrate like any other module; your build script verifies framework conventions
Vite	Works alongside Vite's own TypeScript support; verified with your build
Node.js	ESM and CommonJS backends, scripts and CLIs
Express	Routes, middleware and models; see Typing an Express API

Test runners

Run & Verify runs your test script from package.json, so any runner works: Jest, Vitest, Mocha, node:test and others. Test files are recognized by .test. and .spec. in the name or a __tests__/ folder.

Package managers

npm, pnpm and Yarn projects all work. CodeMorph detects which one you use from your lockfile.

Known limits

• Files over 1 MB are skipped. These are almost always generated or bundled code.
• Multi-root workspaces: only the first folder is scanned. In a monorepo, open the package you want to migrate.
• Untrusted workspaces: the CodeMorph engine doesn't run in Restricted Mode.
• Code generated at runtime (for example, require with a computed string) can't be resolved statically and is recorded as unresolved.
• Non-JavaScript languages aren't migrated.