j2v

library0.1.2jsnpmunverified

j2v (v0.1.2) is a CLI tool that automates migration from Jest to Vitest for JavaScript/TypeScript projects. It converts Jest configuration to Vitest, generates setup files, and removes Jest dependencies. Releases are occasional. Key differentiators: evaluates Jest config at conversion time (handles derived values), supports globals option, and provides a compatibility list of supported APIs. Limitations: CommonJS setup files break, and code style may not be preserved.

testing

npm install j2v

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INSTALL

IMPORT

SIG · J2V

j2v

testingjavascriptv0.1.2

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

j2v (CLI)

✓ npx @namchee/j2v

✗ npm install -g @namchee/j2v

Best used via npx/pnpx/bunx to avoid global install

default

✓ import '@namchee/j2v'

✗ const j2v = require('@namchee/j2v')

Not intended for programmatic use; use CLI directly.

CLI options

✓ npx @namchee/j2v --globals --dry-run

✗ j2v --globals --dry-run

Run via npx or after local install.

Run j2v on a project directory with globals enabled in dry-run mode.

npx @namchee/j2v my-project --globals --dry-run # or install locally: pnpm add -D @namchee/j2v pnpm j2v --globals

Debug

Known issues

gotchaCommonJS setup files will break after migration.

fix

Convert .cjs or .js (CJS) setup files to ES modules before running j2v.

affects: >=0.0.0

gotchaCode style (dangling commas, semicolons, etc.) may not be preserved after migration.

fix

Run a formatter like Prettier or Biome after migration.

affects: >=0.0.0

gotchaDerived configuration values (e.g., from variables or functions) will be evaluated to raw values.

fix

Review the generated Vitest config to ensure derived values are correct.

affects: >=0.0.0

deprecatedPackage name is @namchee/j2v, not j2v.

fix

Use @namchee/j2v in install/runtime commands.

affects: >=0.0.0

Errors

Common errors & fixes

Error: Cannot find module '@namchee/j2v'

Running j2v without installing or using npx.

fix

Use npx @namchee/j2v or install locally.

ERR_PNPM_RECURSIVE_RUN_FIRST_FAIL ERR_PNPM_UNEXPECTED_PKG_CONTENT j2v

Local binary not found when running via pnpm script.

fix

Add '@namchee/j2v' to devDependencies and run via 'pnpm @namchee/j2v' or use pnpx.

TypeError: Cannot read properties of undefined (reading 'config')

Running j2v in a directory without jest.config or package.json with jest config.

fix

Ensure the target directory has a Jest configuration file.

Upgrade

Version history

0.1.2latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

7 hits · last 30 days

node

Amazon

Resources

packagej2v ↗