@refastdev/create-refast-app/template/diff-merge/vitest-typescript/package.json

create-refast-app

{
  "devDependencies": {
    "happy-dom": "^13.3.4",
    "vitest": "^1.2.1"
  },
  "scripts": {
    "test": "vitest run index.test.ts"
  }
}