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This documentation is for v14 alpha, the docs for v13 stable are archived.

Only allow @types packages in devDependencies

Only allow @types packages in devDependencies

Only allow TypeScript @types packages from being used anywhere other than in the devDependencies section of package.json.

1. Add a version group

  • Match all dependencies whose name starts with @types/.
  • Only match those dependencies when they appear anywhere except devDependencies.
  • Define the behaviour of this group as isBanned.
  • Add a label to document the decision/expectation.
{
  "versionGroups": [
    {
      "dependencies": ["@types/**"],
      "dependencyTypes": ["!dev"],
      "isBanned": true,
      "label": "@types packages should only be under devDependencies"
    }
  ]
}

2. Look for mismatches

Any @types packages which are in the wrong location can then be found and manually moved:

syncpack list-mismatches