Dependency Types

Dependency types refer to the different locations in package.json files where dependencies can be defined.

Default Values

The default dependency types in syncpack are the ones defined by npm, pnpm, and yarn:

Name	Property in package.json
dev	devDependencies
local	version
overrides	overrides
peer	peerDependencies
pnpmOverrides	pnpm.overrides
prod	dependencies
resolutions	resolutions

Custom Values

You can extend the above list by defining your own custom types, such as:

• Engine versions (engines)
• Package manager versions (packageManager)
• Any other nested property in package.json

Using Dependency Types

Dependency types can be specified in these contexts:

Command Line Filtering

Use the --dependency-types option to target specific types in commands:

# Only check production dependencies
syncpack lint --dependency-types prod

# Check both production and development dependencies
syncpack lint --dependency-types prod,dev

# Check everything except peer dependencies
syncpack lint --dependency-types '!peer'

Configuration

Dependency types can be used to target and filter:

1. Version Groups - Carve out specific version policies
2. Semver Groups - Define which semver ranges to use with specific dependencies
3. Dependency Groups - Merge and alias families of dependencies as one