Using env.jsonc, you control the dependencies of components in a central configuration file.
This is commonly used for setting peer dependencies such as your framework, styled-components, or dev dependencies like typescript or jest.
For example, configuring react as a peer dependency requires setting up the version you want your component to use for it's build and other operations. You can also set an optional compatibility version range.
{
"policy": {
"peers": [
{
"name": "react", // name of the dependency
"version": "19.0.0", // version to use for development purposes
"supportedRange": "^17.0.0 || ^18.0.0 || ^19.0.0" // supported range to expects consumers to have
}
]
}
}When to use peers?
To better understand when to set dependencies as peerDependencies, see here