What is it

Setting the name property in package.json will define the label reference.

main attribute defines the entrypoint location of the name.

// without scoping in name
{
  "name": "package_name",
  "main": "src/index.ts"
}

// with scoping in name
{
  "name": "@scope_name/package_name",
  "main": "src/index.ts"
}

Referencing the named package in other code location:

import config from 'package_name/config';

If there is a scope attached to the parent directory:

import config from '@scope_name/package_name/config';