Document how to add new dependencies

[haakemon]

Description

If we dont add new dependencies to the exclude list in rollup config, then the dependency will be bundled. This is in most cases not what we want - we want the dependency to be resolved automatically where the package is used.

Related comment #60 (comment)

Additional Information

Could also look into if there exists a rollup plugin to handle this automatically, similar to how peerDependencies are handled

Tasks

No response

Acceptance Criterias

• Document that when adding a new dependency to package.json, you also have to update exclude list in rollup config
  OR
• Find a plugin that will deal with this automatically

The end result should be the same - items in dependencies in package.json should not be part of the generated bundle.

[olemartinorg]

This is the code I've been using in another project to exclude packages:

import pkg from 'package.json';

const externals = []
    .concat(Object.keys(pkg.dependencies))
    .concat(Object.keys(pkg.devDependencies))
    .concat(require('module').builtinModules || Object.keys(process.binding('natives')));

[haakemon]

https://github.com/Altinn/altinn-design-system#adding-new-dependencies