# Update a value in a project's .npmrc

`npm config` will prefer to use the user-local `.npmrc` (i.e. `~/.npmrc`). We can repurpose the `--userconfig` flag to write to an arbitrary file (e.g. an `.npmrc` stored in a project) instead:

```bash
npm config set key value --userconfig .npmrc
```

This can be useful in CI scenarios:

```yaml
- name: Configure NPM_TOKEN
  run: npm config set '//npm.pkg.github.com/:_authToken' "${NPM_TOKEN}" --userconfig .npmrc
  env:
    NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
- name: Install dependencies
  run: npm ci
- name: Remove NPM_TOKEN config
  run: npm config delete '//npm.pkg.github.com/:_authToken' --userconfig .npmrc
```

Source: [stackoverflow](https://stackoverflow.com/questions/27788398/how-to-npm-config-save-into-project-npmrc-file)