# Using npm

{% hint style="info" %}
This page was generated from content adapted from the [AWS Developer Guide](https://github.com/awsdocs/aws-codeartifact-user-guide.git)
{% endhint %}

## Configure and use npm

* **Note**\
  If you are accessing a repository in a domain that you own, you don't need to include `--domain-owner`. For more information, see [Cross-account domains](https://github.com/kevinslin/aws-reference-notes/blob/main/services/aws_code_artifact/domain-overview.md#domain-overview-cross-account).
* **Important**\
  The registry URL must end with a forward slash (/). Otherwise, you cannot connect to the repository.

## Configure and use Yarn

* **Note**\
  `Yarn 1.X` reads and uses information from your npm configuration file (.npmrc), while `Yarn 2.X` does not. The configuration for `Yarn 2.X` must be defined in the .yarnrc.yml file.

## Support for npm-compatible package managers

* **Note**\
  We recommend using Yarn 2.x with CodeArtifact. Yarn 1.x does not have HTTP retries, which means it is more susceptible to intermittent service faults which result in 500-level status codes or errors. There is no way to configure a different retry strategy for Yarn 1.x, but this has been added in Yarn 2.x. You can use Yarn 1.x, but you may need to add higher-level retries in build scripts. For example, running your yarn command in a loop so that it will retry if downloading packages fails.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://awsnotes.dendron.so/developer-tools/aws-codeartifact/topics/using-npm.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.