###1. Verdaccio is a simple local private npm repository that requires no configuration. Simple configuration can be used quickly! Verdaccio comes out of the box, has a small database built in, and supports proxy for other repositories (such as npmjs.org), caching downloaded modules in the process. For users who want to expand storage capabilities, Verdaccio supports a variety of community-made plug-ins. You can access Amazon S3, Google Cloud Storage and other services, or create your own plug-ins. ###2. What can Verdaccio do for you? 1. Use private packages If you want to enjoy all the benefits of the npm package system internally without having to expose your code, while being able to use private packages as easily as you would use public packages, Verdaccio is the ideal choice. 2. Cache npmjs.org warehouse If you have multiple servers that need to install packages, you can use Verdaccio to reduce latency (usually only need to connect to the "slow" npmjs.org once per package/version) and provide limited failover capabilities (for example, when npmjs.org goes down, there may still be useful content in the cache). In addition, it avoids problems such as a single developer using 11 lines of JavaScript to paralyze Node, Babel, and thousands of projects, many packages suddenly disappear, or previously installed packages suddenly return 404 errors. 3. Link multiple mirror sources If your organization uses multiple mirror sources and needs to retrieve packages from multiple sources in one project, you can take advantage of Verdaccio's upstream linking feature (uplinks) to concatenate multiple mirror sources and retrieve packages from a single endpoint. 4. Covering public packages If you need to use a modified version of certain third-party packages (for example, if you discover a bug, but the maintainer has not accepted your PR), you can publish your modified version locally with the same package name. See here for more details. 5. End-to-end testing (E2E Testing) Verdaccio is a lightweight mirror source that can be booted in seconds and is ideal for CI environments. Many open source projects use Verdaccio for end-to-end testing, such as create-react-app, mozilla neutrino, pnpm, storybook, babel.js, angular-cli, and docusaurus. Detailed information can be found here.
