Installing packages with yarn in Node.js provides faster, more reliable, and deterministic dependency management compared to npm, with better offline capabilities and security features. As the creator of CoreUI, a widely used open-source UI library, I’ve used yarn extensively across Node.js projects for building component libraries, managing dependencies in enterprise applications, and maintaining consistent package installations across development teams. From my expertise, the most effective approach is to use yarn’s add command with proper dependency categorization. This method provides deterministic installations, faster package resolution, and excellent offline capabilities while maintaining compatibility with npm registry and package ecosystem.