🧠 Introduction (Context Setting)

Modern JavaScript development is no longer just about writing code—it’s about managing an ecosystem of dependencies, tools, and workflows. At the center of this ecosystem are package managers like npm, Yarn, and pnpm, along with newer entrants like Bun.

These tools define how you:

Install libraries

Manage dependencies

Execute scripts

Optimize performance and disk usage

As the ecosystem evolved, so did the tooling:

npm established the foundation as the default package manager for Node.js

Yarn introduced better performance and deterministic installs

pnpm optimized storage and dependency isolation

Bun reimagined the stack by combining runtime, package manager, and bundler into a single tool

Amid all this, utilities like npx added another layer of abstraction—allowing developers to execute packages without installing them globally.

This rapid evolution has created a common problem:

Developers often use these tools daily without fully understanding how they differ…