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Next.js with Bun.js

A Deep Dive into Integrating Bun.js with Next.js: A 2023 Overview


With the evolving landscape of web development, 2023 has introduced us to the wonders of Bun.js, an innovative JavaScript runtime. Designed and curated by Jared Sumner, it proposes an all-in-one solution, positioning itself as a potential alternative to Node.js, npm, and even webpack. Next.js, with its stronghold in the React framework ecosystem, is an evident candidate for probing integration capabilities. This extensive blog post, a companion to our video tutorial, will walk you through the process, benefits, and challenges of using Bun.js with Next.js.

Why Should You Even Consider Bun.js?

Before diving into the integration, understanding the “why” behind Bun.js is crucial. Unlike traditional runtimes, Bun.js presents a comprehensive suite of tools that reimagines web development, aiming to offer more streamlined and efficient processes. Bun.js Documentation

Step 1: Initiating a Next.js Project with Bun.js

Traditionally, initiating a Next.js project would involve commands like npx, yarn, or pnpm create next-app. Bun.js aims to simplify this with bunx create-next-app. Though early adopters reported minor teething issues, developers anticipate quick fixes, given Bun.js’s active community. Next.js Documentation

Step 2: Managing Dependencies the Bun.js Way

Gone are the days when npm, yarn, or pnpm were the only players in town. Enter Bun.js with its bun install, a fresh take on dependency management, positioning itself as more than just an alternative. It introduces a new perspective on package management, generating the bun.lockb file as its seal of authenticity.

Step 3: Navigating the Runtime Landscape

Here’s where the integration gets intriguing. Presently, Next.js comfortably supports the node.js serverless runtime and the edge runtime. This dual support, especially for projects hosted on platforms like Vercel, poses an exciting question: Where does Bun.js fit in? The not-so-good news is Vercel’s current non-support for Bun.js as a runtime. But with the web development world’s pace, this could change sooner than we anticipate. However, getting a stable Bun runtime might require some patience and perhaps even your own infrastructure adjustments. Vercel Documentation

Step 4: Bun’s Potential as a Bundler

The bundling process, an integral part of web development, witnesses Next.js and its impressive integrated build system. While Bun.js positions itself as a potent bundler, replacing Next.js’s core systems, especially given Vercel’s ambitious plans with SWC and turbo pack, is no easy feat.

From Theory to Practice: My Bun.js-Next.js Integration Journey

Practical knowledge often trumps theory. My journey integrating Bun.js with Next.js paints a vivid picture:

  1. Initiation: Owing to some initial challenges with bunx, I leaned on npx to get things rolling.
  2. Transition to Bun.js: With the project created, the next step involved transitioning to Bun’s ecosystem. Running bun install efficiently replaced the default node modules, signaling a successful migration.
  3. Development Experience: My experience with the bun dev command was seamless, echoing the potential of Bun.js as a powerful development tool.
  4. Deployment Adventures: Vercel, despite its CLI not directly showcasing Bun support, pleasantly surprised in the deployment phase. The logs clearly indicated Bun.js’s role as the chosen package manager.

Reflecting on the Integration

My end-to-end integration journey was more than just a technical exercise. It was an exploration into the future of web development. The experience was generally positive, showcasing the potential that Bun.js has, especially with its version 1.0 release in September 2023.


Pairing Bun.js with Next.js offers a glimpse into the possible future trajectories of web development. As the landscape continuously evolves, it’s essential to stay updated, experiment, and decide what’s best for your projects. And while the full potential of Bun.js integration remains to be seen, early indications show promise.

For a visual representation of this exploration, don’t miss our detailed video guide. Your support via subscribing and engaging with our content is always appreciated!