Remix vs. Next.js: Two Approaches to Full-Stack React

Remix entered the open-source world less than a year ago, and in that short time it has attracted a dedicated following. It is positioned as an “edge-first” framework built on web standards, using React for both client and server rendering. Its core premise is to deliver only the minimum amount of JavaScript needed, rendering as much HTML as possible on the server.

How Remix Works

Remix is built on the Web Fetch API, which means applications are not locked into a Node.js environment. They can run on any platform that supports the standard, including Cloudflare Workers and Deno Deploy. The framework handles server-side rendering by processing data and generating HTML before sending anything to the browser.

Its routing system is file-based, mirroring the project structure. Nested folders create nested components, so a route’s child pages are rendered as part of the parent layout. This has a practical benefit: an error in one nested component does not crash the entire page. The failure is contained to that section only.

Data handling in Remix leans on native HTTP semantics rather than JavaScript state. Server-side functions are split into two types:

  • Loaders handle GET requests, fetching data from databases or other sources.
  • Actions manage data changes through POST, PUT, DELETE, and PATCH requests.

Forms in Remix are an optimized version of the HTML <Form> element. They submit via native methods, and the action function lives in the same file as the route’s UI code. There is no separate API layer or state management library required; the flow is a straightforward request-response cycle.

Key Differences With Next.js

React Dependency

Both frameworks use React, but their relationship to it differs. Remix provides higher abstraction levels and its community is exploring implementations with Vue.js, Angular, and Svelte. Next.js is tied to React with no announced plans to support alternatives.

Rendering Strategies

Both frameworks support server-side rendering. The major divergence is in pre-rendering. Next.js offers Static Site Generation (SSG) to produce static pages at build time. This requires a rebuild whenever content or code changes, which is why the Next.js team developed Incremental Static Regeneration (ISR) and, more recently, On-Demand ISR to address that bottleneck.

Remix takes a different path. It relies on the stale-while-revalidate caching directive. Pages are primed when the app starts receiving traffic and served from cache, with background revalidations updating content for the next visitor. This avoids the need for a build step entirely.

Client-Side Navigation

Next.js implements a <Link> component that prefetches pages when the link appears in the viewport. However, this feature works only for pages built with SSG. For dynamically generated pages, the prefetch does not activate.

Remix uses the browser-native <link rel="prefetch"> tag. This allows prefetching of any page, not just statically generated ones. Next.js developers can replicate this behavior using the <link> tag within next/head.

Edge Computing

Remix was designed with edge computing as a primary goal. It is described as “edge-first,” meaning it runs server logic as close to the user as possible from its inception. Next.js historically executed server code from a central data center, but Vercel added Edge Functions as a feature, and with version 12.2 it is now possible to select the Edge Runtime for an entire Next.js project instead of the default Node.js runtime.

Server Code and State

Remix’s approach to data mutation feels closer to traditional server-side frameworks. Server code and client UI are colocated, and the framework handles request distribution. Next.js normally depends on JavaScript to manage application state and uses separate API Routes to serve server-side functionality. Code splitting and state management are explicit concerns for the developer.

Making a Choice

The selection between Remix and Next.js often comes down to project needs. Next.js offers SSG, which can be beneficial for content-heavy pages, but it introduces a build and revalidation cycle. Remix avoids that with SWR caching, making it a good fit for highly dynamic applications. The lack of a Node.js dependency in Remix opens deployment targets that Next.js only recently began to support via edge runtimes. Each is a viable tool, and the better option depends on the specific constraints and goals of the project.