LLM Best Practices

htmx vs React

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Overview

Pick htmx when the interface is HTML pages with interactions that mean “send a request, swap a region”; pick React when the client holds state that changes faster than a server round trip. htmx is a dependency-free script of about 16 KB min.gz. As of 2026-10-01 htmx 4.0 (released August 2026) is published on npm under a non-latest tag while 2.x stays latest, with 4.0 expected to become latest in 2027, so pin the major version you choose.

Comparison

DimensionhtmxReact
ModelServer returns HTML fragments; attributes trigger requestsClient components own state and render
StateServer and databaseClient (hooks, stores, query cache)
Build stepNone requiredRequired (Vite, Next.js)
Latency per interactionNetwork round tripLocal, with optimistic updates
Offline and drag-and-dropPoor fitStrong fit
SEO and accessibilityHTML by defaultNeeds SSR or Server Components, plus discipline
Mobile reuseWeb onlyReact Native
Server stackAny that renders HTML (Django, FastAPI, Rails, Go)Any API, or Next.js

Pick htmx when

Pick htmx for CRUD-shaped products where the server is the source of truth.

  • Admin panels, internal tools, content sites, and multi-page apps where each page does one job.
  • A backend-led team that wants no client bundler, API layer, or client cache to keep in sync.
  • Forms and partial updates (search, pagination, inline edit) with hx-get, hx-post, and hx-swap.
  • Use fastapi-vs-django or any server that returns HTML fragments.

Pick React when

Pick React for single-page product surfaces.

  • Drag-and-drop boards, editors, virtualized grids, real-time collaboration, charts with local interaction.
  • Offline or optimistic UI backed by tanstack-query-vs-swr.
  • Code shared with React Native, or a dedicated frontend team and the React component ecosystem.
  • If you want React with less client JavaScript, use Server Components; see server-vs-client-components.

Combine

Use htmx for the page shell and mount a React island where one screen needs rich state, or the reverse with islands in Astro (astro-islands). Moving a CRUD-shaped React SPA to htmx deletes the API layer and client state, but it is a rewrite; estimate by endpoints and screens, not lines of code.

FAQ

Can htmx replace React?

For CRUD-shaped apps where the server owns state, yes: admin panels, internal tools, content sites, and multi-page apps. Keep React for drag-and-drop, editors, real-time collaboration, offline use, or React Native reuse.

How big is htmx?

htmx is a dependency-free script of about 16 KB min.gz and needs no build step. React requires a build step such as Vite or Next.js.

Should I use htmx 4 or htmx 2?

As of 2026-10-01 htmx 4.0 is on npm under a non-latest tag while 2.x stays latest, with 4.0 expected to become latest in 2027. Pin the major version you choose.

Can I use htmx and React in the same app?

Yes; use htmx for the page shell and mount a React island where one screen needs rich state. Astro islands are the reverse arrangement.

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