# paypal/react-engine

a composite render engine for universal (isomorphic) express apps to render both plain react views and react-router views

Repository: https://github.com/paypal/react-engine
Canonical: https://ross.abutalabs.com/products/react-engine
Language: JavaScript
License: Apache-2.0
License Family: permissive
Archived: true
Last push: 2019-04-10T08:56:12+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4164, "days_push": 2702, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1436, forks 125 (observed 2026-08-28T04:04:43.587311+00:00)

## What it is
react-engine is a composite render engine for universal (isomorphic) Express apps that renders both plain React views and react-router views on the server. It enables server-rendered views to be client mountable and integrates with Express or KrakenJS as a custom view engine.

## Use cases
- server-side render react views in an express app
- render react-router views on the server
- set up isomorphic javascript rendering with express
- use react as an express view engine
- make server-rendered views client mountable
- integrate react rendering into a krakenjs app

## When to choose
- you maintain a legacy Express or KrakenJS app that already uses react-engine
- you need a drop-in Express view engine for plain React or react-router views
- you want server-rendered React views that can be mounted on the client

## When to avoid
- you are starting a new project - use Next.js or modern React SSR frameworks instead
- you need active maintenance or recent React compatibility
- your stack is not Express-based

## Facets
- artifact type: library
- maturity: abandoned
- function: ssr, templating, web-framework, routing
- domain: web-development, frontend, backend
- platform: -
- tags: react, express, react-router, view-engine, isomorphic-javascript, jsx, nodejs, web-server

## Member repositories
- paypal/react-engine (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:43.587311+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:36:48.670008+00:00, confidence not recorded.
  - readme: https://github.com/paypal/react-engine (fetched 2026-08-28T04:04:43.587311+00:00, sha 521f0dbb7c80)
  - registry_npm: https://registry.npmjs.org/react-engine (fetched 2026-08-29T11:47:47.338237+00:00, sha d95a309d3385)
- Data as of 2026-08-30T08:39:29.467469+00:00.