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wtf is react-transform-hmr?

gaearon/react-transform-hmr — explained in plain English

Analysis updated 2026-07-18 · repo last pushed 2018-03-21

★ 768JavaScriptAudience · developerComplexity · 3/5DormantSetup · moderate

TL;DR

A deprecated prototype that lets React components hot-swap in the browser on save, preserving app state instead of triggering a full page refresh.

Mindmap

mindmap
  root((react-transform-hmr))
    What it does
      Hot-swaps components
      Preserves app state
      Bridges Webpack HMR
    Tech Stack
      React
      Webpack
      Browserify
    Use Cases
      Fast dashboard iteration
      Keep form state on save
      Prototype hot reloading
    Audience
      React developers
      Frontend engineers

Code map

Detail Auto

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filefunction / class

Why would anyone build with this?

REASON 1

See instant updates to a React component while keeping form inputs and scroll position intact.

REASON 2

Bridge Webpack's or Browserify's Hot Module Replacement feature with React components during development.

REASON 3

Study a historical proof-of-concept for how React hot-reloading tools evolved into React Hot Loader 3.

What's in the stack?

JavaScriptReactWebpackBrowserify

How it stacks up

gaearon/react-transform-hmrraszi/node-tmpgaearon/todos
Stars768773785
LanguageJavaScriptJavaScriptJavaScript
Last pushed2018-03-212026-05-272020-06-10
MaintenanceDormantMaintainedDormant
Setup difficultymoderateeasyeasy
Complexity3/52/52/5
Audiencedeveloperdeveloperdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · moderate Time to first run · 30min

Deprecated and experimental, the author replaced it with React Hot Loader 3, not meant for production use.

Yoink these prompts

Prompt 1
Explain how react-transform-hmr hot-swaps a changed React component without resetting app state.
Prompt 2
Walk me through how this project bridges Webpack's Hot Module Replacement with React components.
Prompt 3
Compare what react-transform-hmr did to what its successor, React Hot Loader 3, does differently.
Prompt 4
Help me understand why this project is deprecated and what modern alternative I should use instead.

Frequently asked questions

wtf is react-transform-hmr?

A deprecated prototype that lets React components hot-swap in the browser on save, preserving app state instead of triggering a full page refresh.

What language is react-transform-hmr written in?

Mainly JavaScript. The stack also includes JavaScript, React, Webpack.

Is react-transform-hmr actively maintained?

Dormant — no commits in 2+ years (last push 2018-03-21).

How hard is react-transform-hmr to set up?

Setup difficulty is rated moderate, with roughly 30min to a first successful run.

Who is react-transform-hmr for?

Mainly developer.

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