How to set up React Hot Loader with webpack from scratch?

Add 'react-hot-loader/babel' to your Babel config, mark the root component with hot() from 'react-hot-loader/root', and include 'react-hot-loader/patch' in webpack entry or import it before React. Detailed steps are in the 'Getting started' section of the README.

React Hot Loader vs Fast Refresh: which is better in 2024?

React Fast Refresh is the modern, built-in solution recommended by the React team, offering better performance and integration. React Hot Loader is deprecated and only useful for legacy projects where Fast Refresh isn't supported, like with older bundlers.

Why does React Hot Loader cause hooks to lose state?

Hook reloading depends on dependency arrays and order; changes can trigger remounts or errors. Using @hot-loader/react-dom and setting config options like reloadHooks can mitigate this, but it's not foolproof, as noted in the hook support limitations.

How to migrate an existing project from React Hot Loader to Fast Refresh?

Remove React Hot Loader dependencies and Babel plugins, then enable Fast Refresh via your bundler's plugin (e.g., for webpack) or use built-in support in tools like Create React App. The README lists compatible environments and suggests checking for updates.

Does React Hot Loader work with TypeScript without ejecting?

Yes, but it requires configuring Babel to handle TypeScript with the react-hot-loader/babel plugin, and you might need additional tools like fork-ts-checker-webpack-plugin for type safety, as described in the TypeScript recipe.

Can I safely use React Hot Loader in production builds?

The tools have a minimal footprint and are safe if configured correctly with NODE_ENV=production, but since it's deprecated, it's better to migrate to Fast Refresh for long-term stability and support.

Open-Awesome

React JS Hot loader Boilerplates

MITJavaScriptv4.13.0

A deprecated library for live-editing React components during development without losing state.

Visit Website GitHub

12.2k stars780 forks0 contributors

What is React JS Hot loader Boilerplates?

React Hot Loader was a development tool for React applications that allowed developers to see changes to components immediately without losing component state. It integrated with bundlers like webpack to enable hot module replacement specifically for React, making the edit-refresh cycle nearly instantaneous. The project is now deprecated in favor of React Fast Refresh, which is built into modern React tooling.

Target Audience

React developers using webpack or similar bundlers who want a faster feedback loop during UI development. It was particularly useful for teams building complex single-page applications where preserving state across reloads saves significant development time.

Value Proposition

Developers chose React Hot Loader because it provided a seamless hot reloading experience for React before native solutions existed, with robust state preservation and wide ecosystem support. Its main advantage was reducing context switching by allowing continuous tweaking of components without manual refreshes.

Overview

Tweak React components in real time. (Deprecated: use Fast Refresh instead.)

Use Cases

Best For

Speeding up React development with instant visual feedback
Prototyping UI components without resetting state
Debugging React component behavior in real time
Maintaining complex application state during iterative changes
Legacy projects not yet migrated to React Fast Refresh
Educational environments demonstrating live coding with React

Not Ideal For

Teams using modern bundlers like webpack with the Fast Refresh plugin installed
New React projects on environments that natively support Fast Refresh, such as Create React App v4+ or Next.js 9.4+
Developers who prioritize minimal configuration and want built-in hot reloading without patching react-dom
Projects on React Native 0.61+ where Fast Refresh is integrated and recommended

Pros & Cons

Pros

Live State Preservation

Maintains component state across hot reloads, reducing disruption during development, which is a core feature highlighted in the key descriptions.

Wide Bundler Integration

Works seamlessly with webpack's HMR and includes a Babel plugin for compatibility, as detailed in the installation and setup steps.

Conditional Hook Support

Allows hot reloading of React hooks based on dependency arrays, with options to configure behavior, though it requires careful setup as explained in the hook section.

Built-in Error Handling

Incorporates error boundaries to catch and display errors during updates, improving debugging efficiency during iterative changes.

Cons

Officially Deprecated

The README explicitly states it's expected to be replaced by React Fast Refresh, making it obsolete for new development and not recommended by the React ecosystem.

Complex Configuration Burden

Requires multiple steps like Babel plugin integration, webpack patches, and sometimes replacing react-dom with @hot-loader/react-dom, which can be error-prone and time-consuming.

Unreliable Hook Updates

Hook reloading is conditional and can fail if hook order changes, leading to state loss or runtime errors, as admitted in the limitations and troubleshooting sections.

Diminishing Maintenance

With the shift to Fast Refresh, community support and updates are waning, potentially causing compatibility issues with newer React versions or tooling.

Frequently Asked Questions

Related Projects

Hackathon Starter

A boilerplate for Node.js web applications

Stars35,214

Forks8,172

Last commit3 days ago

Electron React Boilerplate

A Foundation for Scalable Cross-Platform Apps

Stars24,240

Forks4,004

Last commit8 days ago

React Redux Universal Hot Example

A starter boilerplate for a universal webapp using express, react, redux, webpack, and react-transform

Stars12,162

Forks2,473

Last commit1 year ago

Node-Express-Mongoose Boilerplate

A boilerplate for building production-ready RESTful APIs using Node.js, Express, and Mongoose

Stars7,626

Forks2,263