React Quantum icon

React Quantum

Extension Delisted

This extension is no longer available in the official store. Delisted on 2025-09-15.

Extension Actions

CRX ID
hhfmmpjgnlcdnicngllnglhbakdkcafk
Status
  • Minor Policy Violation
  • Removed Long Ago
  • No Privacy Policy
Description from extension meta

React Quantum parses through your React application to create a color-coded tree model of its component hierarchy. On hover, each…

Image from store
React Quantum
Description from store

React Quantum parses through your React application to create a color-coded tree model of its component hierarchy. On hover, each tree node will display two key component performance metrics—render time and re-render frequency—as well as memoized state and props to indicate what, specifically, initiated the render.

The beauty is in the heat map: Nodes will change color depending on the component's rendering performance, making it easy to pinpoint possible bottlenecks at a glance. 🔥

How it works

*PLEASE NOTE*
- React Quantum utilizes the React Devtool to extract information about your React App.
- Please ensure your project is running on React 16.0+ and that you have the React Devtool installed before using React Quantum.
- Due to the minification of component names during bundling, React Quantum works best with your project bundled in development mode.

1. Open Chrome Developer Tools (Inspect) on any page that uses React, and click on React Quantum at the top of the Developer Tools panel. Upon pressing ‘Start Quantum’, a persistent connection is open and stored on the background page.

2. Refresh the page or set state to trigger a re-render. As the user interacts with the React application, the Mutation Observer listens for changes to the DOM and triggers a script injection to extract and parse the page’s fiber tree.

3. Hover over a node to view information like Component Name, Type, Commit Frequency, Render Time, Current State, and Props.

4. React Quantum runs with heatmap values out-of-the-box, but users could opt to customize their heatmap with percentage inputs at the top of the tree.

Latest reviews

Niraj Kumar
Did not work for me. Despite following the instruction provided in the extension description, nothing happened. It kept showing: Please refresh page
Daniel Wong
Must-have for any React dev who cares about perf 🙌
Mitch Ryan
Doesn't seem to work for me. Extension just says to refresh the page. Refreshing the page yields the same result.
Brian Hon
Awesome idea, works for my mini-app. can't wait to see its capabilities scaled up
Austin Peterson
pretty awesome and it just came out! can't wait to see what they add to it in the future.
Yong-Nicholas Kim
Fantastic functionality and design. Must have for React developers who want to test the performance of their apps. Where has this been all my life?
Dora Hsu
Love the heat map capability, as it makes it super easy to identify underperformers
Tai Hyun Lee
very convenient devtool
Lamont Paung
This app has changed my life. Ask me about it.