A Chrome extension that helps debug React applications by memorizing the state of components with every render.

Latest Version

Version
25.0.0
Update
May 17, 2024
Size
803KiB
Developer
Category
Users
3,000+
Rating
4.72727 ★
Manifest Version
3
Web Store Status
Languages Support
English (United States)
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Permissions
ContextMenus
Tabs
ActiveTab
Scripting
System.display
Debugger
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Reactime Extension

Reactime was nominated for the Productivity Booster award at React Open Source Awards 2020.

Reactime is an open source Chrome developer tool for time travel debugging and performance monitoring in React applications. Reactime enables developers to record snapshots of application state, jump between and inspect state snapshots, and monitor performance metrics such as component render time and render frequency.

Features:

- Record Snapshots of Application State and Accessibility Tree
- Import and Export Snapshots of State
- Time-Travel Debugging
- Snapshot Series Comparison
- Component Tree Visualization
- React Router Compatibility
- Component Render Time & Frequency
- Support for Gatsby, Next.js and Remix
- TypeScript Support
- Ability to Reconnect
- Web Performance Metrics
- Tutorial Walkthrough
- Prop visualization both in color and thickness of the branches of connecting the components
- Heat map bar underneath the top menu


What’s New!

Reactime 25.0 includes a new prop visualization feature and heatmap bar for developers!
We also addressed the previously reported freezing issues on start and brought up the Jest Library in much better condition as it was before; from 20% of the tests working to more than 85% now working correctly.
Some of the UI was rearranged to be more aesthetically pleasing and render the main window bigger for the diplay of the component tree in the process.

https://medium.com/@loganjnelsen/reactime-v25-the-time-to-react-is-now-ace90e45a9c7

Troubleshooting:

Why is Reactime telling me that no React application is found?
Reactime initially runs using the dev tools global hook from the Chrome API. It takes time for Chrome to load this. The current workaround is to navigate to your Chrome Extensions and refresh Reactime. Then, navigate back to your application, refresh the page, and then within the Reactime Dev Tool, right-click and hit \"Reload Frame\".

Why do I need to have React Dev Tools enabled?
Reactime works in tandem with the React Developer Tools to access a React application's Fiber tree; under the hood, Reactime traverses the Fiber tree through the React Developer Tool's global hook, pulling all relevant information needed to display to the developer

There is a black screen instead of the Reactime extension
Try refreshing the application you want to test and refresh the DevTools by clicking the right mouse button “Reload frame”.

I found a bug in Reactime
Reactime is an open source project, and we'd love to hear from you about improving the user experience. Please read the DEVELOPER README in GitHub and create a pull request (or issue) to propose and collaborate on changes to Reactime.

By default this only our app only injects content scripts into localhost.
If you would like it to run on more websites please go to https://github.com/open-source-labs/reactime. Fork and clone the repository and change
\"matches\": [\"http://localhost/*\"] to \"matches\": [\"\"] in the manifest.json src\\extension\\build\\manifest.json
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "name": "Reactime", "version": "25.0.0", "devtools_page": "devtools.html", "description": "A Chrome extension that helps debug React applications by memorizing the state of components with every render.", "manifest_version": 3, "background": { "service_worker": "bundles/background.bundle.js" }, "icons": { "48": "assets/whiteBlackSquareIcon48.png", "128": "assets/whiteBlackSquareIcon128.png" }, "content_scripts": [ { "matches": ["http://localhost/*"], "js": ["bundles/content.bundle.js"] } ], "web_accessible_resources": [ { "resources": ["bundles/backend.bundle.js"], "matches": [""] } ], "permissions": ["contextMenus", "tabs", "activeTab", "scripting", "system.display", "debugger"], "host_permissions": [""]}
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How to download and manually install Reactime extension for Chrome

Looking for a way to install Reactime extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install Reactime extensions manually, this article outlines two simple methods to effortlessly install Reactime extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download Reactime extension and manually install through Drag &Drop

If you ever need to manually install a Reactime extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the Reactime Extension by clicking the "Download CRX" button on the website.

Look for the Reactime extension you wish to install. Go to the website and download the Reactime extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Reactime extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the Reactime extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download Reactime extension for Chrome and install in Developer Mode

This is another method to install Reactime extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the Reactime extension file

Select and download the Reactime extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the Reactime extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your Reactime extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the Reactime extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install Reactime extension in 2 ways. We hope this guide proves helpful.

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User reviews

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Andrew Byun (ID: 0000007dbee043ac) Voted 5 ★ - Updated 10/26/2023 This is a very useful tool to debug React applications! Looking forward to using this!

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Jimmy Phy (ID: 00000074740401c9) Voted 5 ★ - Updated 10/25/2023 Such an amazing developer tool that helps me debug my react application so much faster. Looking forward to any new updates that may come.

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Carlos Koulatsis (ID: 000000698f155339) Voted 4 ★ - Updated 06/21/2022 Useful tool but on the latest update it shows a random number on the browser tabs which is very annoying.

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Kris Sorensen (ID: 0000008060b86bf1) Voted 5 ★ - Updated 04/13/2022 Amazing new split feature!

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Ronald Paek (ID: 00000082967496da) Voted 5 ★ - Updated 12/09/2020 Awesome tool