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Reg-suit does not capture Storybook stories itself. First render your stories to image files with a compatible capture tool, then configure Reg-suit’s core.actualDir to point to those files. Reg-suit can then retrieve the prior snapshots, compare them, and publish an HTML report.
Understand the Storybook-to-Reg-suit pipeline
The Reg-suit project describes Reg-suit as “a command line interface for visual regression testing.” Its run command handles syncing expected images, comparison, and publishing; Storybook rendering and screenshot capture happen before that step. The handoff between capture and comparison is a directory of image files.
- Storybook renders stories with the project’s providers, styles, fonts, and assets.
- A capture tool opens the stories and saves image files to a directory.
- Reg-suit reads that directory through
core.actualDir, fetches the expected snapshots via a publisher plugin, compares the images, and publishes current images and a report.
See the Reg-suit project for its CLI and configuration documentation.
Check Storybook and capture-tool compatibility
Start by confirming that Storybook itself runs correctly for the project. Storybook’s setup and installation guidance notes that build configuration, runtime providers or decorators, and static assets may need project-specific setup. If a story renders differently from the application, fix its environment before using its screenshot as a baseline.
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- Compatible with Nintendo Switch 2’s new GameChat mode
- Auto-Light Balance: RightLight boosts brightness by up to 50%, reducing shadows so you look your best—compared to previous-generation Logitech webcams (1)
- Privacy with a Slide: The integrated webcam cover makes it easy to get total, reliable privacy when you're not on a video call
- Built-In Mic: The built-in microphone lets others hear you clearly during video calls
- Easy Plug-And-Play: The Brio 101 works with most video calling platforms, including Microsoft Teams, Zoom and Google Meet—no hassle; it just works
Choose a capture tool that fits the installed Storybook major version and your capture workflow. The cited Storycap README says it was tested with Storybook 7.x and 8.x. Storycapture’s Storybook integration page says it was created to support Storybook v9 with Storycap. The StoryFreeze listing describes an independent Playwright-based option for Storybook 10 that requires Node.js 22 or newer. These are source-specific compatibility statements, not guarantees for every framework and package combination; verify the tool’s current documentation and your versions before adopting it.
| Capture route | What the cited documentation describes | Check before adopting |
|---|---|---|
| Storycap | Tested with Storybook 7.x and 8.x; can capture from a running URL or a built Storybook served locally. | Confirm the project’s Storybook version and whether simple or managed capture fits your needs. |
| Storycapture integration | Created to support Storybook v9 with Storycap. | Verify the integration and package versions for your framework. |
| StoryFreeze | Independent Playwright-based tool listed for Storybook 10; requires Node.js 22 or newer. | Confirm the listing’s current status and the runtime requirement in your environment. |
Compare tools by supported Storybook version, whether they capture from a running URL or built output, per-story timing and viewport controls, browser/runtime requirements, and how their output directory maps to Reg-suit’s actualDir.
Capture Storybook stories into an image directory
With Storycap’s simple mode, start Storybook and capture its running URL. The documented default output directory is __screenshots__; use -o or --outDir to specify a different one.
npx storycap http://localhost:9001 -o __screenshots__Adjust the URL and port to match the Storybook server in your project. Storycap also documents launching a server for capture with --serverCmd:
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npx storycap http://localhost:9001 --serverCmd "<project Storybook start command>"For a built Storybook, build it to a directory, serve that directory locally, and point capture at the served URL. Use the build and serving commands appropriate to the project rather than assuming the development server reproduces the built output.
Rank #2
- Compatible with Nintendo Switch 2’s new GameChat mode
- Crisp HD 720p/30 fps video calls with diagonal 55° field of view and auto light correction. Compatible with popular platforms including Skype and Zoom.
- The built-in noise-reducing mic makes sure your voice comes across clearly up to 1.5 meters away, even if you’re in busy surroundings.
- C270’s RightLight 2 feature adjusts to lighting conditions, producing brighter, contrasted images to help you look good in all your conference calls.
- The adjustable universal clip lets you attach the camera securely to your screen or laptop, or fold the clip and set the webcam on a shelf. You’re always ready for your next video call.
Storycap’s managed mode adds storycap to the addons in .storybook/main.js and registers the withScreenshot decorator in .storybook/preview.js. It enables per-story capture options, such as delay or viewport, and can be useful when stories need explicit timing or capture behavior. Follow the capture tool’s documentation for the installed version and project configuration.
Install and initialize Reg-suit
Run the documented interactive setup from the project directory:
npx reg-suit initThe initializer installs and configures Reg-suit and the plugins you select. The README also documents prepare for configuring plugins that are already installed. Select a key-generator plugin and a publisher plugin: the key generator identifies the snapshot set to compare, while the publisher retrieves earlier images and stores current images and the report.
The Reg-suit README lists a Git-hash key generator and a simple arbitrary-string key generator, as well as publisher plugins for Amazon S3 and Google Cloud Storage. Choose a key policy that fits how your branches and CI runs should select expected snapshots, and configure the storage provider your project uses.
Point actualDir at capture output
Set core.actualDir to the directory where the capture command actually writes images. The Reg-suit README’s sample uses images; this example instead uses Storycap’s documented __screenshots__ default.
Rank #3
- 【Full HD 1080P Webcam】Powered by a 1080p FHD two-MP CMOS, the NexiGo N60 Webcam produces exceptionally sharp and clear videos at resolutions up to 1920 x 1080 with 30fps. The 3.6mm glass lens provides a crisp image at fixed distances and is optimized between 19.6 inches to 13 feet, making it ideal for almost any indoor use.
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- 【Built-in Noise-Cancelling Microphone】The built-in noise-canceling microphone reduces ambient noise to enhance the sound quality of your video. Great for Zoom / Facetime / Video Calling / OBS / Twitch / Facebook / YouTube / Conferencing / Gaming / Streaming / Recording / Online School.
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- 【Wide Compatibility】Works with USB 2.0/3.0, no additional drivers required. Ready to use in approximately one minute or less on any compatible device. Compatible with Mac OS X 10.7 and higher / Windows 7, 10 & 11, Pro / Android 4.0 or higher / Linux 2.6.24 / Chrome OS 29.0.1547 / Ubuntu Version 10.04 or above. Not compatible with XBOX/PS4/PS5.
{
"core": {
"workingDir": ".reg",
"actualDir": "__screenshots__",
"thresholdRate": 0.05
},
"plugins": {
"reg-keygen-git-hash-plugin": {},
"reg-publish-s3-plugin": {
"bucketName": "your-bucket"
}
}
}Save the configuration as regconfig.json in the location Reg-suit uses for your project. The example illustrates the configuration shape; replace the bucket value and ensure the selected plugin is installed and configured for your environment. The Reg-suit README supports environment-variable substitution in plugin configuration, which can help keep environment-specific bucket settings out of the checked-in value. Store credentials using your CI platform’s secure secrets mechanism.
Keep screenshot filenames stable across runs so Reg-suit can associate the current image for a story with its prior snapshot. If you change the capture output directory, update actualDir to match.
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Generate screenshots before invoking Reg-suit. In a local script or CI job, the essential ordering is:
- Start or build Storybook as required by the chosen capture route.
- Run the screenshot capture command and confirm it has finished writing images to the configured output directory.
- Run Reg-suit:
npx reg-suit runThe Reg-suit README documents run as equivalent to sync-expected, compare, and publish -n. The notification option sends through an installed notifier plugin. Review the resulting HTML comparison report. Treat the first published snapshots as an intentional baseline decision; do not accept them automatically without checking that the rendered stories represent the desired state.
Set comparison sensitivity deliberately
Rendering can vary because of fonts, asynchronous content, browser behavior, or antialiasing. Reg-suit provides several comparison controls; their values should reflect the stability and risk tolerance of the project, not be copied as universal defaults.
Rank #4
- 1080P Webcam with Cover for Video Calls - EMEET computer webcam provides design and Optimization for professional video streaming. Realistic 1920 x 1080p video, 5-layer anti-glare lens, providing smooth video. C960 computer camera delivers 1920x1080 video with fixed focus (11.8–118.1 inches), so as to provide a clearer image. C960 USB webcam has a cover and can be removed automatically to meet your needs for privacy. For optimal image performance, use the webcam in a well-lit environment.
- Built-in 2 Omnidirectional Mics - EMEET webcam with microphone for desktop features 2 built-in omnidirectional microphones, picking up your voice to create clear audio for communication. When installing the webcam, select EMEET C960 as the default microphone input device in your computer and video applications and select C960 as the default device in Zoom/Teams and ensure microphone permissions are enabled for proper use. Please note that C960 does not include built-in speakers.
- Automatic Light Adjustment - Automatic exposure adjustment is applied in EMEET HD webcam 1080p so that the streaming webcam can deliver stable image performance. EMEET C960 camera for computer also features color adjustment and exposure optimization to help you look your best. For optimal video quality, it is recommended to use the webcam in normal or well-lit environments and select suitable video settings in your application. Proper lighting helps achieve a clearer and more balanced image.
- Plug-and-Play & Upgraded USB Connectivity - New C960 webcam features both USB Type-A & A-to-C adapter connections for wider compatibility. For stable performance, connect the webcam directly to the computer's main USB port and ensure the device is recognized correctly. If a hub or docking station is used, please ensure it provides sufficient power and stable data transmission, as limited ports may affect performance. 90° wide-angle lens captures more participants without frequent adjustments.
- High Compatibility & Multi Application - C960 webcam for laptop is compatible with Windows 10/11, macOS 10.14+, and Android TV 7.0+. Not supported: Windows Hello, TVs, tablets, or game consoles. It works with Zoom, Teams, Facetime, Google Meet, YouTube and more. Please select C960 webcam as the default camera and microphone device in your application and ensure camera/microphone permissions are enabled, especially on macOS. (Tips: Incompatible with Windows Hello)
thresholdRateis a changed-pixel ratio from 0 to 1. The example value in the configuration is illustrative, not a general recommendation.thresholdPixelis an alternative absolute changed-pixel threshold.matchingThresholdcontrols YUV color-distance matching; smaller values make matching more sensitive.- Antialias detection can be enabled to account for antialiasing differences.
- Concurrency controls how many comparisons run at once; tune it for the project’s CI resources and workload.
Choose and document a policy so contributors understand what counts as a meaningful visual change and how to review borderline differences.
Troubleshoot common setup failures
Reg-suit reports missing or empty actual images
Check that capture completed successfully, that the output directory contains image files, and that the relative path in core.actualDir resolves from the Reg-suit configuration context. The capture command’s output path and actualDir must agree.
Every image appears different, or expected snapshots are missing
On an initial run, there may be no published baseline to retrieve. Review the report and establish the intended baseline through your project’s workflow. For later runs, check that the publisher can access the configured storage and that the selected key-generator policy points to the expected snapshot set.
Stories differ from the application or change between runs
Check runtime providers and decorators, fonts, theme setup, static assets, component data, and network-loaded resources. Ensure capture waits for the story to finish rendering; managed per-story options can set a delay or viewport where supported. Fix rendering instability before raising thresholds to hide it.
Capture fails with a version or runtime error
Verify the exact Storybook major version, capture-tool version, and browser/runtime requirements. In particular, the cited Storycap README’s tested range is Storybook 7.x and 8.x, while the cited StoryFreeze listing specifies Storybook 10 and Node.js 22 or newer. Do not assume a package configuration documented for one major version will work unchanged with another.
Best Value
- Compatible with Nintendo Switch 2’s new GameChat mode
- HD lighting adjustment and autofocus: The Logitech webcam automatically fine-tunes the lighting, producing bright, razor-sharp images even in low-light settings. This makes it a great webcam for streaming and an ideal web camera for laptop use
- Advanced capture software: Easily create and share video content with this Logitech camera that is suitable for use as a desktop computer camera or a monitor webcam
- Stereo audio with dual mics: Capture natural sound during calls and recorded videos with this 1080p webcam, great as a video conference camera or a computer webcam
- Full HD 1080p video calling and recording at 30 fps. You'll make a strong impression with this PC webcam that features crisp, clearly detailed, and vibrantly colored video
Cloud publishing fails in CI
Check that the selected publisher plugin is installed, its bucket configuration resolves correctly, and CI has access to the required credentials. Reg-suit documents environment-variable substitution in plugin configuration; the project must still provide those values securely at runtime.
Or skip the browser setup
If your goal is a screenshot of a website rather than a repeatable Storybook-story baseline, ScreenshotNeo provides a screenshot API and MCP server. It does not replace Storybook capture or Reg-suit’s snapshot comparison pipeline; it is an alternative for taking website screenshots directly.
One GET request returns an image or PDF. For example, using cURL:
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpSee the ScreenshotNeo API documentation for request options. ScreenshotNeo removes cookie banners, newsletter popups, and chat widgets before capture; bot checks, blank pages, timeouts, failed loads, and cache hits are not billed. Its MCP server gives AI agents tools to take screenshots, inspect page information, and capture PDFs. The Free plan includes 1,000 shots per month with no card; paid plans start at $5 for 3,000 shots.
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