npm install @chromatic-com/storybook
Visual Tests addon for Storybook
Run visual tests on your stories and compare changes with the latest baselines to catch UI regressions early in development. Supports multiple viewports, themes, and browsers.
- Chromatic account configured with access to a project
- Storybook 7.6 or later
Run the following command to install the addon and automatically configure it for your project via Storybook's CLI:
npx storybook add @chromatic-com/storybook
Start Storybook and navigate to the Visual Tests panel to run your first visual test with Chromatic!
By default, the addon offers zero-config support to run visual tests with Storybook and Chromatic. However, if you need, you can customize it by providing a few options. See the Chromatic documentation for more information on configuring and using it with your Storybook.
If you have any questions or need help with the addon, please get in touch with the Chromatic team. Sign in to your Chromatic account and click the chat icon in the bottom right corner of the screen to start a conversation with us.
We welcome contributions! If you're a maintainer, refer to the following instructions to set up your development environment with Chromatic.
Updating the GraphQL schema
The addon uses the Chromatic public GraphQL API. We rely on its schema to generate type definitions. The schema needs to be manually updated whenever it changes.
To update, take https://github.com/chromaui/chromatic/blob/main/lib/schema/public-schema.graphql and save it under
Running Storybook with the addon enabled throws an error
When installed, running Storybook may lead to the following error:
const stringWidth = require('string-width');
Error [ERR_REQUIRE_ESM]: require() of ES Module /my-project/node_modules/string-width/index.js is not supported.
This is a known issue when using an older version of the Yarn package manager (e.g., version 1.x). To solve this issue, you can upgrade to the latest stable version. However, if you cannot upgrade, adjust your
package.json file and provide a resolution field to enable the Yarn package manager to install the correct dependencies. In doing so, you may be required to delete your
node_modules directory and
yarn.lock file before installing the dependencies again.