Storybook 9 introduces comprehensive frontend test coverage tracking that measures how much component code is exercised by stories. The new workflow allows developers to run interaction, accessibility, and visual tests with a single command, identify untested components and code branches, and quickly fill coverage gaps by generating new stories. This approach provides high coverage of UI states while being faster and more reliable than end-to-end tests, though it complements rather than replaces them for full application testing.
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Why frontend coverage mattersThe frontend coverage workflowWhere Storybook fits in your frontend testing strategyUse AI to accelerate coverageGet startedLearn moreSort: