Testing middleware
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@browserbasehq/stagehand
An AI web browsing framework focused on simplicity and extensibility.
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@vitest/browser-playwright
Browser running for Vitest using playwright
Testing Web -
browserstack
A client for working with the BrowserStack APIs.
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chai
BDD/TDD assertion library for node.js and the browser. Test framework agnostic.
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chai-as-promised
Extends Chai with assertions about promises.
Testing Web -
cypress
Cypress is a next generation front end testing tool built for the modern web
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deep-eql
Improved deep equality testing for Node.js and the browser.
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jest-preview
Preview your Jest tests in a browser
Testing Web -
msw
Seamless REST/GraphQL API mocking library for browser and Node.js.
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periscope-mcp
Web-app QA, testing & analysis for AI agents — 74 Playwright tools: authenticated flows (2FA/SSO), 25-action E2E workflows, hard assertions, session reports, and accessibility / SEO / GEO / Core-Web-Vitals + Lighthouse audits across a page or a full crawled site. Battle-tested by an AI agent on real apps.
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sinon-chai
Extends Chai with assertions for the Sinon.JS mocking framework.
Testing Web -
stably
AI-powered E2E Playwright testing CLI. Stably can understand your codebase, edit/run tests, and handle complex test scenarios for you.
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testcafe
Automated browser testing for the modern web development stack.
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vitest-preview
Visual Debugging Experience for Vitest 🧪🖼⚡️
Testing Web