What JavaScript frameworks have you used in your projects?

In QA Automation projects for testing web applications, the following JavaScript frameworks and libraries are often used:

• Jest — a popular unit testing framework with support for mocks and snapshots.
• Mocha — a flexible testing framework often used with Chai for assertions.
• Cypress — a modern end-to-end testing tool with a user-friendly interface and debugging capabilities.
• Puppeteer — a library for controlling Chrome browser via DevTools Protocol, suitable for UI automation.
• Playwright — similar to Puppeteer with support for multiple browsers.

The choice depends on project requirements: for quick unit tests — Jest or Mocha; for integration and e2e — Cypress or Playwright.