Explore end-to-end JavaScript testing with Cypress in this comprehensive 9-hour course. Learn Cypress architecture, installation, and create your first test. Compare Cypress to Selenium, understanding pros and cons. Dive into folder hierarchy, viewports, and command-line execution. Master handling service unavailability and exceptions. Set up IntelliSense for Cypress API in Visual Studio Code. Practice with get(), find(), and within() methods, including assertions. Simulate browser navigation, handle page reloads, dropdowns, and mouse-over events. Implement reusable commands and file uploads. Generate Mochawesome HTML reports. Delve into API automation with GET, POST, PUT, and DELETE calls, API chaining, and JSON value passing. Explore API interception, spying, mocking, and stubbing. Finally, tackle OAuth 2.0 API testing using Cypress and Postman, including refresh token handling.