Explore JavaScript testing techniques through a hands-on, no-slides demonstration. Learn to create synchronous tests, asynchronous tests with callbacks, promise-based tests, and async/await tests. Discover how to implement tests in Node.js, browser environments, and continuous integration pipelines. Gain practical insights into various testing methodologies, including unit testing, integration testing, end-to-end testing, and component testing. This 24-minute JSConf talk by Rob Richardson provides valuable knowledge to enhance your JavaScript testing toolkit, with Spanish audio available for accessibility.