Debugging JavaScript is challenging due to its asynchronous nature and the variety of runtimes available, making it difficult to locate problems and reproduce issues in production environments. Traditional debugging methods such as console.log and in-browser tools can be limited by factors like source maps availability and minified code. However, error monitoring tools like Sentry's JavaScript error monitoring provide full stack traces, support for source maps, and direct integration with source code management tools to help identify the root cause of issues. These tools offer features like Issue Details pages, breadcrumbs, and Discover's query builder to provide visibility into user behavior and events leading up to errors.