Explore advanced user interface algorithms in this JSConf 2014 talk by Mark DiMarco. Delve into the complexities of seemingly simple UI elements like dropdown menus and bar graphs, and discover how to overcome common usability challenges. Learn about predicting user intentions through mouse speed and direction calculations, and master techniques for determining hit states across numerous non-uniform UI elements. Gain insights into step-by-step procedures for implementing these algorithms in JavaScript, enhancing the overall user experience. Apply these concepts to everyday interface patterns and elevate your web development skills.