Learn how to implement line highlighting functionality on hover events in Chart.js 4 through this 27-minute video tutorial. Master advanced techniques for detecting cursor position within the chart area, identifying tooltip triggers from specific datasets, and dynamically modifying dataset colors. Explore essential concepts including setup configuration, render initialization blocks, object destructuring, and chart area manipulation. Follow along with practical code examples and comprehensive explanations designed for developers seeking to enhance their Chart.js data visualization skills. Access supplementary materials including source code, related tutorial references, and additional Chart.js resources for both beginners and intermediate users.