Chart.js
Chart.js is an open-source JavaScript library for creating responsive, interactive, and customizable data visualizations in web applications. It uses HTML5 Canvas to render charts such as line, bar, pie, radar, and scatter plots, with built-in support for animations and tooltips. The library is lightweight, easy to integrate, and works across modern browsers without external dependencies.
Developers should learn Chart.js when they need to quickly add simple to moderately complex charts to web projects, such as dashboards, analytics tools, or data reports, without heavy overhead. It's ideal for scenarios requiring responsive designs that adapt to different screen sizes, and its straightforward API makes it accessible for beginners while offering customization options for advanced users. Use it in applications where real-time data updates and interactive elements like hover effects are beneficial.