Konva.js - JavaScript 2d canvas framework

Built-in in support for HDPI devices with pixel ratio optimizations for sharp text and shapes Object Oriented API Node nesting and event bubbling High performance event detection via color map hashing Layering support Node caching to improve draw performance Nodes can be converted into data URLs, image data, or image objects Animation support Tween support Drag and drop with configurable constraints and bounds Filters Ready to use shapes including rectangles, circles, images, text, lines, polygons, SVG paths, and more Custom shapes Event driven architecture which enables developers to subscribe to attr change events, layer draw events, and more Serialization & de-serialization Selector support e.g. stage.get('#foo') and layer.get('.bar'); Desktop and mobile events AMD support Custom hit regions and more...