An interactive tree fractal renders recursive branching strokes on an HTML Canvas. Mouse position controls branch length ratio and angle difference, redrawing the tree in real time as the pointer moves. The code scales the canvas by `window.devicePixelRatio` for high pixel density displays, using the Canvas 2D API’s `beginPath`, `lineTo`, and `stroke` to draw each segment. The fork extends an HTML5 Examples project, with a blue stroke color and fixed branching depth of eleven.