canvas-history canvas-history is a nice extension for HTML5 apps that perform drawing. canvas-history extends the 2D drawing context of the canvas, giving access to easy undo and redo. Getting started * include the javascript Code: // To save the current state of the canvas (e.g. onmouseup) context.saveHistory(); // To undo context.undo(); // To redo context.redo(); // To adjust the maximum size of the history context.setHistorySize(15); // Default 10 // To get the maximum size of the history context.getHistorySize(); Demo: http://niiden.com/canvas-history/ MIT Licensed