No-Library (pure JS), HTML, CSS, JavaScript
This Fiddle implements a flood fill for fabric.js. The flood filled area is added as a fabric-js object to the canvas, which can then be moved around.
jQuery 1.7.2, HTML, CSS, JavaScript
http://stackoverflow.com/questions/31372456/fabric-js-cannot-get-bounding-box-to-match-its-dynamic-object
jQuery 1.11.0, HTML, CSS, JavaScript
jQuery 1.6.4, HTML, CSS, JavaScript
Raphael 1.5.2, HTML, CSS, JavaScript
Raphael JS demo for rectangle, arrow and moving rect objects.
A cicular 0 to 100% gauge with color feedback. Based on example code from here: http://stackoverflow.com/questions/5061318/drawing-centered-arcs-in-raphael-js
Circle drawing in fabricjs
This is an example of a simple free hand drawer built with HTML5 canvas.
Draws ellipse with mouse drag