A step-by-step guide to understanding the principles underlying vector drawing, using illustrations and code demos along with interactive maps to fully exploit the JavaScript library to create a data visualization widget. Learning Raphaël JS Vector Graphics has been written for anyone with an interest in frontend browser technologies with little or no knowledge of vector graphics drawing. Designers, integrators, frontend developers, and data visualization developers will get something out of reading this book. The book assumes knowledge of HTML and CSS and a working familiarity with JavaScript.