Canvas tutorial. <canvas> is an HTML element which can be used to draw graphics via scripting (usually JavaScript). This can, for instance, be used to draw graphs, combine photos, or create simple (and not so simple) animations. The images on this page show examples of <canvas> implementations which will be created in this tutorial. This tutorial describes how to use the <canvas> element to draw 2D graphics, starting with the basics. The HTML5 test - How well does your browser support HTML5? HTML5 Rocks - A resource for open web HTML5 developers. HTML5 Microzone. Ariya Hidayat Tracking JavaScript Annotations One of the interesting features of Esprima is to retrieve every comment inside a JavaScript source.
Even better, each comment can be linked to the related syntax node. This is very helpful since any additional information regarding the program can be provided via the comment serving as a form of annotation.