Now that you have a working environment set up, let's get started and create a simple bar chart. You can type in the code as we go along, but you can also download the full working examples from the GitHub repository for this chapter. Each screenshot and code listing in this book contains a reference to the file used to produce it.
Creating a simple bar chart
Setting up the graphics context
Charts are displayed inside the graphics context provided by an HTML Canvas object. There are many ways to create one; the simplest way is to use plain HTML. Place a <canvas> element somewhere inside <body>. It should have an ID attribute, as follows:
<canvas id="my-bar-chart" width="200" height=...
