Canvas tutorial
This tutorial describes how to use the <canvas> element to draw 2D graphics, starting with the basics. The examples provided should give you some clear ideas about what you can do with canvas, and will provide code snippets that may get you started in building your own content.
<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 animations.
First introduced in WebKit by Apple for the macOS Dashboard, <canvas> has since been implemented in browsers. Today, all major browsers support it.
Before you start
Using the <canvas> element is not very difficult, but you do need a basic understanding of HTML and JavaScript. The <canvas> element is not supported in some older browsers, but is supported in recent versions of all major browsers. The default size of the canvas is 300 pixels × 150 pixels (width × height). But custom sizes can be defined using the HTML height and width property. In order to draw graphics on the canvas we use a JavaScript context object, which creates graphics on the fly.
In this tutorial
See also
A note to contributors
Due to an unfortunate technical error that occurred the week of June 17, 2013, we lost the history of this tutorial, including attributions to all past contributors to its content. We apologize for this, and hope you'll forgive this unfortunate mishap.