Setting up WebGL within an HTML5 page
To provide a “window” for WebGL to use for rendering, you first create an HTML5 Canvas element within your Web page. Example B.2 demonstrates creating a 512 × 512-sized Canvas with a blue background. In the case that the browser doesn’t support WebGL, a simple page stating the browser doesn’t support Canvas elements is shown. In the example, we name the Canvas gl-canvas by setting its id attribute. We’ll use its id later when we initialize WebGL.
Example B.2. Creating an HTML5 Canvas Element
<html><style type="text/css"> canvas { background: blue; }</style><body><canvas id="gl-canvas" width="512" height="512"> Oops ... your browser doesn’t support HTML5’s Canvas elements!
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