Building Interactive Systems with Keyboard Events
So far in this book, our code has been very linear—it follows a straight line. First we made a cover, a shape, and a mesh, and then we added the objects to the scene. Then we moved to the next mesh, which was also added to the scene. Although it is possible to write a lot of JavaScript that looks like this, most JavaScript programs tend to be quite different.
That’s because JavaScript usually runs in a web browser. In a web browser, JavaScript code has to respond to events. A key being pressed on the keyboard, a mouse button being clicked, and the mouse pointer moving around the page are all events in the web browser. A crazy number of events can potentially happen on every web page, and for ...
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