Access to iPhone's gyroscope from web

This week's release of iOS 4.2 for iPad and iPhone comes with some nice little features most people will not immediately become aware of as they're neither directly visible in the iOS UI nor are they mentioned in Apple's official release notes. You have to dig a little deeper to find them. One of them is a JavaScript API for the iPhone's gyroscope. Read on to see it in action and learn how to use it.Your iPhone has a number of sensors, some of which are rather essential for the phone's operation (such as the microphone). While the accelerometer and the gyroscope might not be the most essential sensors for a phone, they're certainly the most exciting ones. While accelerometer measures the acceleration you induce on the phone, the gyroscope gives a rather precise feedback on the orientation of the phone - see how to do that.