Detailed sample code explaining how to obtain the angle information of the mobile phone's gyroscope in HTML5

html5Event, deviceorientation event, this event is an event when detecting changes in device orientation. Its commonly used attributes are alpha(x), beta(y), and gamma(z).

By default, the phone is vertical and the front (90 degrees) is facing you

alpha: rotate left and right

beta: rotate forward and backward

gamma: twist (rotation)

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