The DataTransfer.setData() method sets the drag operation's drag data to the specified data and type. If data for the given type does not exist, it is added at the end of the drag data store, such that the last item in the types list will be the new type. If data for the given type already exists, the existing data is replaced in the same position. That is, the order of the types list is not changed when replacing data of the same type.
When a drag occurs, a translucent image is generated from the drag target (the element the dragstart event is fired at), and follows the mouse pointer during the drag. This image is created automatically, so you do not need to create it yourself. However, if a custom image is desired, the DataTransfer.setDragImage() method can be used to set the custom image to be used.
The DataTransfer.types read-only property is an array of the drag data formats (as strings) that were set in the dragstart event. The order of the formats is the same order as the data included in the drag operation.
The DedicatedWorkerGlobalScope object (the Worker global scope) is accessible through the self keyword. Some additional global functions, namespaces objects, and constructors, not typically associated with the worker global scope, but available on it, are listed in the JavaScript Reference. See also: Functions available to workers.
The postMessage() method of the DedicatedWorkerGlobalScope interface sends a message to the main thread that spawned it. This accepts a single parameter, which is the data to send to the worker. The data may be any value or JavaScript object handled by the structured clone algorithm, which includes cyclical references.
Increasingly, web-enabled devices are capable of determining their orientation; that is, they can report data indicating changes to their orientation with relation to the pull of gravity. In particular, hand-held devices such as mobile phones can use this information to automatically rotate the display to remain upright, presenting a wide-screen view of the web content when the device is rotated so that its width is greater than its height.
The DeviceLightEvent provides web developers with information from photo sensors or similiar detectors about ambient light levels near the device. For example this may be useful to adjust the screen's brightness based on the current ambient light level in order to save energy or provide better readability.
The accelerationIncludingGravity property returns the amount of acceleration recorded by the device, in meters per second squared (m/s2). Unlike DeviceMotionEvent.acceleration which compensates for the influence of gravity, its value is the sum of the acceleration of the device as induced by the user and the acceleration caused by gravity.