The Window.navigator read-only property returns a reference to the Navigator object, which can be queried for information about the application running the script.
Specifies an event listener to receive deviceproximity events. These events occur when the device sensor detects that an object becomes closer to or farther from the device.
The onvrdisplayconnected property of the SpeechSynthesis interface represents an event handler that will run when a compatible VR device has been connected to the computer (when the vrdisplayconnected event fires).
The onvrdisplaydisconnected event handler property of the Window interface is called when a compatible VR device has been disconnected from the computer (when the vrdisplaydisconnected event fires).
The onvrdisplaypresentchange property of the SpeechSynthesis interface represents an event handler that will run when the presenting state of a VR device changes — i.e. goes from presenting to not presenting, or vice versa (when the onvrdisplaypresentchange event fires).
The Web Performance API allows web pages access to certain functions for measuring the performance of web pages and web applications, including the Navigation Timing API and high-resolution time data.