Find out when the user's system is idle, locked, or active.
To use this API you need to have the "idle" permission.
String describing the device's idle state.
"locked"if the system is locked,
"idle"if the user has not generated any input for a specified number of seconds, or
Sets the interval used to determine when the system is in an idle state for
Fired when the system changes state.
BCD tables only load in the browser
Note: This API is based on Chromium's
chrome.idle API. This documentation is derived from
idle.json in the Chromium code.