Monitor power state changes.
powerMonitor module emits the following events:
Emitted when the system is suspending.
Emitted when system is resuming.
Event: 'on-ac' macOS Windows
Emitted when the system changes to AC power.
Event: 'on-battery' macOS Windows
Emitted when system changes to battery power.
Event: 'shutdown' Linux macOS
Emitted when the system is about to reboot or shut down. If the event handler
e.preventDefault(), Electron will attempt to delay system shutdown in
order for the app to exit cleanly. If
e.preventDefault() is called, the app
should exit as soon as possible by calling something like
Event: 'lock-screen' macOS Windows
Emitted when the system is about to lock the screen.
Event: 'unlock-screen' macOS Windows
Emitted as soon as the systems screen is unlocked.
Event: 'user-did-become-active' macOS
Emitted when a login session is activated. See documentation for more information.
Event: 'user-did-resign-active' macOS
Emitted when a login session is deactivated. See documentation for more information.
powerMonitor module has the following methods:
string - The system's current state. Can be
Calculate the system idle state.
idleThreshold is the amount of time (in seconds)
before considered idle.
locked is available on supported systems only.
Integer - Idle time in seconds
Calculate system idle time in seconds.
boolean - Whether the system is on battery power.
To monitor for changes in this property, use the
boolean property. True if the system is on battery power.