electron/docs/api/power-monitor.md

powerMonitor

The power-monitor module is used to monitor power state changes. You can only use it in the main process. You should not use this module until the ready event of the app module is emitted.

For example:

app.on('ready', function() {
  require('electron').powerMonitor.on('suspend', function() {
    console.log('The system is going to sleep');
  });
});

Events

The power-monitor module emits the following events:

Event: 'suspend'

Emitted when the system is suspending.

Event: 'resume'

Emitted when system is resuming.

Event: 'on-ac'

Emitted when the system changes to AC power.

Event: 'on-battery'

Emitted when system changes to battery power.