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screen

Retrieve information about screen size, displays, cursor position, etc.

Process: Main, Renderer

You cannot require or use this module until the ready event of the app module is emitted.

screen is an EventEmitter.

Note: In the renderer / DevTools, window.screen is a reserved DOM property, so writing let {screen} = require('electron') will not work.

An example of creating a window that fills the whole screen:

const electron = require('electron')
const {app, BrowserWindow} = electron

let win

app.on('ready', () => {
  const {width, height} = electron.screen.getPrimaryDisplay().workAreaSize
  win = new BrowserWindow({width, height})
  win.loadURL('https://github.com')
})

Another example of creating a window in the external display:

const electron = require('electron')
const {app, BrowserWindow} = require('electron')

let win

app.on('ready', () => {
  let displays = electron.screen.getAllDisplays()
  let externalDisplay = displays.find((display) => {
    return display.bounds.x !== 0 || display.bounds.y !== 0
  })

  if (externalDisplay) {
    win = new BrowserWindow({
      x: externalDisplay.bounds.x + 50,
      y: externalDisplay.bounds.y + 50
    })
    win.loadURL('https://github.com')
  }
})

Events

The screen module emits the following events:

Event: 'display-added'

Returns:

Emitted when newDisplay has been added.

Event: 'display-removed'

Returns:

Emitted when oldDisplay has been removed.

Event: 'display-metrics-changed'

Returns:

  • event Event
  • display Display
  • changedMetrics String[]

Emitted when one or more metrics change in a display. The changedMetrics is an array of strings that describe the changes. Possible changes are bounds, workArea, scaleFactor and rotation.

Methods

The screen module has the following methods:

screen.getCursorScreenPoint()

Returns Point

The current absolute position of the mouse pointer.

screen.getMenuBarHeight() macOS

Returns Integer - The height of the menu bar in pixels.

screen.getPrimaryDisplay()

Returns Display - The primary display.

screen.getAllDisplays()

Returns Display[] - An array of displays that are currently available.

screen.getDisplayNearestPoint(point)

Returns Display - The display nearest the specified point.

screen.getDisplayMatching(rect)

Returns Display - The display that most closely intersects the provided bounds.