electron/docs/api/browser-window.md

BrowserWindow

Create and control browser windows.

Process: Main

// In the main process.
const {BrowserWindow} = require('electron')

// Or use `remote` from the renderer process.
// const {BrowserWindow} = require('electron').remote

let win = new BrowserWindow({width: 800, height: 600})
win.on('closed', () => {
  win = null
})

// Load a remote URL
win.loadURL('https://github.com')

// Or load a local HTML file
win.loadURL(`file://${__dirname}/app/index.html`)

Frameless window

To create a window without chrome, or a transparent window in arbitrary shape, you can use the Frameless Window API.

Showing window gracefully

When loading a page in the window directly, users may see the page load incrementally, which is not a good experience for a native app. To make the window display without visual flash, there are two solutions for different situations.

Using ready-to-show event

While loading the page, the ready-to-show event will be emitted when the renderer process has rendered the page for the first time if the window has not been shown yet. Showing the window after this event will have no visual flash:

const {BrowserWindow} = require('electron')
let win = new BrowserWindow({show: false})
win.once('ready-to-show', () => {
  win.show()
})

This event is usually emitted after the did-finish-load event, but for pages with many remote resources, it may be emitted before the did-finish-load event.

Setting backgroundColor

For a complex app, the ready-to-show event could be emitted too late, making the app feel slow. In this case, it is recommended to show the window immediately, and use a backgroundColor close to your app's background:

const {BrowserWindow} = require('electron')

let win = new BrowserWindow({backgroundColor: '#2e2c29'})
win.loadURL('https://github.com')

Note that even for apps that use ready-to-show event, it is still recommended to set backgroundColor to make app feel more native.

Parent and child windows

By using parent option, you can create child windows:

const {BrowserWindow} = require('electron')

let top = new BrowserWindow()
let child = new BrowserWindow({parent: top})
child.show()
top.show()

The child window will always show on top of the top window.

Modal windows

A modal window is a child window that disables parent window, to create a modal window, you have to set both parent and modal options:

const {BrowserWindow} = require('electron')

let child = new BrowserWindow({parent: top, modal: true, show: false})
child.loadURL('https://github.com')
child.once('ready-to-show', () => {
  child.show()
})

Platform notices

• On macOS modal windows will be displayed as sheets attached to the parent window.
• On macOS the child windows will keep the relative position to parent window when parent window moves, while on Windows and Linux child windows will not move.
• On Windows it is not supported to change parent window dynamically.
• On Linux the type of modal windows will be changed to dialog.
• On Linux many desktop environments do not support hiding a modal window.

Class: BrowserWindow

Create and control browser windows.

Process: Main

BrowserWindow is an EventEmitter.

It creates a new BrowserWindow with native properties as set by the options.

new BrowserWindow([options])

• options Object (optional)
  • width Integer (optional) - Window's width in pixels. Default is 800.
  • height Integer (optional) - Window's height in pixels. Default is 600.
  • x Integer (optional) (required if y is used) - Window's left offset from screen. Default is to center the window.
  • y Integer (optional) (required if x is used) - Window's top offset from screen. Default is to center the window.
  • useContentSize Boolean (optional) - The width and height would be used as web page's size, which means the actual window's size will include window frame's size and be slightly larger. Default is false.
  • center Boolean (optional) - Show window in the center of the screen.
  • minWidth Integer (optional) - Window's minimum width. Default is 0.
  • minHeight Integer (optional) - Window's minimum height. Default is 0.
  • maxWidth Integer (optional) - Window's maximum width. Default is no limit.
  • maxHeight Integer (optional) - Window's maximum height. Default is no limit.
  • resizable Boolean (optional) - Whether window is resizable. Default is true.
  • movable Boolean (optional) - Whether window is movable. This is not implemented on Linux. Default is true.
  • minimizable Boolean (optional) - Whether window is minimizable. This is not implemented on Linux. Default is true.
  • maximizable Boolean (optional) - Whether window is maximizable. This is not implemented on Linux. Default is true.
  • closable Boolean (optional) - Whether window is closable. This is not implemented on Linux. Default is true.
  • focusable Boolean (optional) - Whether the window can be focused. Default is true. On Windows setting focusable: false also implies setting skipTaskbar: true. On Linux setting focusable: false makes the window stop interacting with wm, so the window will always stay on top in all workspaces.
  • alwaysOnTop Boolean (optional) - Whether the window should always stay on top of other windows. Default is false.
  • fullscreen Boolean (optional) - Whether the window should show in fullscreen. When explicitly set to false the fullscreen button will be hidden or disabled on macOS. Default is false.
  • fullscreenable Boolean (optional) - Whether the window can be put into fullscreen mode. On macOS, also whether the maximize/zoom button should toggle full screen mode or maximize window. Default is true.
  • skipTaskbar Boolean (optional) - Whether to show the window in taskbar. Default is false.
  • kiosk Boolean (optional) - The kiosk mode. Default is false.
  • title String (optional) - Default window title. Default is "Electron".
  • icon (NativeImage | String) (optional) - The window icon. On Windows it is recommended to use ICO icons to get best visual effects, you can also leave it undefined so the executable's icon will be used.
  • show Boolean (optional) - Whether window should be shown when created. Default is true.
  • frame Boolean (optional) - Specify false to create a Frameless Window. Default is true.
  • parent BrowserWindow (optional) - Specify parent window. Default is null.
  • modal Boolean (optional) - Whether this is a modal window. This only works when the window is a child window. Default is false.
  • acceptFirstMouse Boolean (optional) - Whether the web view accepts a single mouse-down event that simultaneously activates the window. Default is false.
  • disableAutoHideCursor Boolean (optional) - Whether to hide cursor when typing. Default is false.
  • autoHideMenuBar Boolean (optional) - Auto hide the menu bar unless the Alt key is pressed. Default is false.
  • enableLargerThanScreen Boolean (optional) - Enable the window to be resized larger than screen. Default is false.
  • backgroundColor String (optional) - Window's background color as Hexadecimal value, like #66CD00 or #FFF or #80FFFFFF (alpha is supported). Default is #FFF (white).
  • hasShadow Boolean (optional) - Whether window should have a shadow. This is only implemented on macOS. Default is true.
  • darkTheme Boolean (optional) - Forces using dark theme for the window, only works on some GTK+3 desktop environments. Default is false.
  • transparent Boolean (optional) - Makes the window transparent. Default is false.
  • type String (optional) - The type of window, default is normal window. See more about this below.
  • titleBarStyle String (optional) - The style of window title bar. Default is default. Possible values are:
    • default - Results in the standard gray opaque Mac title bar.
    • hidden - Results in a hidden title bar and a full size content window, yet the title bar still has the standard window controls ("traffic lights") in the top left.
    • hidden-inset - Results in a hidden title bar with an alternative look where the traffic light buttons are slightly more inset from the window edge.
  • thickFrame Boolean (optional) - Use WS_THICKFRAME style for frameless windows on Windows, which adds standard window frame. Setting it to false will remove window shadow and window animations. Default is true.
  • vibrancy String (optional) - Add a type of vibrancy effect to the window, only on macOS. Can be appearance-based, light, dark, titlebar, selection, menu, popover, sidebar, medium-light or ultra-dark.
  • zoomToPageWidth Boolean (optional) - Controls the behavior on macOS when option-clicking the green stoplight button on the toolbar or by clicking the Window > Zoom menu item. If true, the window will grow to the preferred width of the web page when zoomed, false will cause it to zoom to the width of the screen. This will also affect the behavior when calling maximize() directly. Default is false.
  • tabbingIdentifier String (optional) - Tab group name, allows opening the window as a native tab on macOS 10.12+. Windows with the same tabbing identifier will be grouped together.
  • webPreferences Object (optional) - Settings of web page's features.
    • devTools Boolean (optional) - Whether to enable DevTools. If it is set to false, can not use BrowserWindow.webContents.openDevTools() to open DevTools. Default is true.
    • nodeIntegration Boolean (optional) - Whether node integration is enabled. Default is true.
    • nodeIntegrationInWorker Boolean (optional) - Whether node integration is enabled in web workers. Default is false. More about this can be found in Multithreading.
    • preload String (optional) - Specifies a script that will be loaded before other scripts run in the page. This script will always have access to node APIs no matter whether node integration is turned on or off. The value should be the absolute file path to the script. When node integration is turned off, the preload script can reintroduce Node global symbols back to the global scope. See example here.
    • sandbox Boolean (optional) - If set, this will sandbox the renderer associated with the window, making it compatible with the Chromium OS-level sandbox and disabling the Node.js engine. This is not the same as the nodeIntegration option and the APIs available to the preload script are more limited. Read more about the option here. Note: This option is currently experimental and may change or be removed in future Electron releases.
    • session Session (optional) - Sets the session used by the page. Instead of passing the Session object directly, you can also choose to use the partition option instead, which accepts a partition string. When both session and partition are provided, session will be preferred. Default is the default session.
    • partition String (optional) - Sets the session used by the page according to the session's partition string. If partition starts with persist:, the page will use a persistent session available to all pages in the app with the same partition. If there is no persist: prefix, the page will use an in-memory session. By assigning the same partition, multiple pages can share the same session. Default is the default session.
    • zoomFactor Number (optional) - The default zoom factor of the page, 3.0 represents 300%. Default is 1.0.
    • javascript Boolean (optional) - Enables JavaScript support. Default is true.
    • webSecurity Boolean (optional) - When false, it will disable the same-origin policy (usually using testing websites by people), and set allowRunningInsecureContent to true if this options has not been set by user. Default is true.
    • allowRunningInsecureContent Boolean (optional) - Allow an https page to run JavaScript, CSS or plugins from http URLs. Default is false.
    • images Boolean (optional) - Enables image support. Default is true.
    • textAreasAreResizable Boolean (optional) - Make TextArea elements resizable. Default is true.
    • webgl Boolean (optional) - Enables WebGL support. Default is true.
    • webaudio Boolean (optional) - Enables WebAudio support. Default is true.
    • plugins Boolean (optional) - Whether plugins should be enabled. Default is false.
    • experimentalFeatures Boolean (optional) - Enables Chromium's experimental features. Default is false.
    • experimentalCanvasFeatures Boolean (optional) - Enables Chromium's experimental canvas features. Default is false.
    • scrollBounce Boolean (optional) - Enables scroll bounce (rubber banding) effect on macOS. Default is false.
    • blinkFeatures String (optional) - A list of feature strings separated by ,, like CSSVariables,KeyboardEventKey to enable. The full list of supported feature strings can be found in the RuntimeEnabledFeatures.json5 file.
    • disableBlinkFeatures String (optional) - A list of feature strings separated by ,, like CSSVariables,KeyboardEventKey to disable. The full list of supported feature strings can be found in the RuntimeEnabledFeatures.json5 file.
    • defaultFontFamily Object (optional) - Sets the default font for the font-family.
      • standard String (optional) - Defaults to Times New Roman.
      • serif String (optional) - Defaults to Times New Roman.
      • sansSerif String (optional) - Defaults to Arial.
      • monospace String (optional) - Defaults to Courier New.
      • cursive String (optional) - Defaults to Script.
      • fantasy String (optional) - Defaults to Impact.
    • defaultFontSize Integer (optional) - Defaults to 16.
    • defaultMonospaceFontSize Integer (optional) - Defaults to 13.
    • minimumFontSize Integer (optional) - Defaults to 0.
    • defaultEncoding String (optional) - Defaults to ISO-8859-1.
    • backgroundThrottling Boolean (optional) - Whether to throttle animations and timers when the page becomes background. Defaults to true.
    • offscreen Boolean (optional) - Whether to enable offscreen rendering for the browser window. Defaults to false. See the offscreen rendering tutorial for more details.
    • contextIsolation Boolean (optional) - Whether to run Electron APIs and the specified preload script in a separate JavaScript context. Defaults to false. The context that the preload script runs in will still have full access to the document and window globals but it will use its own set of JavaScript builtins (Array, Object, JSON, etc.) and will be isolated from any changes made to the global environment by the loaded page. The Electron API will only be available in the preload script and not the loaded page. This option should be used when loading potentially untrusted remote content to ensure the loaded content cannot tamper with the preload script and any Electron APIs being used. This option uses the same technique used by Chrome Content Scripts. You can access this context in the dev tools by selecting the 'Electron Isolated Context' entry in the combo box at the top of the Console tab. Note: This option is currently experimental and may change or be removed in future Electron releases.

When setting minimum or maximum window size with minWidth/maxWidth/ minHeight/maxHeight, it only constrains the users. It won't prevent you from passing a size that does not follow size constraints to setBounds/setSize or to the constructor of BrowserWindow.

The possible values and behaviors of the type option are platform dependent. Possible values are:

• On Linux, possible types are desktop, dock, toolbar, splash, notification.
• On macOS, possible types are desktop, textured.
  • The textured type adds metal gradient appearance (NSTexturedBackgroundWindowMask).
  • The desktop type places the window at the desktop background window level (kCGDesktopWindowLevel - 1). Note that desktop window will not receive focus, keyboard or mouse events, but you can use globalShortcut to receive input sparingly.
• On Windows, possible type is toolbar.

Instance Events

Objects created with new BrowserWindow emit the following events:

Note: Some events are only available on specific operating systems and are labeled as such.

Event: 'page-title-updated'

Returns:

• event Event
• title String

Emitted when the document changed its title, calling event.preventDefault() will prevent the native window's title from changing.

Event: 'close'

Returns:

• event Event

Emitted when the window is going to be closed. It's emitted before the beforeunload and unload event of the DOM. Calling event.preventDefault() will cancel the close.

Usually you would want to use the beforeunload handler to decide whether the window should be closed, which will also be called when the window is reloaded. In Electron, returning any value other than undefined would cancel the close. For example:

window.onbeforeunload = (e) => {
  console.log('I do not want to be closed')

  // Unlike usual browsers that a message box will be prompted to users, returning
  // a non-void value will silently cancel the close.
  // It is recommended to use the dialog API to let the user confirm closing the
  // application.
  e.returnValue = false
}

Event: 'closed'

Emitted when the window is closed. After you have received this event you should remove the reference to the window and avoid using it any more.

Event: 'unresponsive'

Emitted when the web page becomes unresponsive.

Event: 'responsive'

Emitted when the unresponsive web page becomes responsive again.

Event: 'blur'

Emitted when the window loses focus.

Event: 'focus'

Emitted when the window gains focus.

Event: 'show'

Emitted when the window is shown.

Event: 'hide'

Emitted when the window is hidden.

Event: 'ready-to-show'

Emitted when the web page has been rendered (while not being shown) and window can be displayed without a visual flash.

Event: 'maximize'

Emitted when window is maximized.

Event: 'unmaximize'

Emitted when the window exits from a maximized state.

Event: 'minimize'

Emitted when the window is minimized.

Event: 'restore'

Emitted when the window is restored from a minimized state.

Event: 'resize'

Emitted when the window is being resized.

Event: 'move'

Emitted when the window is being moved to a new position.

Note: On macOS this event is just an alias of moved.

Event: 'moved' macOS

Emitted once when the window is moved to a new position.

Event: 'enter-full-screen'

Emitted when the window enters a full-screen state.

Event: 'leave-full-screen'

Emitted when the window leaves a full-screen state.

Event: 'enter-html-full-screen'

Emitted when the window enters a full-screen state triggered by HTML API.

Event: 'leave-html-full-screen'

Emitted when the window leaves a full-screen state triggered by HTML API.

Event: 'app-command' Windows

Returns:

• event Event
• command String

Emitted when an App Command is invoked. These are typically related to keyboard media keys or browser commands, as well as the "Back" button built into some mice on Windows.

Commands are lowercased, underscores are replaced with hyphens, and the APPCOMMAND_ prefix is stripped off. e.g. APPCOMMAND_BROWSER_BACKWARD is emitted as browser-backward.

const {BrowserWindow} = require('electron')
let win = new BrowserWindow()
win.on('app-command', (e, cmd) => {
  // Navigate the window back when the user hits their mouse back button
  if (cmd === 'browser-backward' && win.webContents.canGoBack()) {
    win.webContents.goBack()
  }
})

Event: 'scroll-touch-begin' macOS

Emitted when scroll wheel event phase has begun.

Event: 'scroll-touch-end' macOS

Emitted when scroll wheel event phase has ended.

Event: 'scroll-touch-edge' macOS

Emitted when scroll wheel event phase filed upon reaching the edge of element.

Event: 'swipe' macOS

Returns:

• event Event
• direction String

Emitted on 3-finger swipe. Possible directions are up, right, down, left.

Static Methods

The BrowserWindow class has the following static methods:

BrowserWindow.getAllWindows()

Returns BrowserWindow[] - An array of all opened browser windows.

BrowserWindow.getFocusedWindow()

Returns BrowserWindow - The window that is focused in this application, otherwise returns null.

BrowserWindow.fromWebContents(webContents)

• webContents WebContents

Returns BrowserWindow - The window that owns the given webContents.

BrowserWindow.fromId(id)

• id Integer

Returns BrowserWindow - The window with the given id.

BrowserWindow.addDevToolsExtension(path)

• path String

Adds DevTools extension located at path, and returns extension's name.

The extension will be remembered so you only need to call this API once, this API is not for programming use. If you try to add an extension that has already been loaded, this method will not return and instead log a warning to the console.

The method will also not return if the extension's manifest is missing or incomplete.

Note: This API cannot be called before the ready event of the app module is emitted.

BrowserWindow.removeDevToolsExtension(name)

• name String

Remove a DevTools extension by name.

Note: This API cannot be called before the ready event of the app module is emitted.

BrowserWindow.getDevToolsExtensions()

Returns Object - The keys are the extension names and each value is an Object containing name and version properties.

To check if a DevTools extension is installed you can run the following:

const {BrowserWindow} = require('electron')

let installed = BrowserWindow.getDevToolsExtensions().hasOwnProperty('devtron')
console.log(installed)

Note: This API cannot be called before the ready event of the app module is emitted.

Instance Properties

Objects created with new BrowserWindow have the following properties:

const {BrowserWindow} = require('electron')
// In this example `win` is our instance
let win = new BrowserWindow({width: 800, height: 600})
win.loadURL('https://github.com')

win.webContents

A WebContents object this window owns. All web page related events and operations will be done via it.

See the webContents documentation for its methods and events.

win.id

A Integer representing the unique ID of the window.

Instance Methods

Objects created with new BrowserWindow have the following instance methods:

Note: Some methods are only available on specific operating systems and are labeled as such.

win.destroy()

Force closing the window, the unload and beforeunload event won't be emitted for the web page, and close event will also not be emitted for this window, but it guarantees the closed event will be emitted.

win.close()

Try to close the window. This has the same effect as a user manually clicking the close button of the window. The web page may cancel the close though. See the close event.

win.focus()

Focuses on the window.

win.blur()

Removes focus from the window.

win.isFocused()

Returns Boolean - Whether the window is focused.

win.isDestroyed()

Returns Boolean - Whether the window is destroyed.

win.show()

Shows and gives focus to the window.

win.showInactive()

Shows the window but doesn't focus on it.

win.hide()

Hides the window.

win.isVisible()

Returns Boolean - Whether the window is visible to the user.

win.isModal()

Returns Boolean - Whether current window is a modal window.

win.maximize()

Maximizes the window. This will also show (but not focus) the window if it isn't being displayed already.

win.unmaximize()

Unmaximizes the window.

win.isMaximized()

Returns Boolean - Whether the window is maximized.

win.minimize()

Minimizes the window. On some platforms the minimized window will be shown in the Dock.

win.restore()

Restores the window from minimized state to its previous state.

win.isMinimized()

Returns Boolean - Whether the window is minimized.

win.setFullScreen(flag)

• flag Boolean

Sets whether the window should be in fullscreen mode.

win.isFullScreen()

Returns Boolean - Whether the window is in fullscreen mode.

win.setAspectRatio(aspectRatio[, extraSize]) macOS

• aspectRatio Float - The aspect ratio to maintain for some portion of the content view.
• extraSize Size - The extra size not to be included while maintaining the aspect ratio.

This will make a window maintain an aspect ratio. The extra size allows a developer to have space, specified in pixels, not included within the aspect ratio calculations. This API already takes into account the difference between a window's size and its content size.

Consider a normal window with an HD video player and associated controls. Perhaps there are 15 pixels of controls on the left edge, 25 pixels of controls on the right edge and 50 pixels of controls below the player. In order to maintain a 16:9 aspect ratio (standard aspect ratio for HD @1920x1080) within the player itself we would call this function with arguments of 16/9 and [ 40, 50 ]. The second argument doesn't care where the extra width and height are within the content view--only that they exist. Just sum any extra width and height areas you have within the overall content view.

win.previewFile(path[, displayName]) macOS

• path String - The absolute path to the file to preview with QuickLook. This is important as Quick Look uses the file name and file extension on the path to determine the content type of the file to open.
• displayName String (Optional) - The name of the file to display on the Quick Look modal view. This is purely visual and does not affect the content type of the file. Defaults to path.

Uses Quick Look to preview a file at a given path.

win.closeFilePreview() macOS

Closes the currently open Quick Look panel.

win.setBounds(bounds[, animate])

• bounds Rectangle
• animate Boolean (optional) macOS

Resizes and moves the window to the supplied bounds

win.getBounds()

Returns Rectangle

win.setContentBounds(bounds[, animate])

• bounds Rectangle
• animate Boolean (optional) macOS

Resizes and moves the window's client area (e.g. the web page) to the supplied bounds.

win.getContentBounds()

Returns Rectangle

win.setSize(width, height[, animate])

• width Integer
• height Integer
• animate Boolean (optional) macOS

Resizes the window to width and height.

win.getSize()

Returns Integer[] - Contains the window's width and height.

win.setContentSize(width, height[, animate])

• width Integer
• height Integer
• animate Boolean (optional) macOS

Resizes the window's client area (e.g. the web page) to width and height.

win.getContentSize()

Returns Integer[] - Contains the window's client area's width and height.

win.setMinimumSize(width, height)

• width Integer
• height Integer

Sets the minimum size of window to width and height.

win.getMinimumSize()

Returns Integer[] - Contains the window's minimum width and height.

win.setMaximumSize(width, height)

• width Integer
• height Integer

Sets the maximum size of window to width and height.

win.getMaximumSize()

Returns Integer[] - Contains the window's maximum width and height.

win.setResizable(resizable)

• resizable Boolean

Sets whether the window can be manually resized by user.

win.isResizable()

Returns Boolean - Whether the window can be manually resized by user.

win.setMovable(movable) macOS Windows

• movable Boolean

Sets whether the window can be moved by user. On Linux does nothing.

win.isMovable() macOS Windows

Returns Boolean - Whether the window can be moved by user.

On Linux always returns true.

win.setMinimizable(minimizable) macOS Windows

• minimizable Boolean

Sets whether the window can be manually minimized by user. On Linux does nothing.

win.isMinimizable() macOS Windows

Returns Boolean - Whether the window can be manually minimized by user

On Linux always returns true.

win.setMaximizable(maximizable) macOS Windows

• maximizable Boolean

Sets whether the window can be manually maximized by user. On Linux does nothing.

win.isMaximizable() macOS Windows

Returns Boolean - Whether the window can be manually maximized by user.

On Linux always returns true.

win.setFullScreenable(fullscreenable)

• fullscreenable Boolean

Sets whether the maximize/zoom window button toggles fullscreen mode or maximizes the window.

win.isFullScreenable()

Returns Boolean - Whether the maximize/zoom window button toggles fullscreen mode or maximizes the window.

win.setClosable(closable) macOS Windows

• closable Boolean

Sets whether the window can be manually closed by user. On Linux does nothing.

win.isClosable() macOS Windows

Returns Boolean - Whether the window can be manually closed by user.

On Linux always returns true.

win.setAlwaysOnTop(flag[, level][, relativeLevel])

• flag Boolean
• level String (optional) macOS - Values include normal, floating, torn-off-menu, modal-panel, main-menu, status, pop-up-menu, screen-saver, and dock (Deprecated). The default is floating. See the macOS docs for more details.
• relativeLevel Integer (optional) macOS - The number of layers higher to set this window relative to the given level. The default is 0. Note that Apple discourages setting levels higher than 1 above screen-saver.

Sets whether the window should show always on top of other windows. After setting this, the window is still a normal window, not a toolbox window which can not be focused on.

win.isAlwaysOnTop()

Returns Boolean - Whether the window is always on top of other windows.

win.center()

Moves window to the center of the screen.

win.setPosition(x, y[, animate])

• x Integer
• y Integer
• animate Boolean (optional) macOS

Moves window to x and y.

win.getPosition()

Returns Integer[] - Contains the window's current position.

win.setTitle(title)

• title String

Changes the title of native window to title.

win.getTitle()

Returns String - The title of the native window.

Note: The title of web page can be different from the title of the native window.

win.setSheetOffset(offsetY[, offsetX]) macOS

• offsetY Float
• offsetX Float (optional)

Changes the attachment point for sheets on macOS. By default, sheets are attached just below the window frame, but you may want to display them beneath a HTML-rendered toolbar. For example:

const {BrowserWindow} = require('electron')
let win = new BrowserWindow()

let toolbarRect = document.getElementById('toolbar').getBoundingClientRect()
win.setSheetOffset(toolbarRect.height)

win.flashFrame(flag)

• flag Boolean

Starts or stops flashing the window to attract user's attention.

win.setSkipTaskbar(skip)

• skip Boolean

Makes the window not show in the taskbar.

win.setKiosk(flag)

• flag Boolean

Enters or leaves the kiosk mode.

win.isKiosk()

Returns Boolean - Whether the window is in kiosk mode.

win.getNativeWindowHandle()

Returns Buffer - The platform-specific handle of the window.

The native type of the handle is HWND on Windows, NSView* on macOS, and Window (unsigned long) on Linux.

win.hookWindowMessage(message, callback) Windows

• message Integer
• callback Function

Hooks a windows message. The callback is called when the message is received in the WndProc.

win.isWindowMessageHooked(message) Windows

• message Integer

Returns Boolean - true or false depending on whether the message is hooked.

win.unhookWindowMessage(message) Windows

• message Integer

Unhook the window message.

win.unhookAllWindowMessages() Windows

Unhooks all of the window messages.

win.setRepresentedFilename(filename) macOS

• filename String

Sets the pathname of the file the window represents, and the icon of the file will show in window's title bar.

win.getRepresentedFilename() macOS

Returns String - The pathname of the file the window represents.

win.setDocumentEdited(edited) macOS

• edited Boolean

Specifies whether the window’s document has been edited, and the icon in title bar will become gray when set to true.

win.isDocumentEdited() macOS

Returns Boolean - Whether the window's document has been edited.

win.focusOnWebView()

win.blurWebView()

win.capturePage([rect, ]callback)

• rect Rectangle (optional) - The bounds to capture
• callback Function
  • image NativeImage

Same as webContents.capturePage([rect, ]callback).

win.loadURL(url[, options])

• url String
• options Object (optional)
  • httpReferrer String (optional) - A HTTP Referrer url.
  • userAgent String (optional) - A user agent originating the request.
  • extraHeaders String (optional) - Extra headers separated by "\n"
  • postData (UploadRawData | UploadFile | UploadFileSystem | UploadBlob)[] - (optional)
  • baseURLForDataURL String (optional) - Base url (with trailing path separator) for files to be loaded by the data url. This is needed only if the specified url is a data url and needs to load other files.

Same as webContents.loadURL(url[, options]).

The url can be a remote address (e.g. http://) or a path to a local HTML file using the file:// protocol.

To ensure that file URLs are properly formatted, it is recommended to use Node's url.format method:

let url = require('url').format({
  protocol: 'file',
  slashes: true,
  pathname: require('path').join(__dirname, 'index.html')
})

win.loadURL(url)

You can load a URL using a POST request with URL-encoded data by doing the following:

win.loadURL('http://localhost:8000/post', {
  postData: [{
    type: 'rawData',
    bytes: Buffer.from('hello=world')
  }],
  extraHeaders: 'Content-Type: application/x-www-form-urlencoded'
})

win.reload()

Same as webContents.reload.

win.setMenu(menu) Linux Windows

• menu Menu

Sets the menu as the window's menu bar, setting it to null will remove the menu bar.

win.setProgressBar(progress[, options])

• progress Double
• options Object (optional)
  • mode String Windows - Mode for the progress bar. Can be none, normal, indeterminate, error, or paused.

Sets progress value in progress bar. Valid range is [0, 1.0].

Remove progress bar when progress < 0; Change to indeterminate mode when progress > 1.

On Linux platform, only supports Unity desktop environment, you need to specify the *.desktop file name to desktopName field in package.json. By default, it will assume app.getName().desktop.

On Windows, a mode can be passed. Accepted values are none, normal, indeterminate, error, and paused. If you call setProgressBar without a mode set (but with a value within the valid range), normal will be assumed.

win.setOverlayIcon(overlay, description) Windows

• overlay NativeImage - the icon to display on the bottom right corner of the taskbar icon. If this parameter is null, the overlay is cleared
• description String - a description that will be provided to Accessibility screen readers

Sets a 16 x 16 pixel overlay onto the current taskbar icon, usually used to convey some sort of application status or to passively notify the user.

win.setHasShadow(hasShadow) macOS

• hasShadow Boolean

Sets whether the window should have a shadow. On Windows and Linux does nothing.

win.hasShadow() macOS

Returns Boolean - Whether the window has a shadow.

On Windows and Linux always returns true.

win.setThumbarButtons(buttons) Windows

• buttons ThumbarButton[]

Returns Boolean - Whether the buttons were added successfully

Add a thumbnail toolbar with a specified set of buttons to the thumbnail image of a window in a taskbar button layout. Returns a Boolean object indicates whether the thumbnail has been added successfully.

The number of buttons in thumbnail toolbar should be no greater than 7 due to the limited room. Once you setup the thumbnail toolbar, the toolbar cannot be removed due to the platform's limitation. But you can call the API with an empty array to clean the buttons.

The buttons is an array of Button objects:

• Button Object
  • icon NativeImage - The icon showing in thumbnail toolbar.
  • click Function
  • tooltip String (optional) - The text of the button's tooltip.
  • flags String[] (optional) - Control specific states and behaviors of the button. By default, it is ['enabled'].

The flags is an array that can include following Strings:

• enabled - The button is active and available to the user.
• disabled - The button is disabled. It is present, but has a visual state indicating it will not respond to user action.
• dismissonclick - When the button is clicked, the thumbnail window closes immediately.
• nobackground - Do not draw a button border, use only the image.
• hidden - The button is not shown to the user.
• noninteractive - The button is enabled but not interactive; no pressed button state is drawn. This value is intended for instances where the button is used in a notification.

win.setThumbnailClip(region) Windows

• region Rectangle - Region of the window

Sets the region of the window to show as the thumbnail image displayed when hovering over the window in the taskbar. You can reset the thumbnail to be the entire window by specifying an empty region: {x: 0, y: 0, width: 0, height: 0}.

win.setThumbnailToolTip(toolTip) Windows

• toolTip String

Sets the toolTip that is displayed when hovering over the window thumbnail in the taskbar.

win.setAppDetails(options) Windows

• options Object
  • appId String (optional) - Window's App User Model ID. It has to be set, otherwise the other options will have no effect.
  • appIconPath String (optional) - Window's Relaunch Icon.
  • appIconIndex Integer (optional) - Index of the icon in appIconPath. Ignored when appIconPath is not set. Default is 0.
  • relaunchCommand String (optional) - Window's Relaunch Command.
  • relaunchDisplayName String (optional) - Window's Relaunch Display Name.

Sets the properties for the window's taskbar button.

Note: relaunchCommand and relaunchDisplayName must always be set together. If one of those properties is not set, then neither will be used.

win.showDefinitionForSelection() macOS

Same as webContents.showDefinitionForSelection().

win.setIcon(icon) Windows Linux

• icon NativeImage

Changes window icon.

win.setAutoHideMenuBar(hide)

• hide Boolean

Sets whether the window menu bar should hide itself automatically. Once set the menu bar will only show when users press the single Alt key.

If the menu bar is already visible, calling setAutoHideMenuBar(true) won't hide it immediately.

win.isMenuBarAutoHide()

Returns Boolean - Whether menu bar automatically hides itself.

win.setMenuBarVisibility(visible) Windows Linux

• visible Boolean

Sets whether the menu bar should be visible. If the menu bar is auto-hide, users can still bring up the menu bar by pressing the single Alt key.

win.isMenuBarVisible()

Returns Boolean - Whether the menu bar is visible.

win.setVisibleOnAllWorkspaces(visible)

• visible Boolean

Sets whether the window should be visible on all workspaces.

Note: This API does nothing on Windows.

win.isVisibleOnAllWorkspaces()

Returns Boolean - Whether the window is visible on all workspaces.

Note: This API always returns false on Windows.

win.setIgnoreMouseEvents(ignore)

• ignore Boolean

Makes the window ignore all mouse events.

All mouse events happened in this window will be passed to the window below this window, but if this window has focus, it will still receive keyboard events.

win.setContentProtection(enable) macOS Windows

• enable Boolean

Prevents the window contents from being captured by other apps.

On macOS it sets the NSWindow's sharingType to NSWindowSharingNone. On Windows it calls SetWindowDisplayAffinity with WDA_MONITOR.

win.setFocusable(focusable) Windows

• focusable Boolean

Changes whether the window can be focused.

win.setParentWindow(parent) Linux macOS

• parent BrowserWindow

Sets parent as current window's parent window, passing null will turn current window into a top-level window.

win.getParentWindow()

Returns BrowserWindow - The parent window.

win.getChildWindows()

Returns BrowserWindow[] - All child windows.

win.setAutoHideCursor(autoHide) macOS

• autoHide Boolean

Controls whether to hide cursor when typing.

win.setVibrancy(type) macOS

• type String - Can be appearance-based, light, dark, titlebar, selection, menu, popover, sidebar, medium-light or ultra-dark. See the macOS documentation for more details.

Adds a vibrancy effect to the browser window. Passing null or an empty string will remove the vibrancy effect on the window.

win.setTouchBar(touchBar) macOS Experimental

• touchBar TouchBar

Sets the touchBar layout for the current window. Specifying null or undefined clears the touch bar. This method only has an effect if the machine has a touch bar and is running on macOS 10.12.1+.

Note: The TouchBar API is currently experimental and may change or be removed in future Electron releases.

win.setBrowserView(browserView) Experimental

• browserView BrowserView

Note: The BrowserView API is currently experimental and may change or be removed in future Electron releases.