# BrowserWindowConstructorOptions Object

* `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. Default is `false`.
* `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) _macOS_ _Windows_ - Whether window is
  movable. This is not implemented on Linux. Default is `true`.
* `minimizable` boolean (optional) _macOS_ _Windows_ - Whether window is
  minimizable. This is not implemented on Linux. Default is `true`.
* `maximizable` boolean (optional) _macOS_ _Windows_ - Whether window is
  maximizable. This is not implemented on Linux. Default is `true`.
* `closable` boolean (optional) _macOS_ _Windows_ - 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`.
* `simpleFullscreen` boolean (optional) _macOS_ - Use pre-Lion fullscreen on
  macOS. Default is `false`.
* `skipTaskbar` boolean (optional) _macOS_ _Windows_ - Whether to show the window in taskbar.
  Default is `false`.
* `hiddenInMissionControl` boolean (optional) _macOS_ - Whether window should be hidden when the user toggles into mission control.
* `kiosk` boolean (optional) - Whether the window is in kiosk mode. Default is `false`.
* `title` string (optional) - Default window title. Default is `"Electron"`. If the HTML tag `<title>` is defined in the HTML file loaded by `loadURL()`, this property will be ignored.
* `icon` ([NativeImage](../native-image.md) | 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`.
* `paintWhenInitiallyHidden` boolean (optional) - Whether the renderer should be active when `show` is `false` and it has just been created.  In order for `document.visibilityState` to work correctly on first load with `show: false` you should set this to `false`.  Setting this to `false` will cause the `ready-to-show` event to not fire.  Default is `true`.
* `frame` boolean (optional) - Specify `false` to create a
  [frameless window](../../tutorial/window-customization.md#create-frameless-windows). 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) _macOS_ - Whether clicking an
  inactive window will also click through to the web contents. Default is
  `false` on macOS. This option is not configurable on other platforms.
* `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) _macOS_ - Enable the window to
  be resized larger than screen. Only relevant for macOS, as other OSes
  allow larger-than-screen windows by default. Default is `false`.
* `backgroundColor` string (optional) - The window's background color in Hex, RGB, RGBA, HSL, HSLA or named CSS color format. Alpha in #AARRGGBB format is supported if `transparent` is set to `true`. Default is `#FFF` (white). See [win.setBackgroundColor](../browser-window.md#winsetbackgroundcolorbackgroundcolor) for more information.
* `hasShadow` boolean (optional) - Whether window should have a shadow. Default is `true`.
* `opacity` number (optional) _macOS_ _Windows_ - Set the initial opacity of
  the window, between 0.0 (fully transparent) and 1.0 (fully opaque). This
  is only implemented on Windows and macOS.
* `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](../../tutorial/window-customization.md#create-transparent-windows).
  Default is `false`. On Windows, does not work unless the window is frameless.
* `type` string (optional) - The type of window, default is normal window. See more about
  this below.
* `visualEffectState` string (optional) _macOS_ - Specify how the material
  appearance should reflect window activity state on macOS. Must be used
  with the `vibrancy` property. Possible values are:
  * `followWindow` - The backdrop should automatically appear active when the window is active, and inactive when it is not. This is the default.
  * `active` - The backdrop should always appear active.
  * `inactive` - The backdrop should always appear inactive.
* `titleBarStyle` string (optional) _macOS_ _Windows_ - The style of window title bar.
  Default is `default`. Possible values are:
  * `default` - Results in the standard title bar for macOS or Windows respectively.
  * `hidden` - Results in a hidden title bar and a full size content window. On macOS, the window still has the standard window controls (“traffic lights”) in the top left. On Windows, when combined with `titleBarOverlay: true` it will activate the Window Controls Overlay (see `titleBarOverlay` for more information), otherwise no window controls will be shown.
  * `hiddenInset` _macOS_ - Only on macOS, results in a hidden title bar
    with an alternative look where the traffic light buttons are slightly
    more inset from the window edge.
  * `customButtonsOnHover` _macOS_ - Only on macOS, results in a hidden
    title bar and a full size content window, the traffic light buttons will
    display when being hovered over in the top left of the window.
    **Note:** This option is currently experimental.
* `trafficLightPosition` [Point](point.md) (optional) _macOS_ -
  Set a custom position for the traffic light buttons in frameless windows.
* `roundedCorners` boolean (optional) _macOS_ - Whether frameless window
  should have rounded corners on macOS. Default is `true`. Setting this property
  to `false` will prevent the window from being fullscreenable.
* `fullscreenWindowTitle` boolean (optional) _macOS_ _Deprecated_ - Shows
  the title in the title bar in full screen mode on macOS for `hiddenInset`
  titleBarStyle. Default is `false`.
* `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) _macOS_ - 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`,
  `ultra-dark`, `header`, `sheet`, `window`, `hud`, `fullscreen-ui`,
  `tooltip`, `content`, `under-window`, or `under-page`. Please note that
  `appearance-based`, `light`, `dark`, `medium-light`, and `ultra-dark` are
  deprecated and have been removed in macOS Catalina (10.15).
* `backgroundMaterial` string (optional) _Windows_ - Set the window's
  system-drawn background material, including behind the non-client area.
  Can be `auto`, `none`, `mica`, `acrylic` or `tabbed`. See [win.setBackgroundMaterial](../browser-window.md#winsetbackgroundmaterialmaterial-windows) for more information.
* `zoomToPageWidth` boolean (optional) _macOS_ - 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) _macOS_ - Tab group name, allows
  opening the window as a native tab. Windows with the same
  tabbing identifier will be grouped together. This also adds a native new
  tab button to your window's tab bar and allows your `app` and window to
  receive the `new-window-for-tab` event.
* `webPreferences` [WebPreferences](web-preferences.md?inline) (optional) - Settings of web page's features.
* `titleBarOverlay` Object | Boolean (optional) -  When using a frameless window in conjunction with `win.setWindowButtonVisibility(true)` on macOS or using a `titleBarStyle` so that the standard window controls ("traffic lights" on macOS) are visible, this property enables the Window Controls Overlay [JavaScript APIs][overlay-javascript-apis] and [CSS Environment Variables][overlay-css-env-vars]. Specifying `true` will result in an overlay with default system colors. Default is `false`.
  * `color` String (optional) _Windows_ - The CSS color of the Window Controls Overlay when enabled. Default is the system color.
  * `symbolColor` String (optional) _Windows_ - The CSS color of the symbols on the Window Controls Overlay when enabled. Default is the system color.
  * `height` Integer (optional) _macOS_ _Windows_ - The height of the title bar and Window Controls Overlay in pixels. Default is system height.

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`.
  * The `desktop` type places the window at the desktop background window level
    (kCGDesktopWindowLevel - 1). However, note that a desktop window will not
    receive focus, keyboard, or mouse events. You can still use globalShortcut to
    receive input sparingly.
  * The `dock` type creates a dock-like window behavior.
  * The `toolbar` type creates a window with a toolbar appearance.
  * The `splash` type behaves in a specific way. It is not
    draggable, even if the CSS styling of the window's body contains
    -webkit-app-region: drag. This type is commonly used for splash screens.
  * The `notification` type creates a window that behaves like a system notification.
* On macOS, possible types are `desktop`, `textured`, `panel`.
  * The `textured` type adds metal gradient appearance
    (`NSWindowStyleMaskTexturedBackground`).
  * 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.
  * The `panel` type enables the window to float on top of full-screened apps
    by adding the `NSWindowStyleMaskNonactivatingPanel` style mask,normally
    reserved for NSPanel, at runtime. Also, the window will appear on all
    spaces (desktops).
* On Windows, possible type is `toolbar`.

[overlay-css-env-vars]: https://github.com/WICG/window-controls-overlay/blob/main/explainer.md#css-environment-variables
[overlay-javascript-apis]: https://github.com/WICG/window-controls-overlay/blob/main/explainer.md#javascript-apis
