electron/docs/browser-window.md

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## Synopsis
The `BrowserWindow` class gives you ability to create a browser window, an
example is:
```javascript
var BrowserWindow = require('browser-window');
var win = new BrowserWindow({ width: 800, height: 600, show: false });
win.on('destroyed', function() {
win = null;
});
win.loadUrl('https://github.com');
win.show();
```
**Note:** Be careful not to use `window` as the variable name.
## Class: BrowserWindow
`BrowserWindow` is an
[EventEmitter](http://nodejs.org/api/events.html#events_class_events_eventemitter).
### new BrowserWindow(options)
* `options` Object
* `x` Integer - Window's left offset to screen
* `y` Integer - Window's top offset to screen
* `center` Boolean - Show window in the center of the screen
* `min-width` Integer - Minimum width
* `min-height` Integer - Minimum height
* `max-width` Integer - Maximum width
* `max-height` Integer - Maximum height
* `resizable` Boolean - Whether window is resizable
* `always-on-top` Boolean - Whether the window should always stay on top of other windows
* `fullscreen` Boolean - Whether the window should show in fullscreen
* `kiosk` Boolean - The kiosk mode
* `title` String - Default window title
* `show` Boolean - Whether window should be shown when created
Creates a new `BrowserWindow` with native properties set by the `options`.
Usually you only need to set the `width` and `height`, other properties will
have decent default values.
### Event: 'page-title-updated'
* `event` Event
Emitted when the document changed its title, calling `event.preventDefault()`
would prevent the native window's title to change.
### Event: 'close'
* `event` Event
Emitted when the window is going to be closed. It's emitted before the
`beforeunload` and `unload` event of DOM, calling `event.preventDefault()`
would 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 atom-shell, returning an empty string or `false` would cancel the
close. An example is:
```javascript
window.onbeforeunload = function(e) {
console.log('I do not want to be closed');
// Unlike usual browsers, in which a string should be returned and the user is
// prompted to confirm the page unload. atom-shell gives the power completely
// to the developers, return empty string or false would prevent the unloading
// now. You can also use the dialog API to let user confirm it.
return false;
};
```
### Event: 'closed'
Emitted when the window is closed. At the time of this event, window is not
destroyed yet so you can still do some operations to the window (but you
shouldn't!).
### Event: 'destroyed'
Emitted when the memory taken by the native window is released. Usually you
should dereference the javascript object when received this event.
### Class Method: BrowserWindow.getFocusedWindow()
Returns the window that is focused in this application.
### Class Method: BrowserWindow.fromProcessIdAndRoutingId(processId, routingId)
* `processId` Integer
* `routingId` Integer
Find a window according to its `processId` and `routingId`.
### BrowserWindow.destroy()
Destroy the window and free the memory without closing it.
**Note:** Usually you should always call `Window.close()` to close the window,
**which will emit `beforeunload` and `unload` events for DOM. Only use
**`Window.destroy()` when the window gets into a very bad state and you want
**to force closing it.
### BrowserWindow.close()
Try to close the window, this has the same effect with user manually clicking
the close button of the window. The web page may cancel the close though, see
the [close event](window#event-close).
### BrowserWindow.focus()
Focus on the window.
### BrowserWindow.isFocused()
Returns whether the window is focused.
### BrowserWindow.show()
Shows the window.
### BrowserWindow.hide()
Hides the window.
### BrowserWindow.maximize()
Maximizes the window.
### BrowserWindow.unmaximize()
Unmaximizes the window.
### BrowserWindow.minimize()
Minimizes the window. On some platforms the minimized window will be shown in
the Dock.
### BrowserWindow.restore()
Restores the window from minimized state to its previous state.
### BrowserWindow.setFullScreen(flag)
* `flag` Boolean
Sets whether the window should be in fullscreen mode.
### BrowserWindow.isFullScreen()
Returns whether the window is in fullscreen mode.
### BrowserWindow.setSize(width, height)
* `width` Integer
* `height` Integer
Resizes the window to `width` and `height`.
### BrowserWindow.getSize()
Returns an array that contains window's width and height.
### BrowserWindow.setMinimumSize(width, height)
* `width` Integer
* `height` Integer
Sets the minimum size of window to `width` and `height`.
### BrowserWindow.getMinimumSize()
Returns an array that contains window's minimum width and height.
### BrowserWindow.setMaximumSize(width, height)
* `width` Integer
* `height` Integer
Sets the maximum size of window to `width` and `height`.
### BrowserWindow.getMaximumSize()
Returns an array that contains window's maximum width and height.
### BrowserWindow.setResizable(resizable)
* `resizable` Boolean
Sets whether the window can be manually resized by user.
### BrowserWindow.isResizable()
Returns whether the window can be manually resized by user.
### BrowserWindow.setAlwaysOnTop(flag)
* `flag` Boolean
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.
### BrowserWindow.isAlwaysOnTop()
Returns whether the window is always on top of other windows.
### BrowserWindow.center()
Moves window to the center of the screen.
### BrowserWindow.setPosition(x, y)
* `x` Integer
* `y` Integer
Moves window to `x` and `y`.
### BrowserWindow.getPosition()
Returns an array that contains window's current position.
### BrowserWindow.setTitle(title)
* `title` String
Changes the title of native window to `title`.
### BrowserWindow.getTitle()
Returns the title of the native window.
**Note:** The title of web page can be different from the title of the native
**window.
### BrowserWindow.flashFlame()
Flashes the window to attract user's attention.
### BrowserWindow.setKiosk(flag)
* `flag` Boolean
Enters or leaves the kiosk mode.
### BrowserWindow.isKiosk()
Returns whether the window is in kiosk mode.
### BrowserWindow.openDevTools()
Opens the developer tools.
### BrowserWindow.closeDevTools()
Closes the developer tools.
### BrowserWindow.inspectElement(x, y)
* `x` Integer
* `y` Integer
Starts inspecting element at position (`x`, `y`).
### BrowserWindow.focusOnWebView()
### BrowserWindow.blurWebView()
### BrowserWindow.restartHangMonitorTimeout()
### BrowserWindow.getPageTitle()
Returns the title of web page.
### BrowserWindow.isLoading()
Returns whether web page is still loading resources.
### BrowserWindow.isWaitingForResponse()
Returns whether web page is waiting for a first-response for the main resource
of the page.
### BrowserWindow.stop()
Stops any pending navigation.
### BrowserWindow.getProcessId()
Returns window's process ID. The process ID and routing ID can be used
together to locate a window.
### BrowserWindow.getRoutingId()
Returns window's routing ID. The process ID and routing ID can be used
together to locate a window.
### BrowserWindow.loadUrl(url)
* `url` URL
Loads the `url` in the window, the `url` must contains the protocol prefix,
e.g. the `http://` or `file://`.
### BrowserWindow.getUrl()
Returns URL of current web page.
### BrowserWindow.canGoBack()
Returns whether the web page can go back.
### BrowserWindow.canGoForward()
Returns whether the web page can go forward.
### BrowserWindow.canGoToOffset(offset)
* `offset` Integer
Returns whether the web page can go to `offset`.
### BrowserWindow.goBack()
Makes the web page go back.
### BrowserWindow.goForward()
Makes the web page go forward.
### BrowserWindow.goToIndex(index)
* `index` Integer
Navigates to the specified absolute index.
### BrowserWindow.goToOffset(offset)
* `offset` Integer
Navigates to the specified offset from the "current entry".
### BrowserWindow.reload()
Reloads current window.
### BrowserWindow.reloadIgnoringCache()
Reloads current window and ignores cache.