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:
+
+```javascript
+let top = new BrowserWindow()
+let child = new BrowserWindow({parent: top})
+```
+
+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 turn a child
+window into modal window, you need to call `win.setModal(true)`:
+
+```javascript
+let child = new BrowserWindow({parent: top, show: false})
+child.loadURL('https://github.com')
+child.setModal(true)
+child.once('ready-to-show', () => {
+ child.show()
+})
+```
+
+### Sheets
+
+On macOS it is uncommon to use modal windows for tasks, a more native way is to
+show window as sheet by calling `win.beginSheet(sheet)` API:
+
+```javascript
+let child = new BrowserWindow({show: false})
+child.loadURL('https://github.com')
+child.once('ready-to-show', () => {
+ top.beginSheet(child)
+})
+```
+
+### Platform notices
+
+* On macOS the child window will keep the relative position to parent window
+ when parent window moves, while on Windows and Linux child windows will not
+ move.
+* On macOS the `setModal` has to be called before the child window shows.
+* On Windows it is not supported to change parent window dynamically.
+* On Linux the type of modal windows will be changed to `dialog`.
+
## Class: BrowserWindow
`BrowserWindow` is an
`true`.
* `frame` Boolean - Specify `false` to create a
[Frameless Window](frameless-window.md). Default is `true`.
+ * `parent` BrowserWindow - Parent window.
* `acceptFirstMouse` Boolean - Whether the web view accepts a single
mouse-down event that simultaneously activates the window. Default is
`false`.
Returns a boolean, whether the window is visible to the user.
+### `win.setModal(modal)`
+
+* `modal` Boolean
+
+Sets current window as modal window.
+
+It can only be called for child windows.
+
+### `win.isModal()`
+
+Returns whether current window is a modal window.
+
+### `win.beginSheet(sheet)` _macOS_
+
+* `sheet` BrowserWindow
+
+Shows `sheet` as a sheet for current window, when there is already a sheet
+showing, this call will be queued.
+
+It can only be called for top-level windows.
+
+### `win.endSheet(sheet)` _macOS_
+
+* `sheet` BrowserWindow
+
+Dismisses the `sheet`.
+
### `win.maximize()`
Maximizes the window.
Changes whether the window can be focused.
[blink-feature-string]: https://cs.chromium.org/chromium/src/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in
+
+### `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 the parent window.
+
+### `win.getChildWindows()`
+
+Returns all child windows.