# Window
The window is the basis where all other components reside.
The following example creates a simple window, of size 500x500.
```jsx
import React, { Component } from 'react';
import { render, Window, App } from 'proton-native';
class Example extends Component {
render() {
return (
);
}
}
render();
```
> Note: Window can only have one child. To have more than one child, use boxes.
## Props
* [title](#title)
* [size](#size)
* [menuBar](#menuBar)
* [margined](#margined)
* [fullscreen](#fullscreen)
* [borderless](#borderless)
* [lastWindow](#lastWindow)
* [closed](#closed)
* [onClose](#onClose)
* [onContentSizeChange](#onContentSizeChange)
## Reference
### title
The title of the window. Will be shown at the top left ribbon.
| **Type** | **Required** | **Default** |
| -------- | ------------ | ----------- |
| string | No | '' |
### size
How big the window is when the application is first started.
| **Type** | **Required** | **Default** |
| ----------------------------- | ------------ | ---------------- |
| object {h: number, w: number} | No | {h: 500, w: 500} |
### menuBar
Whether a menubar will be shown on the top of the window.
| **Type** | **Required** | **Default** |
| -------- | ------------ | ----------- |
| bool | No | true |
### margined
Whether all children will have a margin around them and the outer edge of the window.
| **Type** | **Required** | **Default** |
| -------- | ------------ | ----------- |
| bool | No | false |
### fullscreen
Whether the window will be fullscreen on start.
| **Type** | **Required** | **Default** |
| -------- | ------------ | ----------- |
| bool | No | false |
### borderless
Whether the window will have a border on the inside.
| **Type** | **Required** | **Default** |
| -------- | ------------ | ----------- |
| bool | No | false |
### lastWindow
Whether the window is the last window. If set to `true`, then the program will quit once the window is closed.
| **Type** | **Required** | **Default** |
| -------- | ------------ | ----------- |
| bool | No | true |
### closed
Whether the window is closed. If set to closed, then the window will be closed.
| **Type** | **Required** | **Default** |
| -------- | ------------ | ----------- |
| bool | No | false |
### onClose
Called when the window is closed.
| **Type** | **Required** |
| ---------- | ------------ |
| function() | No |
### onContentSizeChange
Called when the window size is changed by the user. The new size is passed as an argument, in an object.
| **Type** | **Required** |
| -------------------------------- | ------------ |
| function({h: number, y: number}) | No |