# 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 |