mrpapercut/app.js

## app.js
/*
 * Javascript goes here
 */

## background.js
chrome.app.runtime.onLaunched.addListener(function() {
  chrome.app.window.create('index.html', {
    frame: 'none',
    outerBounds: {
      'width': 480,
      'height': 640
    },
    resizable: false
  });
});

## index.html
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title></title>
  <link href="stylesheet.css" rel="stylesheet">
  <script src="app.js"></script>
</head>
<body>
  <h1>Hello world</h1>
</body>
</html>

## manifest.json
{
  "manifest_version": 2,
  "name": "Package Calculator",
  "description": "Package calculator for calculating packages",
  "version": "0.0.1",
  "app": {
    "background": {
      "scripts": ["background.js"]
    }
  }
}

## stylesheet.css
/*
 * CSS goes here
 */
	chrome.app.runtime.onLaunched.addListener(function() {
	chrome.app.window.create('index.html', {
	frame: 'none',
	outerBounds: {
	'width': 480,
	'height': 640
	},
	resizable: false
	});
	});
	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<title></title>
	<link href="stylesheet.css" rel="stylesheet">
	<script src="app.js"></script>
	</head>
	<body>
	<h1>Hello world</h1>
	</body>
	</html>
	{
	"manifest_version": 2,
	"name": "Package Calculator",
	"description": "Package calculator for calculating packages",
	"version": "0.0.1",
	"app": {
	"background": {
	"scripts": ["background.js"]
	}
	}
	}