dropbox/docs/tutorials/Getting started.md

The Dropbox JavaScript SDK is a lightweight, promise based interface to the Dropbox v2 API that works in both nodejs and browser environments.

Once the Dropbox SDK for JavaScript is installed. You'll be able to make
requests using the
[Dropbox](https://dropbox.github.io/dropbox-sdk-js/Dropbox.html) or [DropboxTeam](https://dropbox.github.io/dropbox-sdk-js/DropboxTeam.html) class. The way you access these classes depends on how you've installed the package.

### When installed with CommonJS (Node.js)
Both classes are available as separated requires as most users require only the [Dropbox](https://dropbox.github.io/dropbox-sdk-js/Dropbox.html) class.
```javascript
var Dropbox = require('dropbox').Dropbox;
var DropboxTeam = require('dropbox').DropboxTeam;
```

### When using jspm or an ECMAScript transpiler (Babel)
An ES6 Module exports the Classes separately from the package in a number of ways to support variety of differences between package managers and precompilers.
```javascript
import { Dropbox } from 'dropbox';
import Dropbox from 'dropbox/dropbox';
import DropboxTeam from 'dropbox';
import { DropboxTeam } from 'dropbox';
```

### Using the UMD module via the browser
The [Dropbox](https://dropbox.github.io/dropbox-sdk-js/Dropbox.html) and [DropboxTeam](https://dropbox.github.io/dropbox-sdk-js/DropboxTeam.html) classes are available on the global window object as window.Dropbox.Dropbox and window.Dropbox.DropboxTeam.
```html
<script src="https://unpkg.com/dropbox/dist/Dropbox-sdk.min.js"></script>
<script src="https://unpkg.com/dropbox/dist/DropboxTeam-sdk.min.js"></script>
```

On the web and on most modern browsers, `fetch` should be available ([List of supported browsers](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API#Browser_compatibility)).  Otherwise, use the polyfill below (for example), or use an npm package such as `whatwg-fetch`.
```html
<!-- Optional. -->
<script src="https://cdn.jsdelivr.net/npm/promise-polyfill@7/dist/polyfill.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/fetch/2.0.3/fetch.js"></script>
```

## Authentication
Next, you'll need to learn how to authorize your requests with [Authentication](https://dropbox.github.io/dropbox-sdk-js/tutorial-Authentication.html).