The Amazon SDK for JavaScript v2 has reached end-of-support. We recommend that you migrate to [Amazon SDK for JavaScript v3](https://docs.amazonaws.cn//sdk-for-javascript/v3/developer-guide/). For additional details and information on how to migrate, please refer to this [announcement](https://amazonaws-china.com/blogs//developer/announcing-end-of-support-for-aws-sdk-for-javascript-v2/).

# Prerequisites
<a name="jssdk-prerequisites"></a>

Before you use the Amazon SDK for JavaScript, determine whether your code needs to run in Node.js or web browsers. After that, do the following: 
+ For Node.js, install Node.js on your servers if it is not already installed.
+ For web browsers, identify the browser versions you need to support.

**Topics**
+ [Setting Up an Amazon Node.js Environment](setting-up-node.md)
+ [Web Browsers Supported](browsers-supported.md)