# AWS STS code examples for the SDK for JavaScript (v3)

## Overview

Shows how to use the AWS SDK for JavaScript (v3) to work with AWS Security Token Service (AWS STS).

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_AWS STS creates and provides trusted users with temporary security credentials that can control access to your AWS resources._

## ⚠ Important

* Running this code might result in charges to your AWS account. For more details, see [AWS Pricing](https://aws.amazon.com/pricing/) and [Free Tier](https://aws.amazon.com/free/).
* Running the tests might result in charges to your AWS account.
* We recommend that you grant your code least privilege. At most, grant only the minimum permissions required to perform the task. For more information, see [Grant least privilege](https://docs.aws.amazon.com/IAM/latest/UserGuide/best-practices.html#grant-least-privilege).
* This code is not tested in every AWS Region. For more information, see [AWS Regional Services](https://aws.amazon.com/about-aws/global-infrastructure/regional-product-services).

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## Code examples

### Prerequisites

For prerequisites, see the [README](../../README.md#Prerequisites) in the `javascriptv3` folder.


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### Single actions

Code excerpts that show you how to call individual service functions.

- [AssumeRole](libs/client.js#L4)


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## Run the examples

### Instructions

**Note**: All code examples are written in ECMAscript 6 (ES6). For guidelines on converting to CommonJS, see
[JavaScript ES6/CommonJS syntax](https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/sdk-examples-javascript-syntax.html).

**Run a single action**

```bash
node ./actions/<fileName>
```

**Run a scenario**

Most scenarios can be run with the following command:
```bash
node ./scenarios/<fileName>
```

**Run with options**

Some actions and scenarios can be run with options from the command line:
```bash
node ./scenarios/<fileName> --option1 --option2
```
[util.parseArgs](https://nodejs.org/api/util.html#utilparseargsconfig) is used to configure
these options. For the specific options available to each script, see the `parseArgs` usage
for that file.

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### Tests

⚠ Running tests might result in charges to your AWS account.


To find instructions for running these tests, see the [README](../../README.md#Tests)
in the `javascriptv3` folder.



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## Additional resources

- [AWS STS User Guide](https://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_temp.html)
- [AWS STS API Reference](https://docs.aws.amazon.com/STS/latest/APIReference/welcome.html)
- [SDK for JavaScript (v3) AWS STS reference](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/sts)

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SPDX-License-Identifier: Apache-2.0