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The AWS SDK for JavaScript V3 API Reference Guide describes in detail all the API operations for the AWS SDK for JavaScript version 3 (V3).
Amazon S3 examples
Amazon Simple Storage Service (Amazon S3) is a web service that provides highly scalable cloud storage. Amazon S3 provides easy to use object storage, with a simple web service interface to store and retrieve any amount of data from anywhere on the web.

The JavaScript API for Amazon S3 is exposed through the S3
client class. For more
information about using the Amazon S3 client class, see Class: S3 in the API Reference.