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).

Get started with Node.js

This guide shows you how to initialize an NPM package, add a service client to your package, and use the JavaScript SDK to call a service action.

The scenario

Prerequisites

Before you can run the example, you must do the following:

Step 1: Set up the package structure and installing client packages

To set up the package structure and install the client packages:

Step 2: Add necessary imports and SDK code

Add the following code to a file named index.js in the nodegetstarted folder.

// This is used for getting user input.
import { createInterface } from "readline/promises";

import {
  S3Client,
  PutObjectCommand,
  CreateBucketCommand,
  DeleteObjectCommand,
  DeleteBucketCommand,
  paginateListObjectsV2,
  GetObjectCommand,
} from "@aws-sdk/client-s3";

export async function main() {
  // A region and credentials can be declared explicitly. For example
  // `new S3Client({ region: 'us-east-1', credentials: {...} })` would
  //initialize the client with those settings. However, the SDK will
  // use your local configuration and credentials if those properties
  // are not defined here.
  const s3Client = new S3Client({});

  // Create an Amazon S3 bucket. The epoch timestamp is appended
  // to the name to make it unique.
  const bucketName = `test-bucket-${Date.now()}`;
  await s3Client.send(
    new CreateBucketCommand({
      Bucket: bucketName,
    })
  );

  // Put an object into an Amazon S3 bucket.
  await s3Client.send(
    new PutObjectCommand({
      Bucket: bucketName,
      Key: "my-first-object.txt",
      Body: "Hello JavaScript SDK!",
    })
  );

  // Read the object.
  const { Body } = await s3Client.send(
    new GetObjectCommand({
      Bucket: bucketName,
      Key: "my-first-object.txt",
    })
  );

  console.log(await Body.transformToString());

  // Confirm resource deletion.
  const prompt = createInterface({
    input: process.stdin,
    output: process.stdout,
  });

  const result = await prompt.question("Empty and delete bucket? (y/n) ");
  prompt.close();

  if (result === "y") {
    // Create an async iterator over lists of objects in a bucket.
    const paginator = paginateListObjectsV2(
      { client: s3Client },
      { Bucket: bucketName }
    );
    for await (const page of paginator) {
      const objects = page.Contents;
      if (objects) {
        // For every object in each page, delete it.
        for (const object of objects) {
          await s3Client.send(
            new DeleteObjectCommand({ Bucket: bucketName, Key: object.Key })
          );
        }
      }
    }

    // Once all the objects are gone, the bucket can be deleted.
    await s3Client.send(new DeleteBucketCommand({ Bucket: bucketName }));
  }
}

// Call a function if this file was run directly. This allows the file
// to be runnable without running on import.
import { fileURLToPath } from "url";
if (process.argv[1] === fileURLToPath(import.meta.url)) {
  main();
}

The example code can be found here on GitHub.

Step 3: Run the example