A simple function to list all S3 objects in a given bucket

gistfile1.txt

const AWS = require('aws-sdk')
const s3 = new AWS.S3({ apiVersion: '2006-03-01', region: 'us-east-1' })
const params = {
  Bucket: 'YOUR_BUCKET_NAME'
}

/**
 * `s3.listObjects` has a max result set size of 1000. This function iterates to list all objects in the bucket.
 *
 * @example
 * const objectList = listObjects()
 *
 * @example
 * // Or inside an async function:
 * const objectList = await listObjects()
 *
 * @returns {Promise} A promise, which resolves to an array or zero or more objects.
 */
async function listObjects (lastData = []) {
  const res = await s3.listObjects(bucketParams).promise()
  const data = [...lastData, ...res.Contents]
  
  if (res.IsTruncated && (res.NextMarker || res.Contents.length > 0)) {
    params.Marker = res.NextMarker || res.Contents[res.Contents.length - 1].Key
    return listObjects(objects)
  }
  
  return data
}

// usage