Check if S3 bucket exists using AWS SDK JavaScript Node.js

s3-bucket-exists.js

const AWS = require('aws-sdk')
const s3 = new AWS.S3()

const BUCKET_NAME = 'MyBucket'

async function main() {
  try {
    const data = await s3.headBucket({ Bucket: BUCKET_NAME }).promise()

    return `Bucket "${BUCKET_NAME}" exists`
  } catch (err) {
    if (err.statusCode === 403) {
      return `Bucket "${BUCKET_NAME}" Access Denied`
    }

    if (err.statusCode >= 400 && err.statusCode < 500) {
      return `Bucket "${BUCKET_NAME}" Not Found`
    }

    throw err
  }
}

main() // until https://github.com/tc39/proposal-top-level-await

Hey there, I think you're missing a thing here
headBucket can return 403 which indicates that a bucket exists but your access denied

so condition at line 16 is not accurate :)

Ah good catch; have updated :)

nice!!