CODE EXAMPLE FOR JAVASCRIPT

check if s3 bucket exists in lambda

// import or require aws-sdk as AWS
// const AWS = require('aws-sdk');

const checkBucketExists = async bucket => { 
  const s3 = new AWS.S3();
  const options = {
    Bucket: bucket,
  };
  try {
    await s3.headBucket(options).promise();
    return true;
  } catch (error) {
    if (error.statusCode === 404) {
      return false;
    }
    throw error;
  }
};