String to bucket in javascript

string_to_bucket.js

const putS3StringObject = async (bucket, key, str) => {
  try {
    const s3 = new aws_sdk_1.S3();
    const buf = Buffer.from(str);
    await s3.putObject({
      Key: key,
      Bucket: bucket,
      Body: buf,
      ContentEncoding: 'base64'
    }).promise();
  } catch (err) {
    throw new Error(`Error putting object: ${err.message}`);
  }
}