Node.js handle dynamoDb batch write limit

index.js

const R = require('ramda')
const aws = require('aws-sdk')
const batchWriteToDb = async (tableName, data) => {
  const dynamoDb = new aws.DynamoDB({
    maxRetries: 999
  })
  const docClient = new aws.DynamoDB.DocumentClient({
    service: dynamoDb,
    convertEmptyValues: true
  })
  const dataSegments = R.splitEvery(25, data)
  // dynamoDb can only write 25 items once
  for (let i = 0; i < dataSegments.length; i++) {
    const segment = dataSegments[i]
    const params = {
      RequestItems: {
        [tableName]: segment.map(item => ({
          PutRequest: {
            Item: item
          }
        }))
      }
    }
    try {
      let response = await docClient.batchWrite(params).promise()
      while (!R.isEmpty(response.UnprocessedItems)) {
        const count = response.UnprocessedItems[tableName].length
        console.log(`${count} unprocessed item(s) left, retrying...`)
        const params = {
          RequestItems: response.UnprocessedItems
        }
        response = await docClient.batchWrite(params)
      }
    } catch (error) {
      console.log(error, error.stack)
    }
  }
}