Emptying / deleting all items in a DynamoDB table in TypeScript using the AWS Javascript SDK V3

deleteAllItemsInTable.ts

import { BatchWriteCommand, DynamoDBDocumentClient, paginateScan } from '@aws-sdk/lib-dynamodb'
import { DynamoDBClient } from '@aws-sdk/client-dynamodb'

function filterKeys<T extends object>(object: T, keyPredicate: (key: string) => boolean) {
  return object ? Object.fromEntries(Object.entries(object).filter(([key]) => keyPredicate(key))) : object
}

function selectKeys<T extends object>(object: T, keys: string[]) {
  return filterKeys(object, (key) => keys.includes(key))
}

export async function deleteAllItemsInTable(tableName: string, keyFields: string[]) {
  const client = DynamoDBDocumentClient.from(new DynamoDBClient({}))

  for await (const page of paginateScan({ client, pageSize: 25 }, { TableName: tableName })) {
    process.stdout.write('.')
    const items = page.Items
    if (items) {
      await client.send(
        new BatchWriteCommand({
          RequestItems: {
            [tableName]: items.map((item) => ({
              DeleteRequest: {
                Key: selectKeys(item, keyFields)
              }
            }))
          }
        })
      )
    }
  }
}
  
// Example:
// deleteAllItemsInTable('my-table-name', ['PK', 'SK'])