https://www.npmjs.com/package/copy-dynamodb-table

migrateDynamoDbTable.js

var copy = require('copy-dynamodb-table').copy
 
var globalAWSConfig = { // AWS Configuration object http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/Config.html#constructor-property
  accessKeyId: 'AKID',
  secretAccessKey: 'SECRET',
  region: 'eu-west-1'
}
 
var sourceAWSConfig = {
  accessKeyId: 'AKID',
  secretAccessKey: 'SECRET',
  region: 'eu-west-1'
}
 
var destinationAWSConfig = {
  accessKeyId: 'AKID',
  secretAccessKey: 'SECRET',
  region: 'us-west-2' // support cross zone copying
}
 
copy({
    config: globalAWSConfig,
    source: {
      tableName: 'source_table_name', // required
      config: sourceAWSConfig // optional , leave blank to use globalAWSConfig
    },
    destination: {
      tableName: 'destination_table_name', // required
      config: destinationAWSConfig // optional , leave blank to use globalAWSConfig
    },
    log: true,// default false
    create : true // create destination table if not exist
  },
  function (err, result) {
    if (err) {
      console.log(err)
    }
    console.log(result)
  })