How do I promisify the AWS JavaScript SDK?

Question

I want to use the aws-sdk in JavaScript using promises.

Instead of the default callback style:

dynamodb.getItem(params, function(err, data) {   if (err) console.log(err, err.stack); // an error occurred   else     console.log(data);           // successful response }); 

I instead want to use a promise style:

dynamoDb.putItemAsync(params).then(function(data) {   console.log(data);           // successful response }).catch(function(error) {   console.log(err, err.stack); // an error occurred }); 

Answer 1

The 2.3.0 release of the AWS JavaScript SDK added support for promises: http://aws.amazon.com/releasenotes/8589740860839559

Answer 2

I believe calls can now be appended with .promise() to promisify the given method.

You can see it start being introduced in 2.6.12 https://github.com/aws/aws-sdk-js/blob/master/CHANGELOG.md#2612

You can see an example of it's use in AWS' blog https://aws.amazon.com/blogs/compute/node-js-8-10-runtime-now-available-in-aws-lambda/

let AWS = require('aws-sdk'); let lambda = new AWS.Lambda();  exports.handler = async (event) => {     return await lambda.getAccountSettings().promise() ; };