In the next ten minutes, you are going to understand how HOCs in React work. You will find out how you can write your own and how to compose them. Understanding higher-order components (HOCs) is crucial if you want to become or consider yourself an advanced React developer. If you…

In this tutorial, you are going to learn how to use Amplify’s env command. We will walk through an example where two people collaborate on an Amplify project. Note: This article was first posted on my blog. I publish each article two weeks later on Medium. You might want to…

In this tutorial, you are going to learn how you can trigger a Lambda function on authentication events with AWS Amplify. We are going to add users to a group to make specific data read-only for everyone but its owner. Note: This article was first posted on my blog. I…

You are going to learn how to write unit tests for Lambda functions. We are going to write integration tests, too, and use test-driven development to write our tests. We will break our express app into small modules to make its units composable and testable. Note: This article was first…

In this tutorial, you are going to learn how to get the user who calls the AWS Lambda function. We are going to use function composition for Express middleware to pass the user to all requests. Note: This article was first posted on my blog. I publish each article two…

In this tutorial you are going to learn the answers to the questions: “What is an arrow function in JavaScript?” and “How is an arrow function different to a regular function (keyword)?” Note: This article was first posted on my blog. I publish each article two weeks later on Medium…

|| and && (often) don't return booleans. They behave differently than you might think. Do you use them for conditional rendering in React? In this article, you are going to learn what's going on. Note: This article was first posted on my blog. I publish each article two weeks later…

In this tutorial, you are going to learn how you can execute queries and mutations in a Lambda function on an AppSync GraphQL API. We are going to use the Amplify framework to generate our code, but the solutions here work whether you use Amplify, or Serverless or something else. …

Is the 1000 item limit in AWS Amplify hindering you from building your application? In this tutorial, you are going to learn how to use DynamoDB’s Scan operation to query all items from a given table. Note: This article was first posted on my blog. I publish each article two…