Leejjon – Medium

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Leejjon

Migrating a Create-React-App project to Remix

Read on to learn how and why I migrated from Create-React-App to Remix.

15 min readDec 10, 2023

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Migrating a Create-React-App project to Remix

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Leejjon

Define a Node.js App Engine application in Terraform

There are currently not a lot of guides to define App Engine projects in Terraform. So I made a complete one with a full code example.

9 min readSep 1, 2023

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Define a Node.js App Engine application in Terraform

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Leejjon

Use Terraform to create an AWS Lambda function that runs your TypeScript code

In this guide, I will show you how to quickly set up infrastructure needed to deploy TypeScript code to an AWS Lambda function.

11 min readJun 27, 2023

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Use Terraform to create an AWS Lambda function that runs your TypeScript code

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Leejjon

I stopped using the useEffect hook to fetch data. React Query works, but is it easier?

Just like many, when I started to build React.js web apps I used the useEffect hook to fetch data because the (now old) documentation said…

12 min readApr 29, 2023

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I stopped using the useEffect hook to fetch data. React Query works, but is it easier?

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Leejjon

Sharing code between frontend and backend in a Full Stack TypeScript app

In this post we’ll create a React.js frontend with create-react-app and host it on a Node.js server (I have done this earlier in this…

12 min readNov 20, 2022

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Sharing code between frontend and backend in a Full Stack TypeScript app

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Leejjon

Handling Exceptions and Error responses in Java Rest Services

Handling errors nicely will inform users that something went wrong and that they should try again or wait until things have been fixed.

15 min readApr 10, 2022

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Handling Exceptions and Error responses in Java Rest Services

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Leejjon

Create a React app served by Express.js & Node.js (and add TypeScript)

I found a lot of tutorials explaining how to host React apps online. Most of them are outdated and don’t explain how you can get both…

11 min readMar 7, 2021

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Create a React app served by Express.js & Node.js (and add TypeScript)

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Leejjon

Validating JSON input in Node.js & TypeScript and cover these validation scenarios with Unit Tests

In the previous post I’ve created a sample backend with Node.js and TypeScript that can store comments via a POST call on /comments.

8 min readSep 26, 2020

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Validating JSON input in Node.js & TypeScript and cover these validation scenarios with Unit Tests

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Leejjon

Let a Node.js backend consume and produce JSON

The first thing you want to do after creating a hello world REST service is figure out how to consume and produce JSON.

7 min readSep 4, 2020

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Let a Node.js backend consume and produce JSON

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Leejjon

Build a simple rest service in Node.js using TypeScript and deploy to App Engine

There are some guides already on how to set this up. I’m going to do exactly the same, but only add the stuff that I find useful.

6 min readJul 14, 2020

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Build a simple rest service in Node.js using TypeScript and deploy to App Engine

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Leejjon

Leejjon

Java/TypeScript Developer. Interested in web/mobile/backend/database/cloud. Freelancing, only interested in job offers from employers directly. No middle men.

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