jfmengels' blog

Written by Jeroen Engels, author of elm-review. If you like what you read, you can follow me on Twitter or sponsor me.

February 18, 2021

If you’ve written a little bit of Elm code, I hope you’ve tried out which allows you to write and run tests for your Elm code (if you never…

January 28, 2021

A few months ago, a colleague of mine wrote this on Slack: Thanks to elm-review I was able to remove ~7300 lines of code in the front end in…

December 22, 2020

Opaque types is a great technique in Elm. It prevents misuse of a custom type by restricting the possible operations you can apply to it…

September 29, 2020

elm-review v1 was released on September 29th 2019. Today therefore marks the first anniversary of its release! 🥳🎉 Ambitions I have pretty…

September 29, 2020

Hacktoberfest will be starting in two days, and it’s a good opportunity to get started in open-source and help out the projects you like or…

September 08, 2020

This is going to be another simultaneous release for both the CLI and the Elm package. Both bring what I think are very exciting features…

August 26, 2020

I am in the final preparations for a new (and exciting) release of , and I noticed I didn’t communicate all the changes that happened since…

May 04, 2020

Today, I will showcase a technique to single out elements from a type, through the medium of a puzzle (which you can try to solve or ignore…

April 27, 2020

In Elm, we often have modules around a data type which needs a validation when you initially create it. For instance, the package defines a…

April 08, 2020

Today I am very excited to release 2.0.0 and to share its new features! tl;dr: Here is the list of the introduced features: New review…

September 29, 2019

I am happy to announce the release of and its CLI. What is elm-review? is a tool that analyzes your project’s Elm code, and reports…

January 02, 2019

Let’s say we wanted to represent a water tap. This tap will have two knobs, one to control cold water output and another one for warm water…