Published in Level Up Coding

·1 day ago

Please stop including color names in your CSS classes.

This is a very silly class name: .button-blue Also silly (from Tailwind): .bg-red-900 By specifying the color name in the class name itself, you are partially defeating the purpose of having a class at all. If the brand team decides to change the default button color from blue to green…

CSS

3 min read

Please stop including color names in your CSS classes.

CSS

3 min read

Published in JavaScript in Plain English

·Oct 14

How to Fetch Data After User Input With react-query

Most examples of react-query, the most widely used query package for React, describe how to run the query as soon as the component is mounted, but what if you want to wait to run your query until some action takes place? Wait until an action/input happens before fetching react-query data In this example, we’ll only fetch data when a…

React

2 min read

React

2 min read

Sep 30

TypeScript type for setTimeout or setInterval timers

I was recently working on a TypeScript project where I had to store an array of timers so that I could reference them later (and call clearTimeout on them) There’s no Timer type in TypeScript, so I was a bit confused at first as to which type to use in…

Typescript

1 min read

Typescript

1 min read

Sep 29

npm debug module not showing any messages in the browser? Here’s why

The debug module is very useful for avoiding console.log output in your code, and it is compatible with both NodeJS and the browser. …

Nodejs

1 min read

Nodejs

1 min read

Published in Level Up Coding

·Sep 29

Changing my approach to dependency injection in a React app

I was recently inspired by the posts below to incorporate a form of dependency injection into a ReactJS application using React Context. React Context for Dependency Injection Not State Management In discussions of React application architecture, React Context is often brought up as a way to implement "State…blog.testdouble.com Dependency Injection /Services pattern for React (inspired by Angular) Having worked in an Angular-development team for several years, it was exciting for me to learn React and it's more…dev.to

Reactjs

2 min read

Changing my approach to dependency injection in a React app

Reactjs

2 min read

Sep 19

Mocking scrollHeight and getBoundingClientRect in Jest

I needed to create tests for a method that determined the proper height of a dynamic element, using either scrollHeight if it’s available (scrollHeight is zero for inline elements) and, if not, falling back to getBoundingClientRect() Here’s how to mock them both: scrollHeight: getBoundingClientRect():

Java Script

1 min read

Java Script

1 min read

Mocking scrollHeight and getBoundingClientRect in Jest

I needed to create tests for a method that determined the proper height of a dynamic element, using either scrollHeight if it’s available (scrollHeight is zero for inline elements) and, if not, falling back to getBoundingClientRect()

Here’s how to mock them both:

scrollHeight:

scrollHeight is a property so we use the ‘get’ parameter in spyOn

getBoundingClientRect():

returns a new DOMRect() object to mimic the getBoundingClientRect function

Sep 11

Testing raw or static HTML in Jest with TypeScript

I wanted to write Jest tests for some fairly basic DOM reading/manipulation functions. So I thought I’d just create a static HTML file to serve as a fixture, then read that into my test. Initially, I tried to use raw-loader and/or asset loaders in my webpack config, but I could…

Jest

1 min read

Jest

1 min read

Sep 11

Loading custom modules in TypeScript 4

I was trying to set up a raw HTML fixture to run Jest tests on some DOM manipulation functions, and I ran into difficulty getting TypeScript to load my custom modules. It seemed that no matter what I did, I received the following error: Could not find a declaration file …

Java Script

2 min read

Java Script

2 min read

May 5, 2020

Three Phrases to use in Difficult Conversations

In the early days of my management career, I dreaded having difficult or potentially confrontational conversations with my team. …

Leadership

4 min read

Three Phrases to use in Difficult Conversations

Leadership

4 min read

May 4, 2020

Today is not Lion Day

It wasn’t without precedent: receiving a phone call from my younger brother at quarter past five in the morning. An opportunistic jet-setter and legendary partier, he would, on occasion, lose track of time after one too many beers or simply forget that timezones exist. Still, the sight of his name…

Grief

4 min read

Grief

4 min read

Please stop including color names in your CSS classes.

How to Fetch Data After User Input With react-query

TypeScript type for setTimeout or setInterval timers

npm debug module not showing any messages in the browser? Here’s why

Changing my approach to dependency injection in a React app

Mocking scrollHeight and getBoundingClientRect in Jest

Mocking scrollHeight and getBoundingClientRect in Jest

Testing raw or static HTML in Jest with TypeScript

Loading custom modules in TypeScript 4

Three Phrases to use in Difficult Conversations

Today is not Lion Day

Jim Keller