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How I discovered a cool little tip on creating string literal union types from dictionaries, and why it matters.by Gail Johnson * Feb. 09, 2026

I don’t trust AI—and I’m not trying to fix that. Instead of rejecting it or embracing it, I decided to spend a year testing how AI might support learning and creativity without skipping the thinking that makes them matter.by Gail Johnson * Jan. 01, 2026

Do you work with an API that only accept POST requests using multipart form data? This Quick Note addresses a "gotcha" that perplexed me.by Robert Banning * Sep. 10, 2025

When considering users who use a screen reader to access your site/app, you must consider both hiding and adding elements. In the rush to get to launch, it is easy to miss how we can enhance the experience of those using screen readers.by Gail Johnson * Mar. 24, 2025

Did you know you can change variables using an element's style attribute?by Gail Johnson * Mar. 03, 2025

Learn about how the CSS Stacking Context affects layering elements including ::before and ::after pseudo elements.by Robert Banning * Jan. 27, 2025

Why do we need method overloading when we can create a general method signature using union parameter types? Let's find out.by Robert Banning * Oct. 01, 2024

At first, this will seem an easy challenge as part one can be accomplished with basic Javascript functionality. Part two provides you with the opportunity to demonstrate your knowledge of accessing property on an unknown object.by Gail Johnson * Aug. 21, 2024

Challenge to analyze a bowl of jelly beans to determine the frequency of each color bean. Difficulty: mediumby Robert Banning * Jul. 23, 2024

The spread operator can give you a clone (copy) of an object, but its properties still point to the same objects. How do you create a complete true clone of an object such that no properties point to original properties? Difficulty: mediumby Wiggy * Jul. 17, 2024

Function overloading allows functions to share the same name but have different signatures (parameters) and implementations. Understanding function overloading is an essential skill in your TS toolbelt. by Robert Banning * Jun. 04, 2024

Learn why you can't extend interfaces or intersect object types with common properties in Typescript; and how you can work around this.by Robert Banning * Mar. 08, 2024

In this challenge, you will level the playing ground giving Set the ability to reduce.by Gail Johnson * Jan. 16, 2024

Interview Question: declare an input property component to hold a list of colors with the following constraints: 1) Internal and external names of the property differ. 2) Must be included in every instance. 3) May accept an array of strings or a comma-delineated string. 4) List of colors is cleaned so no duplicates.by Robert Banning * Jan. 06, 2024

We can style elements based on their parents. But how can we style parents based on their children. The :has() function solves this problem by allowing us to "look ahead".by Robert Banning * Nov. 01, 2023

I was sure this wasn't possible! Here is how you can use one function parameter as the default for another parameter. Follow up with a challenge. Difficulty: easyby Wiggy * Sep. 18, 2023

So you want to transform string elements in an array to integers and you know parseInt takes a string and converts it to an integer. So why will this fail?by Robert Banning * Jun. 06, 2023

Today, we explore a way to create Typescript types that are based on some condition. We often (usually) use `extends` to create ternary expressions allowing us to build conditional types.by Robert Banning * Mar. 17, 2023

Are you new to Typescript? This mini-introduction will get you started and hopefully spark interest in exploring more about Typescript.by Robert Banning * Feb. 28, 2023