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Mercurial Tips

19.8.2019
While most of the world seems to be using git for version control, Mozilla continues to use Mercurial (hg) to manage the Firefox source code. As a git and GitHub lover, it took me a while to get used to Mercurial. I don’t consider myself a hg expert but I know enough to complete...

Data URIs

18.8.2019
We’re all familiar with traditional URI protocols like https, http, ftp, and file, but data URIs have become a large part of our online strategy. We can use them to display images, the Mac camera and webcams, and more. But what if we simply want to use a data URI to convey basic data? Typing...

The Differing Perspectives on CSS-in-JS

14.8.2019
Some people outright hate the idea of CSS-in-JS. Just that name is offensive. Hard no. Styling doesn't belong in CSS, it belongs in CSS, a thing that already exists and that browsers are optimized to use. Separation of concerns. Anything else is a laughable misstep, a sign of not learning from...

All the New ES2019 Tips and Tricks

13.8.2019
The ECMAScript standard has been updated yet again with the addition of new features in ES2019. Now officially available in node, Chrome, Firefox, and Safari you can also use Babel to compile these features to a different version of JavaScript if you need to support an older browser. Let’s look...

Design Principles for Developers: Processes and CSS Tips for Better Web Design

8.8.2019
It is technically true that anyone can cook. But there’s a difference between actually knowing how to prepare a delicious meal and hoping for the best as you throw a few ingredients in a pot. Just like web development, you might know the ingredients—<span>, background-color, .heading-1—but...

Using Immer for React State Management

7.8.2019
We make use of state to keep track of application data. States change as users interact with an application. When this happens, we need to update the state that is displayed to the user, and we do this using React’s setState. Since states are not meant to be updated directly (because React’s state...

then on Objects

5.8.2019
Promises were a revelation in JavaScript development, allowing us to enjoy async processing and avoid callback hell. Many new APIs like Battery API, Cache API, and others use the promise API. One fact you may not know is that you can add a then method to any object to make it Promise-like!...

Branching Out from the Great Divide

2.8.2019
I like the term Front-End Developer. It's encapsulates the nature of your job if your concerns are: Building UIs for web browsers The spectrum of devices and platforms those web browsers run on The people who use those web browsers and related assistive technology The breadth of knowledge...

How much specificity do @rules have, like @keyframes and @media?

31.7.2019
I got this question the other day. My first thought is: weird question! Specificity is about selectors, and at-rules are not selectors, so... irrelevant? To prove that, we can use the same selector inside and outside of an at-rule and see if it seems to affect specificity. body { background:...

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