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Detect XR Support with JavaScript
2.1.2023
A few years ago I wrote an article about how to detect VR support with JavaScript. Since that time, a whole lot has changed. “Augmented reality” became a thing and terminology has moved to “XR”, instead of VR or AR. As such, the API has needed to evolve. The presence...
Document.elementFromPoint
30.12.2022
Reacting to events with JavaScript is the foundation of a dynamic experiences on the web. Whether it’s a click event or another typical action, responding to that action is important. We started with assigning events to specific elements, then moved to event delegation for efficiency, but...
Detect Browser Bars Visibility with JavaScript
30.12.2022
It’s one thing to know about what’s in the browser document, it’s another to have insight as to the user’s browser itself. We’ve gotten past detecting which browser the user is using, and we’re now into knowing what pieces of the browser UI users are seeing....
JavaScript print Events
30.12.2022
Media queries provide a great way to programmatically change behavior depending on viewing state. We can target styles to device, pixel ratio, screen size, and even print. That said, it’s also nice to have JavaScript events that also allow us to change behavior. Did you know you’re...
How to Control CSS Animations with JavaScript
27.12.2022
When it comes to animations on the web, developers need to measure the animation’s requirements with the right technology — CSS or JavaScript. Many animations are manageable with CSS but JavaScript will always provide more control. With document.getAnimations, however, you can...
Detecting Fonts Ready
26.12.2022
Knowing when resources are loaded is a key part of building functional, elegant websites. We’re used to using the DOMContentLoaded event (commonly referred to as “domready”) but did you know there’s an event that tells you when all fonts have loaded? Let’s learn how...
WDRL — Edition 307: Test Selectors in CSS, image() functions, readable typo, and speeding up JavaScript libraries.
21.12.2022
Hey,
in my last newsletter this year, the 13th, I want to say thank you to all of you: Thanks for being my audience, for reading my emails, and articles, sharing them, and giving me feedback. I really appreciate every single email you write to me. Happy holidays and happy new year!
The web...
CSS Infinite and Circular Rotating Image Slider
2.12.2022
Image sliders (also called carousels) are everywhere. There are a lot of CSS tricks to create the common slider where the images slide from left to right (or the opposite). It’s the same deal with the many JavaScript libraries out …
CSS Infinite and Circular Rotating Image Slider originally...
Collective #739
24.11.2022
State of JavaScript 2022 Survey * An Interactive Guide to Flexbox in CSS * Design Threads
How to Internationalize Numbers with JavaScript
21.11.2022
Presenting numbers in a readable format takes many forms, from visual charts to simply adding punctuation. Those punctuation, however, are different based on internationalization. Some countries use , for decimal, while others use .. Worried about having to code for all this madness? Don’t...
How to Extend Prototypes with JavaScript
31.10.2022
One of the ideological sticking points of the first JavaScript framework was was extending prototypes vs. wrapping functions. Frameworks like MooTools and Prototype extended prototypes while jQuery and other smaller frameworks did not. Each had their benefits, but ultimately all these years later...
How to Use window.crypto in Node.js
27.10.2022
I’ve been writing a bunch of jest tests recently for libraries that use the underlying window.crypto methods like getRandomValues() and window.crypto.subtle key management methods. One problem I run into is that the window.crypto object isn’t available, so I need to shim it. To use...
Convert Fahrenheit to Celsius with JavaScript
26.10.2022
The United States is one of the last bodies that refuses to implement the Celsius temperature standard. Why? Because we’re arrogant and feel like we don’t need to change. With that said, if you code for users outside the US, it’s important to provide localized weather data...
Detect System Theme Preference Change Using JavaScript
24.10.2022
JavaScript and CSS allow users to detect the user theme preference with CSS’ prefers-color-scheme media query. It’s standard these days to use that preference to show the dark or light theme on a given website. But what if the user changes their preference while using your app?...
How to Use Storage in Web Extensions
20.10.2022
Working on a web extension is an interesting experience — you get to taste web while working with special extension APIs. One such API is storage — the web extension flavor of persistence. Let’s explore how you can use session and local storage within your Manifest V3...
Skip or Only Run a Test with JavaScript Mocha
10.10.2022
Whenever I start to feel anxiety about a big change I’m making, I start writing more unit tests. I’ll write down my fear and then write a test that attacks, and eventually relaxes, that fear. There are two actions that I’ve been frequently using with test writing: skipping all...
Jaká byla Nordic.js 2022
10.10.2022
Trvalo to tři dlouhé roky, než se mohla odehrát další iterace populárního cyklu severských frontendových konferencí Nordic.js a Nordic.design. Přinášíme reportáž přímo z místa!
Effortless JavaScript Image Editing With Pintura
3.10.2022
Learn how you can use Pintura, the robust JS image editor, to crop, resize, rotate, apply filters, or fine-tune your images
Named Element IDs Can Be Referenced as JavaScript Globals
27.9.2022
Did you know that DOM elements with IDs are accessible in JavaScript as global variables? It’s one of those things that’s been around, like, forever but I’m really digging into it for the first time.
If this is the first …
Named Element IDs Can Be Referenced as JavaScript Globals originally...
What’s New With Forms in 2022?
8.9.2022
Browsers are constantly adding new HTML, JavaScript and CSS features. Here are some useful additions to working with forms that you might have missed…
requestSubmit()
Safari 16 will be the final browser to add support for requestSubmit.
Before we …
What’s New With Forms in 2022? originally...