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Real talk from Dave: I, Dave Rupert, a person who cares about web performance, a person who reads web performance blogs, a person who spends lots of hours trying to keep up on best practices, a person who co-hosts a weekly podcast about making websites and speak with web performance professionals… somehow goofed and added …

In previous articles, we explained what consistency is, the difference between “strong” and “eventual” consistency, and why this distinction is more important than ever to modern application developers. We also introduced the notion of ‘consistency tax’: the extra time and effort that a development team needs to invest if they choose a system with only …

In this piece, Eric Meyer argues that performance is more important than ever right now — especially for websites that contain critical information for the public:

There’s a design trend I’ve seen popping up all over the place. Maybe you’ve seen it too. It’s this sort of thing where text is repeated over and over. A good example is the price comparison website, GoCompare, who used it in a major multi-channel advertising campaign.

Perhaps you know Unsplash? I’d wager it’s the most popular stock photography site out there for two big reasons: Every photo on there is pretty darn nice Every photo is entirely free even for commercial use. You don’t have to ask permission or even credit it (although that’s appreciated). Here’s something you might not know …

HTML5 range inputs, in supported browsers and by design, don’t show the user the actual value they are submitting. If you want to use the cool slider, but show the value, you’ll have to do that yourself. Here we use the output element and jQuery to show the current value in a bubble that hovers above the range input.

The other day I was helping my pal Jez work Dept. of Enthusiasm, the site for his newsletter, and I had a thought. What if we made the word “enthusiasm” in the title animate a little bit? Like, what if each of the letters in the word bopped up and down enthusiastically?

Deep dive from Ahmad. I like the coverage of vmin and vmax, which I think I don’t reach for as often as I should. I’m thinking that if you are doing something highly directional (e.g. a full bleed trick), then directly using vw is necessary. On the other hand, if you’re doing a calculation where …

Markdown has traditionally been a favorite format for programmers to write documentation. It’s simple enough for almost everyone to learn and adapt to while making it easy to format and style content. It was so popular that commands from Markdown have been used in chat applications like Slack and Whatsapp as document applications, like Dropbox …

By default, <input> and <textarea> elements don’t change size based on the content they contain. In fact, there isn’t any simple HTML or CSS way to make them do that. Kinda funny, as that seems like a reasonable use-case. But of course, there are ways, my friend. There are always ways.

I sure didn’t! Tomek Sułkowsi shows how we can reverse the numbering of ordered lists with a simple HTML attribute:

Lea Verou had a dang genius idea to use an emoji as a favicon. The idea only recently possible as browsers have started supporting SVG for favicons. Chuck an emoji inside an SVG <text> element and use that as the favicon.

Scrolling is something we all know and do on the web to the extent that it’s an expectation or perhaps even a habit, like brushing our teeth. That’s probably why we don’t put too much thought into designing the scrolling experience — it’s a well-known basic function. In fact, the popular “there is no fold” …

I’ve had a number of browser tabs open to articles all related to web performance and gosh darn it if blogging them is a way for me get some closure. They are all good!

I bet a lot of us tend to have the production website and the development website up simultaneously a lot. It’s almost a developer cliché at this point to make some local change, refresh, refresh, refresh, refresh, and just not see the change, only to discover you were looking at the production website, not your …

That’s not a thing. But it kinda is! Bram covers how frustrating .bar:nth-child(2) is. It’s not “select the second element of class .bar.” It’s “select the second element if it also has the class .bar.” The good news? There is a real selector that does the former: Safari only. Here are the tickets for Chrome …

In this article, we’ll cover key concepts for authenticating a user with Firebase in a real-time chat application. We’ll integrate third-party auth providers (e.g. Google, Twitter and GitHub) and, once users are signed in, we’ll learn how to store user chat data in the Firebase Realtime Database, where we can sync data with a NoSQL …

Ben Myers covers some clear examples of where CSS totally changes what some screen readers announce. For example, some screenreader will see text-transform: uppercase; on a button label that says “Add” and read it like an abbreviation, “A.D.D.” These cases of CSS messing with our screenreader announcements are initially shocking, perplexing, and maybe even appalling. …

Tyler Gaw reminds us that mask-image can repeat, resize, and move just like background-image does, which is fun to combine and play with. I could see it being a fun option for an <hr>, like Sara is doing.

I’m sure most of us have used the ol’ Wayback Machine to access some site that’s gone offline. I don’t actually know how it decides what sites to archive and when, but you can tell it to save pages. There is UI for it right on its homepage. Also, there is a little trick…

Michael Scharnagl: Ever wanted to easily convert an image to a grayscale image on your phone? I do sometimes, and that’s why I build a demo using the Web Share Target API to achieve exactly that. For this I used the Service Worker way to handle the data. Once the data is received on the …

Neumorphism (aka neomorphism) is a relatively new design trend and a term that’s gotten a good amount of buzz lately. It’s aesthetic is marked by minimal and real-looking UI that’s sort of a new take on skeuomorphism — hence the name. It got its name in a UX Collective post from December 2019, and since …

To add inline styles on an element in JSX, you have to do it in this object syntax, like: That might look a little weird to us folks who are so used to the CSS syntax, where it is font-size (not fontSize), margin-bottom (not marginBottom), and semi-colons (not commas).

This post is about understanding how Suspense works, what it does, and seeing how it can integrate into a real web app. We’ll look at how to integrate routing and data loading with Suspense in React. For routing, I’ll be using vanilla JavaScript, and I’ll be using my own micro-graphql-react GraphQL library for data.

There are very few scenarios in which an eventually consistent database is preferable over a strongly consistent database. Further, in a multi-region application scenario where scaling is necessary, choosing either an undistributed database or an eventually consistent database is even more questionable. So what motivates engineers to ignore strongly consistent distributed databases? We have seen many reasons, but wrong assumptions drive most of them.

If I need a quick background pattern to spruce something up, I often think of the CSS3 Patterns Gallery. Some of those are pretty intense but remember they are easily editable because they are just CSS. That means you could take these bold zags and chill them out.

I got myself confused about this the other day, went around searching for an answer and came up empty on finding something clear. The answer actually is quite clear and I feel a little silly for not knowing it. With it in place, like this: Mobile browsers, will play the video right where it is …

When it comes to motion and animations, there is probably nothing I love more than particles. This is why every time I explore new technologies I always end up creating demos with as many particles as I can. In this post, we’ll make even more particle magic using the Web Animations API to create a …

Chen Hui Jing notes that when you absolutely position a flex item, it’s no longer part of the flex layout. Except… it kinda is a little bit. If you make the child position: absolute; but don’t apply any top/right/bottom/left properties, then flexbox alignment will still apply to it. It’s odd to see, but it makes …

CSS has a special calc() function for doing basic math. Here’s an example: In this guide, let’s cover just about everything there is to know about this very useful function.