CSS Length Units | CSS-Tricks
Overview Many CSS properties accept numbers as values. Sometimes those are whole numbers. Sometimes they’re decimals and fractions. Other times, they’re percentages. Whatever they are, the unit that follows a number determines the number’s computed length. And by “length” we mean any sort of distance that can be described as a number, such as the physical dimensions of an element, a measure of tim
Techniques for Rendering Text with WebGL | CSS-Tricks
As is the rule in WebGL, anything that seems like it should be simple is actually quite complicated. Drawing lines, debugging shaders, text rendering… they are all damn hard to do well in WebGL. Isn’t that weird? WebGL doesn’t have a built-in function for rendering text. Although text seems like the most basic of functionalities. When it comes down to actually rendering it, things get complicated.
Comparing the New Generation of Build Tools | CSS-Tricks
A bunch of new developer tools have landed in the past year and they are biting at the heels of the tools that have dominated front-end development over the last few years, including webpack, Babel, Rollup, Parcel, create-react-app. These new tools aren’t designed to perform the exact same function, and each has different things they’re trying to achieve and features to get there. Despite their di
How Do You Remove Unused CSS From a Site? | CSS-Tricks
Here’s what I’d like you to know upfront: this is a hard problem. If you’ve landed here because you’re hoping to be pointed at a tool you can run that tells you exactly what CSS you can delete from your project, well… there are tools out there, but I’m warning you to be very careful with them because none of them can ever tell you the complete story. I know what you want. You want to run the tool,
Adaptive Photo Layout with Flexbox | CSS-Tricks
Let’s take a look at a super lightweight way to create a horizontal masonry effect for a set of arbitrarily-sized photos. Throw any set of photos at it, and they will line up edge-to-edge with no gaps anywhere. The solution is not only lightweight but also quite simple. We’ll be using an unordered list of images and just 17 lines of CSS, with the heavy lifters being flexbox and object-fit. Why? I
Building a Conference Schedule with CSS Grid | CSS-Tricks
It’s hard to beat the feeling of finding a perfect use for a new technology. You can read every handy primer under the sun and ooh-and-ahh at flashy demos, but the first time you use it on your own project… that’s when things really click. I gained a new appreciation for CSS Grid when building a flexible layout for a conference schedule. The needs of the project aligned perfectly with grid’s stren
A Deep Dive into Native Lazy-Loading for Images and Frames | CSS-Tricks
Today’s websites are packed with heavy media assets like images and videos. Images make up around 50% of an average website’s traffic. Many of them, however, are never shown to a user because they’re placed way below the fold. What’s this thing about images being lazy, you ask? Lazy-loading is something that’s been covered quite a bit here on CSS-Tricks, including a thorough guide with documentati
Yet Another JavaScript Framework | CSS-Tricks
On March 6, 2018, a new bug was added to the official Mozilla Firefox browser bug tracker. A developer had noticed an issue with Mozilla’s nightly build. The report noted that a 14-day weather forecast widget typically featured on a German website had all of a sudden broken and disappeared. Nothing on the site had changed, so the problem had to be with Firefox. A screenshot of the bug report filed
Preventing Content Reflow From Lazy-Loaded Images | CSS-Tricks
You know the concept of lazy loading images. It prevents the browser from loading images until those images are in (or nearly in) the browser’s viewport. There are a plethora of JavaScript-based lazy loading solutions. GitHub has over 3,400 different lazy load repos, and those are just the ones with “lazy load” in a searchable string! Most of them rely on the same trick: Instead of putting an imag
Emulating CSS Timing Functions with JavaScript | CSS-Tricks
CSS animations and transitions are great! However, while recently toying with an idea, I got really frustrated with the fact that gradients are only animatable in Edge (and IE 10+). Yes, we can do all sorts of tricks with background-position, background-size, background-blend-mode or even opacity and transform on a pseudo-element/ child, but sometimes these are just not enough. Not to mention that
Creating a Static API from a Repository | CSS-Tricks
DigitalOcean provides cloud products for every stage of your journey. Get started with $200 in free credit! When I first started building websites, the proposition was quite basic: take content, which may or may not be stored in some form of database, and deliver it to people’s browsers as HTML pages. Over the years, countless products used that simple model to offer all-in-one solutions for conte
Simple Server Side Rendering, Routing, and Page Transitions with Nuxt.js | CSS-Tricks
Simple Server Side Rendering, Routing, and Page Transitions with Nuxt.js A bit of a wordy title, huh? What is server side rendering? What does it have to do with routing and page transitions? What the heck is Nuxt.js? Funnily enough, even though it sounds complex, working with Nuxt.js and exploring the benefits of isn’t too difficult. Let’s get started! Server side rendering You might have heard p
Form Validation Part 1: Constraint Validation in HTML | CSS-Tricks
UGURUS offers elite coaching and mentorship for agency owners looking to grow. Start with the free Agency Accelerator today. Most JavaScript form validation libraries are large, and often require other libraries like jQuery. For example, MailChimp’s embeddable form includes a 140kb validation file (minified). It includes the entire jQuery library, a third-party form validation plugin, and some cus
Fun with Viewport Units | CSS-Tricks
UGURUS offers elite coaching and mentorship for agency owners looking to grow. Start with the free Agency Accelerator today. Viewport units have been around for several years now, with near-perfect support in the major browsers, but I keep finding new and exciting ways to use them. I thought it would be fun to review the basics, and then round-up some of my favorite use-cases. What are viewport un
Mobile, Small, Portrait, Slow, Interlace, Monochrome, Coarse, Non-Hover, First | CSS-Tricks
Mobile, Small, Portrait, Slow, Interlace, Monochrome, Coarse, Non-Hover, First A month ago I explored the importance of relying on Interaction Media Features to identify the user’s ability to hover over elements or to detect the accuracy of their pointing device, meaning a fine pointer like a mouse or a coarse one like a finger. But it goes beyond the input devices or the ability to hover; the scr
Between The Lines | CSS-Tricks
DigitalOcean provides cloud products for every stage of your journey. Get started with $200 in free credit! Media queries are great for changing values in sudden snaps at different screen sizes. But, combining the power of calc() and viewport units like vw and vh , we can get an awful lot of fluidity across our layouts. For this we’ll use a technique called linear interpolation. Linear interpolati
CSS Custom Properties and Theming | CSS-Tricks
DigitalOcean provides cloud products for every stage of your journey. Get started with $200 in free credit! We posted not long ago about the difference between native CSS variables (custom properties) and preprocessor variables. There are a few esoteric things preprocessor variables can do that native variables cannot, but for the most part, native variables can do the same things. But, they are m
Notes from CSS Dev Conf 2016 | CSS-Tricks
UGURUS offers elite coaching and mentorship for agency owners looking to grow. Start with the free Agency Accelerator today. I’ve attended every single CSS Dev Conf, five years running now. I’ve always particularly enjoyed conferences that have a somewhat narrow focus. Since this conference is, no surprise, largely focused on CSS, I think it serves as an interesting state of the union of CSS style
Responsive Images In CSS | CSS-Tricks
DigitalOcean provides cloud products for every stage of your journey. Get started with $200 in free credit! The term “responsive images” has come to mean “responsive images in HTML”, in other words, the srcset and sizes attribute for <img> and the <picture> element. But how do the capabilities that these things provide map to CSS? CSS generally wasn’t really involved in the responsive images journ
Building A Website Performance Monitor | CSS-Tricks
DigitalOcean provides cloud products for every stage of your journey. Get started with $200 in free credit! A couple of months ago I wrote about using WebPageTest, and more specifically its RESTful API, to monitor the performance of a website. Unarguably, the data it provides can translate to precious information for engineers to tweak various parts of a system to make it perform better. But how e
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