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16 good fundamental ideas by Jakub Linowski.…


Making Sass talk to JavaScript with JSON

The following is a guest post by Les James. Like many of us, Les has been gunning for a solution to responsive images that works for him. In this article he shares a technique he found where he can pass "named" media queries from CSS over to the JavaScript, which uses those names to swap out the image for the appropriate one for that media query. And even automate the process with Sass.

CSS-Tricks Chronicle XIV

I live to hail that season by gifted one foretold, when men shall live by reason, and not alone by gold.

Replicating Some Of Google Hangouts Chat Design

I've been using Google Hangouts a bunch. It's really pretty great. One on one or group text chat, audio, or video. Text is archived, maintains history, and is searchable. Video / audio is recordable. It works great on desktop and mobile devices and keeps them in sync. It's free. Hard to beat that.

Anyway, on a whim I decided to replicate some of the look of the chat window on desktop. Turns out there is a bunch of interesting stuff …

Speaker Notes

Rebecca Murphey with tips on speaking. While posted on “Ladies in Tech,” the advice is good for anyone.

I’ve learned that my ability to give the “elevator pitch” for a talk is a great measure of my preparedness.…

Intro to Web Workers

Brian Cooksey goes from "I don't really know what Web Workers are" to "OK I totally get Web Workers." on one short article.

...they are scripts that run in their own background thread. Independence from the regular JavaScript event loop means that a worker can churn away at something for a long time and your UI will remain responsive.…


A big collection of books on JavaScript that are published free on the web.…


IE 10 Specific Styles

Conditional comments are gone in IE 10. That's good. IE 10 is a very good browser. Feature detection is a better way to go in nearly all cases. But what if you find some styling situation where you absolutely need to target IE 10? I guess you'll have to do this.…


It's kinda like a preprocessor (variables, prefixing...) but it can do much more because it's JavaScript that executes on your page. For instance, it can give you a has selector which can test if an element contains another element or selectors that select based on simple math logic (e.g. :-math-greatest(data-price)). …


Crop Top

Sometimes you want an image to resize responsively but restrict its height — cropping it then as it widens. Here, we explore three options with various trade-offs.

Pizza Time Hovers

Hover Maester Jenn Lukas sent me a link to We agreed that 1) those are some pretty neat hovers! and 2) it's pretty cool that there is a quality website at all at a domain like - in which that she typed in randomly hoping there would be.…

Request Quest

Jake Archibald put together an interesting and informative quiz about when browsers actually make requests. I learned a bunch. Some of it might seem like quirky academic knowledge but we all know how often unpredictably weird situations come up in day to day dev work.

Jake wished me to point out that it is unfinished (only works on desktop Chrome) and might hurt your feelings if you can't take browser insult jokes.…

The “When Can I Use” Web Widget

A script from Andi Smith that injects a chart of browser support with live data from Can I Use... I really like the idea of using it on any web tech blog post - so the information about feature support stays up to date over time. I think I'll be incorporating it into this site when I get a chance.

Alexis Deveria is cool with it.

It hits a JSON file at through YQL for the data. I …


Using requestAnimationFrame

There used to be just one way to do a timed loop in JavaScript: setInterval(). If you needed to repeat something pretty fast (but not as-fast-as-absolutely-possible like a for loop), you'd use that. For the purposes of animation, the goal is sixty "frames" per second to appear smooth, so you'd run a loop like this: …


A Couple of Use Cases for Calc()

Editor's Note: A newer post with updated use cases for calc() has been published by Vincent Pickering on his blog. The use cases in this post are still relevant since they were posted in 2013, but it's nice to see an updated compilation as well.

calc() is a native CSS way to do simple math right in CSS as a replacement for any length value (or pretty much any number value). It has four simple math operators: add (+), …

Grids with text-align: justify

Patrick Kunka demos how fluid grids can be created with percentage widths and justified text. I like it because you don't need to think about gutter calculations which is what really complicates grids. If you need specific control over gutters, Don't Overthink It Grids might help. …


Sass Style Guide

With more people than ever writing in Sass, it bears some consideration how we format it. CSS style guides are common, so perhaps we can extend those to cover choices unique to Sass.

Here are some ideas that I've been gravitating toward. Perhaps they are useful to you or help you formulate ideas of your own. If you're looking for more examples, Sass Guidelines is another good place to look.…


3D Button Parallax

The following is a guest post by Alexander Futekov. We recently published an article by Joshua Bader in which a 3D inset look was adjusted as the page scrolled to give it a more realistic interaction. This is similar only Alexander is using an extruded look on buttons and employing a totally different technique.

This Website Brought To You By…

I always wanted to write something on all the technologies that a website relies on in order to have been created and work. My attempts have so far failed because it spirals out of control so quickly. Kevin Kelly sums it up:

A web page relies on perhaps a hundred thousand other inventions, all needed for its birth and continued existence. There is no web page anywhere without the inventions of HTML code, without computer programming, without LEDs or cathode …


Logic in Media Queries

Just in case you have brain farts about this constantly like I do.…


CSS-Tricks Chronicle XIII

> go east > You see a beautiful grassy field. > set up camper > You camper is now set up [roundtime: 18 seconds] > sit down


Is an open-source app modeled after CodeKit. Prepros runs on Windows where CodeKit is Mac only. From people who have tried it, it seems good.…

Chrome’s requestAutocomplete()

Auto-filling forms is nice because it saves time and is less prone to user error. Even better is not even needing to see a form in the first place.…


Replace the Image in an <img> with CSS

The following is a guest post by Marcel Shields. Marcel in a difficult place where he needed to change the image on a page but didn't have access to the HTML. Rare, but I'm sure we've all be in weird situations like this. He explains how he managed to replace that image without needing to access the HTML or JavaScript. Also turns out to be a pretty good way to replace anything with an image.


Slider with Sliding Backgrounds

Among the many super nice design features of the Yahoo! Weather app for iOS is the transition between city screens. The background image doesn't just move away as the screen moves from one screen to the next, the background image itself slides. It appears to be hiding some of the "old" screen and revealing more of the "new" screen those closer you have it to being in full view.

Let's try and pull it off on the web.…


Photo Swivel

The following is a guest post by Alex Young (@the_alexyoung). Alex has created a simple technique to "rotate" the subject of a photo simply by hiding and showing multiple stacked photographs taken at different angles. Enjoy!


Media Query Change Detection in JavaScript Through CSS Animations

The following is a guest post by Alessandro Vendruscolo. Media queries are relevant to both CSS and JS. The need and desire to manage those in one place is real. There have been some clever ways to do this, like Jeremy Keith's Conditional CSS. But in that case, the onus is on you to test after window state changes. You can get a true listener with MediaQueryList, but then you're maintaining the media queries in both places again.


Naming Media Queries

It would be pretty cool if we could do this someday in CSS. The best idea for it that I've come across is to define it in a <meta /> tag in the <head></head>. That way (perhaps) CSS could use it and JS could use it. Like window.matchMedia(nameOfMyMediaQuery) or @media (nameOfMyMediaQuery) { }. But since we can't, Sass has our back. Now the question is, how do we name them?…


Line Clampin’ (Truncating Multiple Line Text)

You want X lines of text. Anything after that, gracefully cut off. That's "line clamping" and it is a perfectly legit desire. When you can count on text being a certain number of lines, you can create stronger and more reliable grids from the elements that contain that text, as well as achieve some symmetric aesthetic harmony.

There are a couple of ways to get it done, none of them spectacular.…

How to mark up subtitles

Now that <hgroup> is gone, use a <span> inside the main header, or group them with <header> and use a <p> for the subtitle.…


3D Inset Parallax Effect

The following is a guest post by Joshua Bader. Joshua noticed that certain 3D effects on the web could benefit from adjusting perspective as the web page is scrolled. I'll let him explain.

People love to make flat things appear as if they're three-dimensional. There are two ways to pull off this effect in a 2D environment, shape and movement.

By give a flat shape the appearance of edges or sides, we can make buttons or other objects appear …


Make Client Side Data Available Server Side

UPDATE: I have a newer article "Server Side Mustard Cut" that covers this same ground and has many of the quirks worked out. That's probably a better read.

That would be pretty useful, right? Right now it's very common to User Agent "sniff" when you want to make a server-side decision about what to give the client. But UA sniffing has always sucked and sucks more every day. What you really want to know is stuff like "how big is …

WebP with Fallback

WebP images will save a quarter to a third of the file size over PNG or JPG. Not all browsers are going to support it, but Bruce Lawson shares a way we can use it in such a progressive enhancement kind of way.

Also: <img src="image.webp" onerror="this.onerror=null; this.src='image.png'">

Also: with Modernizr

The CSS-Tricks License

Sometimes people ask me if they can use the stuff they find here. So I thought I'd create a license I can refer them to. …

CSS3 Overflow

Not the most glamorous property is it? But it just might turn out to be. Things like paginated overflow and overflowing into fragments, each of which is selectable and style-able. Could be pretty powerful! Like replacing sliders with browser native controls.

The first Working Draft is out, meaning none of this is set in stone and there are no browser implementations. …


Magic Numbers in CSS

Despite the super fun sounding name, magic numbers are a bad thing. It is an old school programming term for "unnamed numerical constant". As in, just some number plunked into the code that is probably vital to things working correctly but are very difficult for anyone not intimately familiar with the code to understand what it is for. CSS is loaded with unnamed numerical constants, but they are usually paired with properties and in the context of a selector so …

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