The sizes property of the HTMLImageElement interface allows you to specify the layout width of the image for each of a list of media queries, or auto for lazy-loaded images to allow the browser to aut...

A high quality, expansive written course that will elevate your JavaScript skills to a level you never thought was achievable.

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Ever since Piccalilli started to get traction, I’ve always seen CSS-Tricks, Smashing Magazine and A List Apart (among others) as peers. We all help each other behind the scenes and importantly, back…

A behind-the-scenes look at my work on JavaScript for Everyone, from Piccalil.li.

A high quality, expansive written course that will elevate your JavaScript skills to a level you never thought was achievable.

My name is Mat Marquis, and I believe in the web.

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A high quality, expansive video course that will elevate your design skills to a level you never thought was achievable.

A high quality, expansive written course that will elevate your JavaScript skills to a level you never thought was achievable.

I've opened a shop. Come take a look!

Because I haven't published anything to it since August 31. And no one else has either. That's not a super long time to go silent but it is for a site that

There's a brand new ariaNotify() method — defined by the WAI-ARIA 1.3 Specification — that provides a means of programmatically triggering narration in a screen reader.

JavaScript for Everyone's Mat Marquis takes us on a history lesson of how document.all ended up being the only object that is falsy. Not to spoil the show, but it's IE's fault… Grab JavaScript for…

A behind-the-scenes look at my work on JavaScript for Everyone, from Piccalil.li.

The summer is over and the autumn (or fall, for our American friends) is here, so we're offering a huge 35% discount on all courses if you use the coupon code PRICEFALL at checkout.