CSS Grids have been around a long time. Often they come bundled in frameworks such as Bootstrap. I'm not a Bootstrap hater, but sometimes using a framework is overkill if all you really need is a grid. Here's how to make your own CSS Grids from scratch.

Centering in CSS is a pain in the ass. There seems to be a gazillion ways to do it, depending on a variety of factors. This consolidates them and gives you the code you need for each situation.

Let’s harness the power of these new media queries to serve an image of the right size based on the device a user views our site on. We’re going to save a lot of bandwidth for the small devices, and serve a beautiful large image for larger ones.

We’ll do that by using the HTML5 picture element and its powerful source tag and media and srcset attributes.

For years, we’ve known what’s been weighing down our responsive pages: images. Huge ones, specially catered to huge screens, which we’ve been sending to everyone. We’ve known how to fix this problem for a while too: let us send different sources to different clients. New markup allows us to do exactly that. srcset lets us offer multiple versions of an image to browsers, which, with a little help from sizes, pick the most appropriate source to load out of the bunch. picture and source let us step in and exert a bit more control, ensuring that certain sources will be picked based on either media queries or file type support.

I’m building a toy HTML rendering engine, and I think you should too. This is the first in a series of articles.

We tend to see the web as a reactive model, where every action causes a reaction. Users click, then we take them to a new page. They click again, and we open another page. But we can do better. We can be proactive with prebrowsing.

Love it or hate it, there’s no denying the popularity of HTML emails. And, like the web before it, the inbox has officially gone mobile—with over 50 percent of email opens occurring on mobile devices.

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Building on the principles of responsive web design first codified by Ethan Marcotte, a revolution in email design is giving birth to an experience fast approaching that of the modern web. Subscribers need no longer be subjected to terrible reading experiences, frustrating touch targets, and tiny text.

As reported by Cameron McCormack, Firefox Nightly (version 29) now supports CSS variables. You can get a quick overview in this short screencast:

The Encrypted Media Extensions (DRM in HTML5) specification does not solve the problem the authors are attempting to solve, which is the protection of content from opportunistic or professional piracy. The HTML WG should not publish First Public Working Drafts that do not effectively address the primary goal of a specification.

Responsive web design is the practice of building a website suitable to work on every device and every screen size, no matter how large or small, mobile or desktop. Responsive web design is focused around providing an intuitive and gratifying experience for everyone. Desktop computer and cell phone users alike all benefit from responsive websites.