Photosensitive Epilepsy should be a concern to anyone creating any type of animated media. As a matter of fact, in order to pass WCAG Level A, a web page cannot “contain anything that flashes more than three times in any one second period, or the flash is below the general flash and red flash thresholds”. Testing this requirement may seem a little daunting at first, but luckily there is a free tool called PEAT that web developers can use to test if their animations and videos can cause an epileptic attack. This blog post talks about how to use PEAT, what it’s limitations are, and how to work around them.
Entries Tagged as 'Uncategorized'
April 2nd, 2017 by zoltan · No Comments
February 20th, 2017 by zoltan · 3 Comments
January 28th, 2017 by zoltan · 2 Comments
Firefox, unlike every other browser on the planet, changes the way that keyboard navigation works in designs that use the CSS
May 10th, 2016 by zoltan · No Comments
The Firefox team has made some unique choices when rendering fonts in the Windows operating system. As a result, certain fonts under 16 pixels in size render really bad in HTML5 Canvas as well as CSS. This blog post shows how you can fix this issue and have clean, transformed typography in any OS.
November 7th, 2015 by zoltan · 2 Comments
PNGs with alpha channels are great, but they can take up a lot of bandwidth. Alternative image formats such as JPEG-XR, JPEG 2000 and WEBP are more efficient, but they are not supported by FIrefox (and may never be). In comes a full cross-browser solution: SVG files that encapulate a JPEG with an alpha channel. This post will cover how to create these image files a number of different ways, and show how you can animate these images as well.
July 16th, 2015 by zoltan · 1 Comment
It’s possible to super-impose dynamic HTML content on top of a photos using 3D transforms to give the appearance that it is part of the picture. However, using a combination of
rotate3d() functions to do this is difficult. This article discusses how to use the
matrix3d() CSS transform with the Matrix Construction Set to get pixel-perfect 3D transforms easily and without any knowledge of matrix arithmetic. It also discusses the differences between
matrix3d(), as well as what fallbacks to use for browsers that don’t support transforms.
January 14th, 2015 by zoltan · 11 Comments
WEBP, JPEG 2000, JPEG-XR, APNG … these image formats have features that are not available in the traditional GIF/JPEG/PNG/SVG image stack, like animation, lossy compressions paired with alpha channels and better quality at higher compression levels. However, each browser seems to support only some of these formats. With the
<picture> element, along with the picturefill polyfill, you can use these great formats today while using the older formats for an old-fashioned fallback. This blog post will explain how to use picturefill or modernizr to use these formats, why you would want to use these image formats, and what tools you can use to generate them.
May 4th, 2014 by zoltan · 2 Comments
If you’ve been using CSS3 Transforms, you have probably seen that sometimes, transformed text that is not spaced correctly, is rendered with jagged edges, and letters are placed correctly on the transformed baseline. Furthermore, transformed text becomes smoother when animating, but about a second after the animation stops, you’ll see it reverts back to its former jaggedy self. This effect is really pronounced in Windows, but also appears in Mac OS X and Linux browsers. What is a typography nut to do? In this article, I present three fixes to this issue using the CSS
September 20th, 2013 by zoltan · 2 Comments
After playing around with the technology for the past two years, I have done research on how to improve the look and legibility of @font-face type. Faux-bolding and faux-italicizing (i.e. “obliquing”) can be easily avoided a lot more easily with new browsers (and in some cases, even older IE!). Fonts that look horrible in Windows can be improved with autohinting. And best of all, advanced features of OpenType fonts, like ligatures, alternative glyphs, and other character variations are almost in all the major browsers (Safari, the only holdout, will have it later this year). Let’s see how we can put this all into practice today.
May 20th, 2013 by zoltan · No Comments