![]() ![]() The purpose of this attribute is to force user agents to select an appropriate resource from a set, rather than fetch the entire set. It uses a div and data-attribute syntax for safety’s sake.Ī second proposal for responsive images markup was made to the W3C by Apple and is called “The srcset Attribute” its CSS Level 4 equivalent is image-set(). A polyfill named Picturefill is available, which does pretty much the same thing. The solution is currently being discussed by the W3C Responsive Images Community Group but is not usable in any browser at the moment as far as we know. ![]() The W3C’s “ Art Direction” use case shows a nice example of what could be done. If providing different sources is possible, then we could also imagine providing different crops of an image to focus on what’s important for smaller devices. The code in the proposed specification looks like this : It works a bit like the markup for video, but with different images being referred to in the source element. Thus, smaller devices would get smaller images. The concept is to use the now well-known media queries to serve different images to different devices. The Responsive Images Community Group supports a proposal for a new, more flexible element, the element. The second problem affects smaller devices: why should a mobile device have to download a 750-pixel image when it only needs a 300-pixel one? And do we have a way to crop images so that small-device users can focus on what is important in them? Two Markup Solutions: The Element And The srcset AttributeĪ first step in solving the challenge of responsive images is to change the markup of embedded images on an HTML page. Also, depending on which country the user lives in, bandwidth can be pretty costly. Users of high-density devices might not have the bandwidth necessary to download those images. Double-sized images would take more time to load. Simply serving double-sized images to high-density devices might be tempting, right? But that would create a performance problem. Most designers like pixel perfection, but “normal”-sized images on high-density devices look pixelated and blurry. In responsive Web design, images come with two big related challenges: size and performance. By high density, I mean screens with a pixel ratio higher than 2 Apple calls these Retina devices, and Google calls them XHDPI. It got more and more important with the arrival of all of the high-density screens. What better aspect of responsive Web design to start off with than images? This has been a major topic for a little while now. The State Of Images In Responsive Web Design This article is not exhaustive, and we won’t go deep into each technique, but you’ll have enough links and knowledge to explore further by yourself. In this article, we will look at what is currently possible, what will be possible in the future using what are not yet standardized properties (such as CSS Level 4 and HTML5 APIS), and what still needs to be improved. Many well-known people such as Brad Frost and Luke Wroblewski have a lot of experience with it and have helped us make huge improvements in the field. Responsive Web design has been around for some years now, and it was a hot topic in 2012. In this article, Stéphanie Walter will look at what is currently possible, what will be possible in the future using what are not yet standardized properties, and what still needs to be improved. Responsive Web design has been around for some years now, but there’s still a whole lot to do. ![]()
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