It requires no custom markup for any images and thus enables backwards compatibility by resizing images automatically. In this case, Adaptive Images is arguably the best solution out there. If the site you are working on has a large amount of legacy images, it may not be workable to go through and adjust every image with special markup or specialised CSS. If this doesn't suit and you're looking for a semantic approach, then Adaptive Images by Matt Wilcox, or the HiSRC jQuery plugin by Marc Grabanski and Christopher Schmitt, are two excellent options to look at.
To get around this, some of the techniques described below require the src of the image to be removed, or to link to a transparent GIF for example. Why? Because when the src of an image points to a real image, with an alt text to describe it, even if the src is the smallest image possible, it means you're downloading unnecessary data. Making responsive images work cleanly and reliably across multiple platforms sometimes involves using techniques that aren't ‘semantic'. All these issues have (more or less) great solutions, so read on to discover which suits you best. Then there are the technical aspects to consider - server-side components, use of JavaScript, bandwidth testing, and third-party options. Other less aesthetic issues, such as processes which either don't ‘validate' or aren't considered strictly semantic, can for some designers (or clients) be a stumbling block. Scaling images down to better fit devices is the most common approach to making content responsive, but in many cases this can make the image less powerful - the ‘art-direction problem'. So to improve efficiency, more designers now using responsive images - however, these often open up their own cans of worms. Images play a large part in this, as image quality and size in general continues to increase, but it makes little sense if the data is wasted by mobile devices or desktops with low bandwidth connection. One major factor in the need for responsive images is overall website size - even today, a huge percentage of mobile-version sites are as large (or even larger) than their desktop versions, thereby affecting performance negatively. Needless to say there is no one key to fit all locks - so we've listed seven of the most common problems below, along with a basic run-through of effective techniques related to each problem, to help you get your site running smoothly. While responsive images are now widely used and fairly easy to use in basic layouts, anyone designing more complicated sites will know that issues can quickly rear their ugly heads. And to make that possible, you of course need a flexible approach to images. In other words, creating great-looking sites which are dynamic and flexible enough to be visually responsive to any screen, from mobile widths right up to desktop format. Put simply, responsive design is an approach that enables your website to fluidly adjust within the parameters of any device - involving a minimum of scrolling or zooming. But have no fear! Below is a basic outline of what responsive images are, how they can affect your work process, and some of the key defining factors that we think should apply to any designer's thinking, whichever route you choose. The sheer range of responsive image options on the Web is daunting - and that's before you get into facing the obstacles specific to the site you're working on. However, responsive design can seem like a minefield. And as today's websites and devices become ever more varied, a plethora of responsive images techniques are appearing to serve developers' needs.
Chances are that any Web designers using our Ghostlab browser testing app, which allows seamless testing across all devices simultaneously, will have worked with responsive design in some shape or form.
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