Responsive web design is the approach that suggests that design and development should respond to the user’s behavior and environment based on screen size, platform and orientation. The practice consists of a mix of flexible grids and layouts, images and an intelligent use of CSS media queries. As the user switches from their laptop to iPad, the website should automatically switch to accommodate for resolution, image size and scripting abilities.

Almost every new client these days wants a mobile version of their website. It’s practically essential after all: one design for the BlackBerry, another for the iPhone, the iPad, netbook, Kindle — and all screen resolutions must be compatible, too. In the next five years, we’ll likely need to design for a number of additional inventions. When will the madness stop? It won’t, of course.

In the field of Web design and development, we’re quickly getting to the point of being unable to keep up with the endless new resolutions and devices. For many websites, creating a website version for each resolution and new device would be impossible, or at least impractical. Should we just suffer the consequences of losing visitors from one device, for the benefit of gaining visitors from another? Or is there another option?

Responsive website design is the approach that suggests that design and development should respond to the user’s behavior and environment based on screen size, platform and orientation. The practice consists of a mix of flexible grids and layouts, images and an intelligent use of CSS media queries. As the user switches from their laptop to iPad, the website should automatically switch to accommodate for resolution, image size and scripting abilities. In other words, the website should have the technology to automatically respond to the user’s preferences. This would eliminate the need for a different design and development phase for each new gadget on the market.

The Concept of Responsive Web Design

Ethan Marcotte wrote an introductory article about the approach, “Responsive Web Design,” for A List Apart. It stems from the notion of responsive architectural design, whereby a room or space automatically adjusts to the number and flow of people within it:

“Recently, an emergent discipline called “responsive architecture” has begun asking how physical spaces can respond to the presence of people passing through them. Through a combination of embedded robotics and tensile materials, architects are experimenting with art installations and wall structures that bend, flex, and expand as crowds approach them. Motion sensors can be paired with climate control systems to adjust a room’s temperature and ambient lighting as it fills with people. Companies have already produced “smart glass technology” that can automatically become opaque when a room’s occupants reach a certain density threshold, giving them an additional layer of privacy.”

Transplant this discipline onto Web design, and we have a similar yet whole new idea. Why should we create a custom Web design for each group of users; after all, architects don’t design a building for each group size and type that passes through it? Like responsive architecture, Web design should automatically adjust. It shouldn’t require countless custom-made solutions for each new category of users.

Obviously, we can’t use motion sensors and robotics to accomplish this the way a building would. Responsive Web design requires a more abstract way of thinking. However, some ideas are already being practiced: fluid layouts, media queries and scripts that can reformat Web pages and mark-up effortlessly (or automatically).

But responsive Web design is not only about adjustable screen resolutions and automatically resizable images, but rather about a whole new way of thinking about design. Let’s talk about all of these features, plus additional ideas in the making.

Adjusting Screen Resolution Link

With more devices come varying screen resolutions, definitions and orientations. New devices with new screen sizes are being developed every day, and each of these devices may be able to handle variations in size, functionality and even color. Some are in landscape, others in portrait, still others even completely square. As we know from the rising popularity of the iPhone, iPad and advanced smartphones, many new devices are able to switch from portrait to landscape at the user’s whim. How is one to design for these situations?


In addition to designing for both landscape and portrait (and enabling those orientations to possibly switch in an instant upon page load), we must consider the hundreds of different screen sizes. Yes, it is possible to group them into major categories, design for each of them, and make each design as flexible as necessary. But that can be overwhelming, and who knows what the usage figures will be in five years? Besides, many users do not maximize their browsers, which itself leaves far too much room for variety among screen sizes.

Morten Hjerde and a few of his colleagues identified statistics on about 400 devices sold between 2005 and 2008. Below are some of the most common:

Since then even more devices have come out. It’s obvious that we can’t keep creating custom solutions for each one. So, how do we deal with the situation?

Part Of The Solution: Flexible Everything Link

A few years ago, when flexible layouts were almost a “luxury” for websites, the only things that were flexible in a design were the layout columns (structural elements) and the text. Images could easily break layouts, and even flexible structural elements broke a layout’s form when pushed enough. Flexible designs weren’t really that flexible; they could give or take a few hundred pixels, but they often couldn’t adjust from a large computer screen to a netbook.

Now we can make things more flexible. Images can be automatically adjusted, and we have workarounds so that layouts never break (although they may become squished and illegible in the process). While it’s not a complete fix, the solution gives us far more options. It’s perfect for devices that switch from portrait orientation to landscape in an instant or for when users switch from a large computer screen to an iPad.

In Ethan Marcotte’s article, he created a sample Web design that features this better flexible layout:

The entire design is a lovely mix of fluid grids, fluid images and smart mark-up where needed. Creating fluid grids is fairly common practice, and there are a number of techniques for creating fluid images:

  • Hiding and Revealing Portions of Images
  • Creating Sliding Composite Images
  • Foreground Images That Scale With the Layout

For more information on creating fluid websites, be sure to look at the book “Flexible Web Design: Creating Liquid and Elastic Layouts with CSS” by Zoe Mickley Gillenwater.

Flexible Images Link

One major problem that needs to be solved with responsive Web design is working with images. There are a number of techniques to resize images proportionately, and many are easily done. The most popular option, noted in Ethan Marcotte’s article on fluid images but first experimented with by Richard Rutter, is to use CSS’s max-width for an easy fix.

As long as no other width-based image styles override this rule, every image will load in its original size, unless the viewing area becomes narrower than the image’s original width. The maximum width of the image is set to 100% of the screen or browser width, so when that 100% becomes narrower, so does the image. Essentially, as Jason Grigsby noted, “The idea behind fluid images is that you deliver images at the maximum size they will be used at. You don’t declare the height and width in your code, but instead let the browser resize the images as needed while using CSS to guide their relative size”. It’s a great and simple technique to resize images beautifully.

Note that max-width is not supported in IE, but a good use of width: 100% would solve the problem neatly in an IE-specific style sheet. One more issue is that when an image is resized too small in some older browsers in Windows, the rendering isn’t as clear as it ought to be. There is a JavaScript to fix this issue, though, found in Ethan Marcotte’s article.

While the above is a great quick fix and good start to responsive images, image resolution and download times should be the primary considerations. While resizing an image for mobile devices can be very simple, if the original image size is meant for large devices, it could significantly slow download times and take up space unnecessarily.

Filament Group’s Responsive Images Link

This technique, presented by the Filament Group, takes this issue into consideration and not only resizes images proportionately, but shrinks image resolution on smaller devices, so very large images don’t waste space unnecessarily on small screens. Check out the demo page here.


This technique requires a few files, all of which are available on Github. First, a JavaScript file (rwd-images.js), the .htaccess file and an image file (rwd.gif). Then, we can use just a bit of HTML to reference both the larger and smaller resolution images: first, the small image, with an .r prefix to clarify that it should be responsive, and then a reference to the bigger image using data-fullsrc.

The data-fullsrc is a custom HTML5 attribute, defined in the files linked to above. For any screen that is wider than 480 pixels, the larger-resolution image (largeRes.jpg) will load; smaller screens wouldn’t need to load the bigger image, and so the smaller image (smallRes.jpg) will load.
The JavaScript file inserts a base element that allows the page to separate responsive images from others and redirects them as necessary. When the page loads, all files are rewritten to their original forms, and only the large or small images are loaded as necessary. With other techniques, all higher-resolution images would have had to be downloaded, even if the larger versions would never be used. Particularly for websites with a lot of images, this technique can be a great saver of bandwidth and loading time.

This technique is fully supported in modern browsers, such as IE8+, Safari, Chrome and Opera, as well as mobile devices that use these same browsers (iPad, iPhone, etc.). Older browsers and Firefox degrade nicely and still resize as one would expect of a responsive image, except that both resolutions are downloaded together, so the end benefit of saving space with this technique is void.

Stop iPhone Simulator Image Resizing Link

One nice thing about the iPhone and iPod Touch is that Web designs automatically rescale to fit the tiny screen. A full-sized design, unless specified otherwise, would just shrink proportionally for the tiny browser, with no need for scrolling or a mobile version. Then, the user could easily zoom in and out as necessary.

There was, however, one issue this simulator created. When responsive Web design took off, many noticed that images were still changing proportionally with the page even if they were specifically made for (or could otherwise fit) the tiny screen. This in turn scaled down text and other elements.


Because this works only with Apple’s simulator, we can use an Apple-specific meta tag to fix the problem, placing it below the website’s <head> section. Thanks to Think Vitamin’s article on image resizing, we have the meta tag below:

Setting the initial-scale to 1 overrides the default to resize images proportionally, while leaving them as is if their width is the same as the device’s width (in either portrait or lanscape mode). Apple’s documentation has a lot more information on the viewport meta tag.

Touchscreens VS Cursors Link

Touchscreens are becoming increasingly popular. Assuming that smaller devices are more likely to be given touchscreen functionality is easy, but don’t be so quick. Right now touchscreens are mainly on smaller devices, but many laptops and desktops on the market also have touchscreen capability. For example, the HP Touchsmart tm2t is a basic touchscreen laptop with traditional keyboard and mouse that can transform into a tablet.


Touchscreens obviously come with different design guidelines than purely cursor-based interaction, and the two have different capabilities as well. Fortunately, making a design work for both doesn’t take a lot of effort. Touchscreens have no capability to display CSS hovers because there is no cursor; once the user touches the screen, they click. So, don’t rely on CSS hovers for link definition; they should be considered an additional feature only for cursor-based devices.

Look at the article “Designing for Touchscreen” for more ideas. Many of the design suggestions in it are best for touchscreens, but they would not necessarily impair cursor-based usability either. For example, sub-navigation on the right side of the page would be more user-friendly for touchscreen users, because most people are right-handed; they would therefore not bump or brush the navigation accidentally when holding the device in their left hand. This would make no difference to cursor users, so we might as well follow the touchscreen design guideline in this instance. Many more guidelines of this kind can be drawn from touchscreen-based usability.

Web Design Tips Source: Smashing Magazine

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