This article you’re reading is actually a responsive design!
To see it in action, open this article on a desktop browser and slowly make the browser thinner and wider. You should see the layout magically adjust itself to more comfortably fit the new width of the browser, even if you make the page as skinny as the resolution of a mobile phone.
So, what is responsive design exactly? Actually, a better question to ask might be, what problem does responsive web design solve? Well, as you may have noticed, computers aren’t the only piece of hardware with a web browser anymore. I might get myself in trouble by saying this, but the iPhone was one of the first mobile devices to feature a really great web browser, and it really put the spotlight on upgrading the experience of the mobile web. Many other devices followed suit and, seemingly overnight, the face of the mobile web had changed.
The changing landscape of web browsers meant that users expectations also changed; people expected to be able to browse the web on their phones just as easily as they browse the web on a desktop computer. So, in response to this the web design community started creating mobile versions of their websites. In hindsight, this wasn’t really the way forward, but at the time it seemed like a reasonable idea. Every website would have their normal ‘desktop’ version of their site, and as a bonus, a ‘mobile’ version.
Technology never stops marching forward, so not long after the phone hardware market had been revolutionized, other form factors surged in popularity. In addition to phones and personal computers, devices like touchscreen tablets and small notebook computers (netbooks, if you prefer the term) started appearing everywhere.
It’s not just small screens, either. Large, high-resolution displays are starting to become much more common than they used to be, and it would be a waste for web designers to not take advantage of this.
In summary, the spectrum of screen sizes and resolutions is widening every day, and creating a different version of a website that targets each individual device is not a practical way forward. This is the problem that responsive web design addresses head on.