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If you’ve ever stood on a chair holding a cell phone up to get a better signal or refreshed a page that’s been hanging for 30 seconds, you already know that today’s user experiences have a gaping hole. We’re spending thousands of hours crafting interfaces that are the product of countless conversations, user tests, and analytics data piled up to our (virtual) eyeballs—only to have the experience crippled by a weird signal coming from a cell tower.

Maybe your user has switched from 3G to WiFi. Maybe her battery is low. Or maybe it’s simply dark out. Whatever the scenario, real-life factors can easily thwart your best intentions—and leave your users frustrated and angry.

The concept of considering real-world factors while designing isn’t new. Environmental design can be traced back to at least 500 BCE, when the ancient Greeks started creating houses that were heated with solar energy, and it’s based on two simple truths: The real world exists, and you can’t control it.

You can’t control all the factors when a user interacts with your design, but you can certainly plan for them simply by acknowledging that they exist. I call these design conditions. Some design conditions, like the device a person is using, stay the same through a single visit or interaction with your product. But other design conditions—like energy consumption, lighting, and signal strength—have the potential (and tendency) to change during the course of a single visit, or even from page load to page load.

Just a year ago, I wouldn’t have had much of an answer for these user experience problems because the device-level APIs needed weren’t ready for primetime yet. But today, we can start to do something to improve our users’ experiences, even under these dynamic conditions, thanks to the recent buildup of the Device API."""

Responsive design goes further than the width of the user's screen.

#futurefriendly
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