It used to be so simple: you’d design a website or application for a 15-inch monitor, and—incompatibilities between browsers aside—you were done.
Then mobile phones with web browsers came along and ruined our easy lives. Worst of all, people loved browsing the Web on them!
In 2016, browsing the web on mobile devices overtook desktop browsing for the first time.
Just as developers and designers got used to building websites for phones, along came tablets, watches, TVs, cars, glasses, larger desktop screens, high-resolution screens, and even web browsers built into walls. (Okay, I made that last one up.) Supporting this seemingly endless stream of new devices is ...