As have already been introduced, a number of factors need to be considered when talking about responsiveness.
Here is a list of some of the most significant ones:
- Device type (desktop, mobile, and so on)
- Screen resolution
- Screen form factor (3:4, 16:9, 16:10, and more)
- Screen density (depending on screen size and resolution), aka pixel ratio
- The ability to change orientation during the lifetime of the application (generally true for mobile devices)
Let's have a quick glance at all of the aforementioned factors and how they relate to one another. In a perfect world, our application should be capable of seamlessly adapting to deliver a fully functional, effective, eye candy user interface (UI) in every possible case. This is really hard to achieve and developers all around the world are struggling every day to improve their applications and technologies to shorten the distance to this goal.