From creating a layout to working with line-heights and font-sizes, at some point you will need to use a measurement value. Even if you have already have a measurement favorite that you are currently using, odds are that there is another value that be a better fit for your current project.
In this chapter, you learn about the various options that are available for measurement, including pixels, percentages, em units, and more.
With as many devices as there are today, what is the right value to use? Should we be using pixels for everything? What about
em units? Well, it turns out that there are many different types of measurement values available.
CSS3 introduced some new measurement values that actually ...