March 2018
Intermediate to advanced
472 pages
13h 5m
English
Content preview from CSS in DepthBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 2. Working with relative units
This chapter covers
- The versatility of relative units
- How to use ems and rems, without letting them drive you mad
- Using viewport-relative units
- An introduction to CSS variables
When it comes to specifying values, CSS provides a wide array of options to choose from. One of the most familiar, and probably easiest to work with, is pixels. These are known as absolute units; that is, 5 px always means the same thing. Other units, such as em and rem, are not absolute, but relative. The value of relative units changes, based on external factors; for example, the meaning of 2 em changes depending on which element (and sometimes even which property) you’re using it on. Naturally, this makes relative units more ...
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