Individual skill
sizing-units
rem, px or relative units for each kind of value. Use when defining spacing and sizing tokens, control heights or media queries, or when a layout breaks under enlarged text.
skills/sizing-units/SKILL.md
Source commit 8f78f13f74a2356326d0c3c21bc63e5624e6a457
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SKILL.mdcore · 6,316 bytes
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# Sizing Units
## The Question the Unit Answers
A unit is not a formatting preference. It is a declaration of what happens to a value when the user enlarges text.
- `rem` — this value belongs to the text and must grow with it.
- `px` — this value belongs to the screen and must stay put.
- `%`, `fr`, `ch`, `clamp()`, `min()` — this value belongs to the available space.
Pick the unit by answering that question, not by picking a house style and applying it everywhere. Both absolutist positions — all-rem and all-px — produce defects, and they are different defects.
## Zoom Is Not the Font-Size Setting
