Rems
I call rem
, the root em
. Assuming the “r” comes from the word, “root”. While this may not be the general way people describe the rem
unit, it will help you form great mental models.
The em
unit scales against the font-size of the parent element, BUT the rem
unit will only scale against the root
element.
The root
element here is usually, the html
element.
Let’s see an example:
If you wrote this:
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