css - box-sizing vs. inset box-shadow -


i wondering best way add border elements without extending dimensions.

as far know, there 2 ways achieve it: box-sizing:border-box; , inset box-shadow. 1 wise use , why?

well box-shadow isn't border, it's shadow, question pretty answers itself.

if wish add border without increasing element's dimensions, you'd use box-sizing: border-box, it's designed for.

from the specification:

the specified width , height (and respective min/max properties) on element determine border box of element. is, padding or border specified on element laid out , drawn inside specified width , height.

do note, however, firefox supports prefixed version: -moz-box-sizing: ....


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