CSS Units: A Comprehensive Guide to Length Measurement

Units for Expressing Length in CSS

CSS employs various units to express length, including pixels (px), ems (em), rems (rem), percentages (%), and viewport units (vh, vw, vmin, vmax). These units enable the precise measurement of elements, ensuring consistency across different devices and screen sizes.

Viewport Units: True Responsiveness

Viewport units, particularly vh, vw, vmin, and vmax, play a crucial role in responsive design. They are relative to the viewport, ensuring that elements scale proportionally to the user's screen size. VH, for instance, represents 1% of the viewport height, while VW represents 1% of the viewport width.