VH vs. VW vs. %: What's the Difference in CSS Units?

CSS Units: Delving into the Distinction between vh/vw and %

While percentage (%), a common CSS unit, measures relative to the element's parent container, vh and vw present a different perspective. vh (viewport height) and vw (viewport width) exclusively relate to the height and width of the viewport, respectively.

Unlike the % unit, vh and vw ensure a consistent relationship with the viewport. Regardless of the parent element's size, 100vh and 100vw always represent the full height and width of the user's visible screen area.

Consider this example: a child div with 100% height within a 200px-tall parent div will not necessarily fill the entire viewport if the viewport is taller than 200px. However, setting its height to 100vh guarantees that it occupies the complete height of the viewport.

This distinction becomes particularly relevant in fluid layouts that adapt to different screen sizes and orientations. vh and vw provide a reliable way to define element dimensions relative to the user's viewport, ensuring elements maintain their proportional relationships and readability across devices.

In summary, vh and vw differ from the % unit by anchoring dimensions solely to the viewport, providing consistency and responsiveness in both sizing and layout. This difference empowers web developers to create websites that adapt seamlessly to diverse screen sizes and enhance the user experience across various platforms.

The above is the detailed content of VH vs. VW vs. %: What's the Difference in CSS Units?. For more information, please follow other related articles on the PHP Chinese website!