CSS bottom Property Reference

The CSS bottom property is a standard property in CSS Anchor Positioning. Review its formal syntax, computed behavior, and practical declarations.

Updated 2026-08-12

bottom overview

The CSS bottom property is a standard property in CSS Anchor Positioning. Review its formal syntax, computed behavior, and practical declarations.

The property is not inherited by default. Use an explicit global keyword when inheritance is intended.

Syntax and formal definition

bottom formal syntax

Field	Value
Formal syntax	auto \| <length-percentage> \| <anchor()> \| <anchor-size()>
Initial value	auto
Applies to	positionedElements
Inherited	No
Percentages	referToContainingBlockHeight
Computed value	lengthAbsolutePercentageAsSpecifiedOtherwiseAuto
Animation type	lpc
Media	visual
Specification group	CSS Anchor Positioning
Status	Standard

Practical examples

These declarations demonstrate valid ways to set bottom. The initial and inherit global keywords remain available even when a property-specific value is preferable.

bottom live example

CSS

.reset-example {
  bottom: initial;
}

.inherit-example {
  bottom: inherit;
}

@supports (bottom: 0) {
  .supported {
    bottom: 0;
  }
}