CSS inset Property Reference

The CSS inset property is a standard property in CSS Logical Properties and Values. Review its formal syntax, computed behavior, and practical declarations.

Updated 2026-08-12

inset overview

The CSS inset property is a standard property in CSS Logical Properties and Values. 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

inset formal syntax

Field	Value
Formal syntax	<'top'>{1,4}
Initial value	top, bottom, left, right
Applies to	positionedElements
Inherited	No
Percentages	logicalHeightOrWidthOfContainingBlock
Computed value	top, bottom, left, right
Animation type	lpc
Media	visual
Specification group	CSS Logical Properties and Values
Status	Standard

Practical examples

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

inset live example

CSS

.reset-example {
  inset: initial;
}

.inherit-example {
  inset: inherit;
}

@supports (inset: initial) {
  .supported {
    inset: initial;
  }
}