CSS overflow-block Property Reference

The CSS overflow-block property is a standard property in CSS Overflow. Review its formal syntax, computed behavior, and practical declarations.

Updated 2026-08-12

overflow-block overview

The CSS overflow-block property is a standard property in CSS Overflow. 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

overflow-block formal syntax

Field	Value
Formal syntax	visible \| hidden \| clip \| scroll \| auto
Initial value	auto
Applies to	blockContainersFlexContainersGridContainers
Inherited	No
Percentages	no
Computed value	asSpecifiedButVisibleOrClipReplacedToAutoOrHiddenIfOtherValueDifferent
Animation type	discrete
Media	visual
Specification group	CSS Overflow
Status	Standard

Practical examples

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

overflow-block live example

CSS

.reset-example {
  overflow-block: initial;
}

.inherit-example {
  overflow-block: inherit;
}

@supports (overflow-block: initial) {
  .supported {
    overflow-block: initial;
  }
}