CSS overflow-clip-box Property Reference

The CSS overflow-clip-box property is a nonstandard property in Mozilla Extensions. Review its formal syntax, computed behavior, and practical declarations.

Updated 2026-08-12

overflow-clip-box overview

The CSS overflow-clip-box property is a nonstandard property in Mozilla Extensions. 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-clip-box formal syntax

Field	Value
Formal syntax	padding-box \| content-box
Initial value	padding-box
Applies to	allElements
Inherited	No
Percentages	no
Computed value	asSpecified
Animation type	discrete
Media	visual
Specification group	Mozilla Extensions
Status	Nonstandard

Practical examples

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

overflow-clip-box live example

CSS

.reset-example {
  overflow-clip-box: initial;
}

.inherit-example {
  overflow-clip-box: inherit;
}

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