- A CSS term referring to a custom property value that is syntactically valid but computationally invalid, causing the property to behave as if it were unset. This behavior is distinct from an undefined custom property and is exploited in techniques like the space toggle for creating CSS-only conditional logic.
- Related terms: Invalid at computed-value time · Custom property · Space toggle · Property
- Previous term: gTLD
- Next term: Guerrilla patching
- Random term: Hop limit (webglossary.info/random 🎲)