CSS Containment Module Level 1

E662776

CSS module W3C CSS specification

CSS Containment Module Level 1 is a W3C CSS specification that defines mechanisms for isolating a subtree of the DOM to improve rendering performance and predictability of layout, style, and paint.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (3)

Label	Occurrences
CSS Containment Module Level 1 canonical	2
CSS Containment Module	1
css-contain-1	1

How this entity was disambiguated

This entity first appeared as the object of triple T7420731 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: CSS Containment Module Level 1
Context triple: [W3C CSS specifications, includes, CSS Containment Module Level 1]

A. CSS Cascade and Inheritance Module
The CSS Cascade and Inheritance Module is a W3C specification that defines how CSS declarations are prioritized, combined, and passed down through the document tree to determine the final computed styles of elements.
B. CSS Basic User Interface Module Level 3
CSS Basic User Interface Module Level 3 is a W3C specification that defines user interface–related CSS features such as box sizing, outlines, cursor properties, and UI states for web content.
C. CSS Backgrounds and Borders Module
The CSS Backgrounds and Borders Module is a W3C CSS specification that defines advanced features for styling element backgrounds, borders, and related visual effects on the web.
D. CSS Level 3 modules
CSS Level 3 modules are a collection of W3C specifications that extend and refine Cascading Style Sheets by defining advanced layout, styling, and presentation features for the web.
E. CSS Logical Properties and Values Module
CSS Logical Properties and Values Module is a W3C CSS specification that defines flow-relative, writing-mode–aware properties and values to enable more flexible, internationalized page layouts.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: CSS Containment Module Level 1
Target entity description: CSS Containment Module Level 1 is a W3C CSS specification that defines mechanisms for isolating a subtree of the DOM to improve rendering performance and predictability of layout, style, and paint.

A. CSS Cascade and Inheritance Module
The CSS Cascade and Inheritance Module is a W3C specification that defines how CSS declarations are prioritized, combined, and passed down through the document tree to determine the final computed styles of elements.
B. CSS Basic User Interface Module Level 3
CSS Basic User Interface Module Level 3 is a W3C specification that defines user interface–related CSS features such as box sizing, outlines, cursor properties, and UI states for web content.
C. CSS Backgrounds and Borders Module
The CSS Backgrounds and Borders Module is a W3C CSS specification that defines advanced features for styling element backgrounds, borders, and related visual effects on the web.
D. CSS Level 3 modules
CSS Level 3 modules are a collection of W3C specifications that extend and refine Cascading Style Sheets by defining advanced layout, styling, and presentation features for the web.
E. CSS Logical Properties and Values Module
CSS Logical Properties and Values Module is a W3C CSS specification that defines flow-relative, writing-mode–aware properties and values to enable more flexible, internationalized page layouts.
F. None of above. chosen

Statements (48)

Predicate	Object
instanceOf	CSS module ⓘ W3C CSS specification ⓘ
aimsTo	improve predictability of layout ⓘ improve predictability of paint ⓘ improve predictability of style ⓘ improve rendering performance ⓘ
appliesTo	elements in the DOM ⓘ
defines	mechanisms for isolating a subtree of the DOM ⓘ
definesConcept	containment box ⓘ containment context ⓘ layout containment ⓘ paint containment ⓘ size containment ⓘ strict containment ⓘ style containment ⓘ
definesKeyword	contain: content ⓘ contain: inline-size ⓘ contain: layout ⓘ contain: none ⓘ contain: paint ⓘ contain: size ⓘ contain: strict ⓘ contain: style ⓘ
definesProperty	contain ⓘ contain-intrinsic-size ⓘ content-visibility ⓘ
definesValue	contain-intrinsic-size: <length> ⓘ contain-intrinsic-size: none ⓘ content-visibility: auto ⓘ content-visibility: hidden ⓘ content-visibility: visible ⓘ
definesValueType	<contain-list> ⓘ <content-visibility-value> ⓘ
hasLevel	1 ⓘ
partOf	CSS Containment specification family ⓘ linked to: CSS containment
publishedBy	W3C ⓘ linked to: World Wide Web Consortium World Wide Web Consortium ⓘ
relatedTo	CSS Box Model ⓘ linked to: CSS Box Model Module CSS Display Module Level 3 ⓘ linked to: CSS Display Module CSSOM ⓘ linked to: CSS Object Model (CSSOM)
shortName	css-contain-1 ⓘ linked to: CSS Containment Module Level 1
specifies	CSS containment features ⓘ
status	W3C Recommendation ⓘ
usedFor	improving performance of large web pages ⓘ limiting the scope of layout calculations ⓘ limiting the scope of painting ⓘ limiting the scope of style recalculations ⓘ optimizing rendering of complex DOM trees ⓘ

How these facts were elicited

Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

W3C CSS specifications → includes → CSS Containment Module Level 1 ⓘ

CSS containment → introducedIn → CSS Containment Module Level 1 ⓘ

CSS Containment Module Level 1 → shortName → css-contain-1 ⓘ

linked to: CSS Containment Module Level 1

CSS Sizing Module → relatedTo → CSS Containment Module ⓘ