CSS Object Model (CSSOM)
The CSS Object Model is a set of APIs and interfaces allowing the manipulation of CSS from JavaScript. It is much like the DOM, but for the CSS rather than the HTML. It allows users to read and modify CSS style dynamically.
The values of CSS are represented untyped, that is using String objects (except when using the CSS Typed Object Model API).
Guides
Interfaces
These interfaces are defined in the CSSOM specification:
AnimationEventCSSCSSConditionRuleCSSCounterStyleRuleCSSFontFaceDescriptorsCSSFontFaceRuleCSSFontFeatureValuesMapCSSFontFeatureValuesRuleCSSFunctionDeclarationsCSSFunctionDescriptorsCSSFunctionRuleCSSGroupingRuleCSSImportRuleCSSKeyframeRuleCSSKeyframesRuleCSSMarginRuleCSSMediaRuleCSSNamespaceRuleCSSPageRuleCSSPositionTryRuleCSSPositionTryDescriptorsCSSRuleCSSRuleListCSSStartingStyleRuleCSSStyleDeclarationCSSStyleSheetCSSStyleRuleCSSSupportsRuleCSSNestedDeclarationsMediaListStyleSheetStyleSheetListTransitionEvent
Several other interfaces are also extended by the CSSOM-related specifications: Document, Window, Element, HTMLElement, HTMLImageElement, Range, MouseEvent, and SVGElement.
Obsolete CSSOM interfaces
Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
CSSOM APIs
- CSS Font Loading API
-
Provides mechanisms for dynamically loading font resources.
- CSS Typed Object Model API
-
simplifies CSS property manipulation by exposing CSS values as typed JavaScript objects rather than strings.
- CSSOM view API
-
Enables manipulation of the visual view of a document, including getting the position of element layout boxes, obtaining the width or height of the viewport through script, and also scrolling an element.
Specifications
| Specification |
|---|
| CSS Object Model (CSSOM) |
| CSSOM View Module |
| CSS Typed OM Level 1 |
Browser compatibility
All these features have been added little by little over the years to the different browsers: it was a quite complex process that can't be summarized in a simple table. Please refer to the specific interfaces for its availability.