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CSS Object Model (CSSOM)

The CSS Object Model is a set of APIs 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.

Reference

Several other interfaces are also extended by the CSSOM-related specifications: Document, Window, Element, HTMLElement, HTMLImageElement, Range, MouseEvent, and SVGElement.

CSS Typed Object Model

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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.

Tutorials

Specifications

Specification
CSS Object Model (CSSOM)
CSSOM View Module
CSS Typed OM Level 1

Browser compatibility

See also

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https://developer.mozilla.org/en-US/docs/Web/API/CSS_Object_Model