CSS

The CSS interface holds useful CSS-related methods. No objects with this interface are implemented: it contains only static methods and is therefore a utilitarian interface.

The CSS interface is a utility interface and no object of this type can be created: only static properties are defined on it.

CSS.paintWorklet (en-US) Secure context

Provides access to the Worklet responsible for all the classes related to painting.

The CSS interface is a utility interface and no object of this type can be created: only static methods are defined on it.

No inherited static methods.

CSS.registerProperty() (en-US)

Registers custom properties (en-US), allowing for property type checking, default values, and properties that do or do not inherit their value.

CSS.supports() (en-US)

Returns a Boolean indicating if the pair property-value, or the condition, given in parameter is supported.

CSS.escape()

Can be used to escape a string mostly for use as part of a CSS selector.

CSS factory functions (en-US)

Can be used to return a new CSSUnitValue with a value of the parameter number of the units of the name of the factory function method used.

CSS.em(3) // CSSUnitValue {value: 3, unit: "em"}

• Components.utils.importGlobalProperties