Note: This feature is available in Web Workers.
The CSSUnitValue() constructor creates a new CSSUnitValue object which returns a new CSSUnitValue object which represents values that contain a single unit type. For example, "42px" would be represented by a CSSNumericValue.
new CSSUnitValue(value, unit)valueA number indicating the number of units.
unitA string indicating the type of unit.
The following shows a method of creating a CSSPositionValue from individual CSSUnitValue constructors.
let pos = new CSSPositionValue(
new CSSUnitValue(5, "px"),
new CSSUnitValue(10, "px"),
);