The parse() static method of the CSSNumericValue interface converts a value string into an object whose members are value and the units.

cssText

a string containing numeric and unit parts.

A CSSNumericValue.

SyntaxError DOMException

TBD

The following returns a CSSUnitValue object with a unit property equal to "px" and a value property equal to 42.

let numValue = CSSNumericValue.parse("42.0px");