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StylePropertyMapReadOnly

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

The StylePropertyMapReadOnly interface of the the CSS Typed Object Model API provides a read-only representation of a CSS declaration block that is an alternative to CSSStyleDeclaration. Retrieve an instance of this interface using Element.computedStyleMap().

StylePropertyMapReadOnly.size: Returns an unsinged long integer containing the size of the StylePropertyMapReadOnly object.

StylePropertyMapReadOnly.entries(): Returns an array of a given object's own enumerable property [key, value] pairs, in the same order as that provided by a for...in loop (the difference being that a for-in loop enumerates properties in the prototype chain as well).
StylePropertyMapReadOnly.forEach(): Executes a provided function once for each element of StylePropertyMapReadOnly.
StylePropertyMapReadOnly.get(): Returns the value of the specified property.
StylePropertyMapReadOnly.getAll(): Returns an array of CSSStyleValue objects containing the values for the provided property.
StylePropertyMapReadOnly.has(): Indicates whether the specified property is in the StylePropertyMapReadOnly object.
StylePropertyMapReadOnly.keys(): Returns a new Array Iterator containing the keys for each item in StylePropertyMapReadOnly.
StylePropertyMapReadOnly.values(): Returns a new Array Iterator containing the values for each index in the StylePropertyMapReadOnly object.

Specification	Status	Comment
CSS Typed OM Level 1 The definition of 'StylePropertyMapReadOnly' in that specification.	Working Draft	Initial definition.

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