Interface StylePropertyMapReadOnly

The StylePropertyMapReadOnly interface of 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().

MDN Reference

interface StylePropertyMapReadOnly {
    size: number;
    "[iterator]"(): StylePropertyMapReadOnlyIterator<
        [string, Iterable<CSSStyleValue, any, any>],
    >;
    entries(): StylePropertyMapReadOnlyIterator<
        [string, Iterable<CSSStyleValue, any, any>],
    >;
    forEach(
        callbackfn: (
            value: CSSStyleValue[],
            key: string,
            parent: StylePropertyMapReadOnly,
        ) => void,
        thisArg?: any,
    ): void;
    get(property: string): CSSStyleValue | undefined;
    getAll(property: string): CSSStyleValue[];
    has(property: string): boolean;
    keys(): StylePropertyMapReadOnlyIterator<string>;
    values(): StylePropertyMapReadOnlyIterator<
        Iterable<CSSStyleValue, any, any>,
    >;
}

Hierarchy (View Summary)

Index
size
[iterator] entries forEach get getAll has keys values
size: number

The size read-only property of the StylePropertyMapReadOnly interface returns an unsigned long integer containing the size of the StylePropertyMapReadOnly object.

MDN Reference

  • The get() method of the StylePropertyMapReadOnly interface returns a CSSStyleValue object for the first value of the specified property.

    MDN Reference

    Parameters

    • property: string

    Returns CSSStyleValue | undefined

  • The getAll() method of the StylePropertyMapReadOnly interface returns an array of CSSStyleValue objects containing the values for the provided property.

    MDN Reference

    Parameters

    • property: string

    Returns CSSStyleValue[]

  • The has() method of the StylePropertyMapReadOnly interface indicates whether the specified property is in the StylePropertyMapReadOnly object.

    MDN Reference

    Parameters

    • property: string

    Returns boolean

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