StylePropertyMapReadOnly: keys() method

Note: This feature is available in Web Workers.

The StylePropertyMapReadOnly.keys() method returns a new array iterator containing the keys for each item in StylePropertyMapReadOnly.

Syntax

js
keys()

Parameters

None.

Return value

A new Array.

Examples

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Basic usage

In this example, we use the keys() method to access the properties within the Element.computedStyleMap().

js
// get a button element
const buttonEl = document.querySelector("button");

// we can retrieve all computed styles with `computedStyleMap`
const allComputedStyles = buttonEl.computedStyleMap();

// keys returns an iterable list of properties
const props = allComputedStyles.keys();
console.log(props.next().value); // returns align-content

Specifications