StylePropertyMapReadOnly: size property
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
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The size read-only property of the StylePropertyMapReadOnly interface returns a positive integer containing the size of the StylePropertyMapReadOnly object.
Value
A positive integer.
Examples
Basic usage
Here we use the size property to return the total entries within the button elements computedStyleMap.
js
// grab our element
const buttonEl = document.querySelector("button");
// we can retrieve all computed styles with `computedStyleMap`
const allComputedStyles = buttonEl.computedStyleMap();
// use size to get the total styles within the map
const amountStyles = allComputedStyles.size;
console.log(amountStyles); // logs 338
Specifications
| Specification |
|---|
| CSS Typed OM Level 1 # dom-stylepropertymapreadonly-size |