CSSStyleDeclaration: length property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The read-only property returns an integer that represents the number of style declarations in this CSS declaration block.
Value
An integer that provides the number of styles explicitly set on the parent of the instance.
Examples
The following gets the number of explicitly set styles on the following HTML element:
html
<div
id="div1"
style="margin: 0 10px; background-color: #ccaa11; font-family: monospace"></div>
JavaScript code:
js
const myDiv = document.getElementById("div1");
const divStyle = myDiv.style;
const len = divStyle.length; // 6
Specifications
| Specification |
|---|
| CSS Object Model (CSSOM) # dom-cssstyledeclaration-length |