StylePropertyMapReadOnly: has() method

Note: This feature is available in Web Workers.

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

Syntax

js
has(property)

Parameters

property

The name of a property.

Return value

A boolean value.

Examples

undefined

Basic usage

Here we use the has() method to see if the padding-top property is present within the button elements style attribute.

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

// find what's in the style attribute with attributeStyleMap and has()
const hasPadTop = buttonEl.attributeStyleMap.has("padding-top");

console.log(hasPadTop); // logs true if padding-top is present in style attribute

Specifications