StylePropertyMapReadOnly.has()

Experimental

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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

Syntax

var boolean = StylePropertyMapReadOnly.has(property)

Parameters

property
The name of a property.

Return value

A boolean.

Example

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

// 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

Specification Status Comment
CSS Typed OM Level 1
The definition of 'has()' in that specification.
Working Draft Initial definition.

Browser compatibility

BCD tables only load in the browser