StylePropertyMapReadOnly: has() method

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

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

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

Specification
CSS Typed OM Level 1
# dom-stylepropertymapreadonly-has

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
has

Legend

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Full support
Full support
No support
No support
See implementation notes.