StylePropertyMap: append() method

Limited availability

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

The append() method of the StylePropertyMap interface adds the passed CSS value to the StylePropertyMap with the given property.

Syntax

append(property, value)

Parameters

property: An identifier indicating the stylistic feature (e.g. font, width, background color) to add.
value: The value the given property should have.

Return value

None (undefined).

Examples

This example shows an extra background image value being added to the background-image property of the element, using HTMLElement.attributeStyleMap.

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

// append another value to the background-image property set on the attribute
buttonEl.attributeStyleMap.append(
  "background-image",
  "linear-gradient(180deg, blue, black)",
);

Specifications

Specification
CSS Typed OM Level 1 # dom-stylepropertymap-append

Browser compatibility

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