StylePropertyMap: append() method
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Want more browser support for this feature? Tell us why.
The append() method of the StylePropertyMap interface adds the passed CSS value to the StylePropertyMap with the given property.
Syntax
js
append(property, value)
Parameters
Return value
None (undefined).
Examples
Basic usage
This example shows an extra background image value being added to the background-image property of the element, using HTMLElement.attributeStyleMap.
js
// 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 |