package.lib.util.dom.mjs Maven / Gradle / Ivy
/**
* Returns:
* - 'null' if the node is not attached to the DOM
* - the root node (HTMLDocument | ShadowRoot) otherwise
*/
export function attachedRoot(node) {
/* istanbul ignore next */
if (typeof node.getRootNode !== 'function') {
// Shadow DOM not supported (IE11), lets find the root of this node
while (node.parentNode) node = node.parentNode;
// The root parent is the document if the node is attached to the DOM
if (node !== document) return null;
return document;
}
const root = node.getRootNode();
// The composed root node is the document if the node is attached to the DOM
if (root !== document && root.getRootNode({
composed: true
}) !== document) return null;
return root;
}
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