Function getRootNode

third_party/resize-observer-polyfill/ResizeObserver.js:463–471

* A shim for the `Node.getRootNode()` API. * * See https://developer.mozilla.org/en-US/docs/Web/API/Node/getRootNode for * more info. * * @param {Node} node * @returns {Node}

(node)

     * @returns {Node}
     */
    function getRootNode(node) {
        if (typeof node.getRootNode === 'function') {
            return node.getRootNode();
        }
        var n;
        // eslint-disable-next-line no-empty
        for (n = node; n.parentNode; n = n.parentNode) { }
        return n;
    }

    // Check if IntersectionObserver is available.
    var intersectionObserverSupported = typeof IntersectionObserver !== 'undefined';