random DOM utility functions

dom-utils.js

/**
 * Given a Node. Find the first parent node that matches a selector
 *
 * @param node {Node} the base node who's parents will be traversed
 * @param selector {string} asdfasdf
 * @returns {Node|null} the node, or null if nothing was found
 */
 function findFirstParentNodeMatchingSelector(node, selector) {
    var parent = node.parentNode;

    if (parent === null) return null;

    if (parent.matches(selector)) {
        return parent;
    }

    return findFirstParentNodeMatchingSelector(parent, selector);
}