Find DOM nodes via XPath

xpath.js

/**
 * Find nodes via XPath
 *
 * @param {string} query
 * @param {Node} root 
 * @returns {Node[]}
 */
export function xpath(query, root = document) {
  let iterator = document.evaluate(query, document)

  try {
    let currentNode = iterator.iterateNext()
    let nodes = []

    while (currentNode) {
      nodes.push(currentNode)
      currentNode = iterator.iterateNext()
    }

    return nodes.filter(node => root.contains(node))
  } catch (e) {
    console.warn(`Document tree modified during iteration ${e}`)
    return []
  }
}