xmlParser.js

const htmlparser2 = require('htmlparser2')
const define = (src, ...args) => {
  if (!args.length) args.push(src)
  const [configurable, enumerable] = [true, false]
  args.forEach(obj => {
    const keys = Object.entries(obj)
      .map(([key, value]) => ({ [key]: { value, configurable, enumerable } }))
    Object.defineProperties(src, Object.assign(...keys))
  })
  return src
}
module.exports = xml => {
  const tags = [{ $children: [] }]
  const parser = new htmlparser2.Parser({
    onopentag ($tag, $attrs) {
      const [cur] = tags
      const item = define({ $tag, $children: [], $attrs })
      cur.$children.push(item)
      if (!cur[$tag]) cur[$tag] = item
      tags.unshift(item)
    },
    ontext ($text) { define(tags[0], { $text }) },
    onclosetag ($tag) {
      if (tags[0].$tag !== $tag) throw Error('parse error')
      const { $children, $text } = tags.shift()
      if ($children.length > 0) return
      const [parent] = tags
      parent[$tag] = ($text === null || isNaN($text)) ? $text : +$text
    }
  }, { xmlMode: true })
  parser.write(xml)
  parser.end()
  return tags.length > 1 ? tags : tags[0]
}