text: /* @flow */
  
  import { warn } from 'core/util/index'
  
  export * from './attrs'
  export * from './class'
  export * from './element'
  
  /**
   * Query an element selector if it's not an element already.
   */
  export function query(el: string | Element): Element {
      if (typeof el === 'string') {
          const selected = document.querySelector(el)
          if (!selected) {
              process.env.NODE_ENV !== 'production' && warn(
                  'Cannot find element: ' + el
              )
              return document.createElement('div')
          }
          return selected
      } else {
          return el
      }
  }
  