梁美英 / programming · Files

/* @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 selector = el
    el = document.querySelector(el)
    if (!el) {
      process.env.NODE_ENV !== 'production' && warn(
        'Cannot find element: ' + selector
      )
      return document.createElement('div')
    }
  }
  return el
}