selectors

dom.js

/**
* canUseDOM
* @return {Boolean}
*/
export const canUseDOM = !!(
  typeof window !== 'undefined' && window.document && window.document.createElement
)

/**
* win
* @return {Boolean}
*/
export const win = canUseDOM ? window : null

/**
* doc
* @return {Boolean}
*/
export const doc = canUseDOM ? document : null

selector.js

import { canUseDOM, doc } from './dom'

/**
* $$
* @param {element} selector
* @param {element} context
* @return {object}
*/
export function $$ (selector, context = null) {
  if (!selector) return

  return (context == null ? doc : context).querySelector(selector)
}

/**
* $$$
* @param {element} selector
* @param {element} context
* @return {array}
*/
export function $$$ (selector, context = null) {
  if (!selector) return

  const elms = (context == null ? doc : context).querySelectorAll(selector)

  return Array.apply(null, elms)
}