text: const $ = function (filter) {
    let q = new Q()
    return q.get(filter)
  }
  
  class Q {
    constructor () {
      this.filter = ''
      this.nodes = window.document
    }
    get (filter) {
      this.filter += ' ' + filter
      this.nodes = document.querySelectorAll(this.filter)
      return this
    }
    each (f) {
      for (let node of this.nodes) {
        f(node)
      }
      return this
    }
  }
  