attrs.js

'use strict'

class Attrs extends Array {
  constructor(els, name) {
    super()
    Object.assign(this, {els, name})
  }
  get() {
    return Object.assign(this, this.els.map(el => el.getAttribute(name)))
  }
  set(value) {
    return this.els.each(el => el.setAttribute(this.name, value))
  }
  remove() {
    return this.els.each(el => el.removeAttribute(this.name))
  }
}

class Selecty extends Array {
  attr(name, value = null) {
    let attrs = new Attrs(this, name)
    if (value != null) {
      return attrs.set(value)
    }
    return attrs.get()
  }
  each(fn) {
    this.every((...args) => fn(...args) !== false)
    return this
  }
}