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// Define class
class Homepage {
  // Pass a CSS selector
  constructor(selector) {
    // Reference selector
    const elements = document.querySelectorAll(selector);
    // Get amount of elements
    this.length = elements.length;
    // Merge the constructor and elements
    Object.assign(this, elements);
  }
  // Pass a callback function
  each(callback) {
    // Iterate elements...
    for (let node of Array.from(this)) {
      // ...call callback function fore each element...
      callback.call(node);
    }
    // ...make the method chainable
    return this;
  }
  // Pass event and callback
  bind(event, callback) {
    // Iterate constructor...
    return this.each(function() {
      // ...regiter each element to the event and assign callback
      this.addEventListener(event, callback, false);
    });
  }
};

// Instantiate Homepage class
const likeHate = selector => new Homepage(selector);
// Callback rate()
const rate = e => {
  // Reference clicked element
  const tgt = e.target;
  // If the clicked has .btn class...
  if (tgt.matches('.btn')) {
    // ...get the clicked value...
    const val = e.target.value;
    // ...reference article#rate...
    const rate = document.getElementById('rate');
    // ...assign the value of clicked to [data-rate] of #rate
    rate.dataset.rate = val;
    // If the value of clicked is 'Superior' =  thumbs up/down
    let icon = val === 'Superior' ? '