Step 2

component.js

class CandidateImage extends HTMLElement {
  connectedCallback() {
    console.log('Adding a candidate!');
    this.innerHTML = '<img src="https://cdn-candidates.com/bernie.jpg" />';
  }
}

/**
 * Register our custom element
 */
window.addEventListener('DOMContentLoaded', () => {
  customElements.define('candidate-image', CandidateImage);
});