Finally after 9 years from Alex Russell introduction to Web Components, we have reached the full support to this amazing technology. Now we can make custom, reusable, complex and encapsulated HTML tags to be used everywhere. Like much libraries or frameworks we have now a standard way to handle the state of ours components (Custom Elements Lifecycles) and, where Web Components aren't supported, we can use Polyfills. With the adoption of the Chromium engine by Microsoft Team, 2019 will be the year of Web Components.