Web Components v0 users have more time to upgrade to v1; but be sure and test.
lit-html and LitElement are two new libraries for building fast, interoperable components. lit-html provides lightning-fast templating. LitElement is a lightweight base class for building Web Components with lit-html templates.
Say goodbye to shadow-piercing CSS selectors.
Web Components are gaining cross-browser support, the community is growing in leaps and bounds, and there’s a brand-new Web Component catalog to find exactly the component you need.
With Chrome 54, you can now create your own custom HTML tag with and make re-usable web components with Custom Elements v1; it’s easier to send messages between open windows or tabs on the same origin with the
BroadcastChannel API; media experience get better on Android and foreign fetch is now available as an origin trial.
Add schema.org markup to your components and make them search engine friendly.
Building apps, the Polymer way.
The state of the Polymer Union.
A whirlwind tour of Web Components, Polymer and front-end tooling for them.
Polymer is a gateway into the amazing future of Web Components. Learn more about Web Components and Polymer from the Chrome Dev Summit