Web Components and the Polymer Project: Polymer 3.0 and beyond (Google I/O '18)

https://www.youtube.com/watch?v=7CUO7PyD5zA

Polymer 3.0

• bower.js => npm
• HTML Import => ESM
• polymer-cliをESM向けにアップデート（テスト環境やデプロイなど）
• v3の開発環境（starter kit, app, element）をcliに追加

npm install polymer-element

# sample
npm i -d @polymer/paper-checkbox

https://www.webcomponents.org/author/PolymerElements

polymer-cli

npm i -g polymer-cli
poymer-cli init

? Which starter template would you like to use?
? Application name polymer
? Main element name polymer-app
? Brief description of the application 

Library

• lit-htmlのアップデート

Toolbox

• PWA Starter Kitのアップデート
  • reduxの追加