1.0, Polymer Starter Kit support

Polymer Starter Kit

With this release the application scaffold produced by the generator is now based on Polymer Starter Kit. Major highlights include:

• Polymer 1.0, Paper and Iron elements
• Material Design layout
• Routing with Page.js
• Unit testing with Web Component Tester
• Offline-first setup through Service Worker elements
• End-to-end Build Tooling (including Vulcanize)

Seed Element

In addition, the yo polymer:seed subgenerator has been updated to use the latest seed-element with automatic support for the updated iron-component-page (example).

Breaking Changes

• Grunt support has been dropped. This is because the project now uses PSK as the starting point and PSK is currently Gulp only.
• SASS support has been dropped in favor of CSS custom properties. Read more about working with custom properties. Custom properties are new web standards which expand the capabilities of CSS and, most importantly, obviate the need for using ::shadow and /deep/ to theme Web Components.