polymerelements/iron-test-helpers

The Polymer library makes it easy to create your own web components. Give your element some markup and properties, and then use it on a site. Polymer provides features like dynamic templates and data binding to reduce the amount of boilerplate you need to write

Web Components Polyfills

Client-side dependencies for web-component-tester tests installed via npm.

Formats your entire project with clang-format

Generate TypeScript type declarations for Polymer components.