polymerelements/iron-menu-behavior

Manages a set of elements that can be selected

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

A behavior that enables keybindings for greater a11y.

Provide flexbox-based layouts

Formats your entire project with clang-format

Common (global) styles for Material Design elements.

Utility classes to help make testing easier

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

Web Components Polyfills

Generate TypeScript type declarations for Polymer components.