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

Formats your entire project with clang-format

Provide flexbox-based layouts

Utility classes to make building demo pages easier

Web Components Polyfills

A simple element to fixture DOM for tests

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

Generate TypeScript type declarations for Polymer components.