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

A behavior that enables keybindings for greater a11y.

Provide flexbox-based layouts

Useful for sharing information across a DOM tree

Implements an element that has a checked attribute and can be added to a form

polymer-legacy-adapter

Enables a custom element to be included in an iron-form

Coordinates the flow of resizeable elements

Provides a set of behaviors for the iron elements

Fits an element inside another element

Adds a material design ripple to any container

Provides a behavior for an element that validates user input

An HTML import for Roboto

Webpack Virtual Modules

Common behaviors across the paper elements

CLI that analyzes web components

Allows to define a scroller target

An element that supports displaying an icon

A material design icon button

Lets you bind to a CSS media query