Dropdown button element for RHElements
npm install @rhelements/rh-dropdown-button

Make sure you have [Polyserve][polyserve] and [Web Component Tester][web-component-tester] installed.
npm install -g polyserve web-component-tester
npm start
npm run test
npm run build
Run npm start and the Polymer CLI will start a server and open your default browser to the demo page of the element.
Accordion (and all RHElements) use [Prettier][prettier] to auto-format JS and JSON. The style rules get applied when you commit a change. If you choose to, you can [integrate your editor][prettier-ed] with Prettier to have the style rules applied on every save.
[prettier]: https://github.com/prettier/prettier/
[prettier-ed]: https://github.com/prettier/prettier/#editor-integration
[polyserve]: https://github.com/Polymer/polyserve
[web-component-tester]: https://github.com/Polymer/web-component-tester