RHElements Accordion Panel Element
npm install -g polyserve web-component-tester
npm run test
npm run build
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 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 with Prettier to have the style rules applied on every save.