yarn start
Runs the app in the development mode and it's available at http://localhost:3000 to view it in the browser.
yarn test
Launches the test runner in the interactive watch mode.
yarn build
Builds the app for production to the build folder.
It bundles React in production mode and optimizes the build for the best performance. The build is minified and the filenames include the hashes.
The widget was done as functional as possible given the time constrains. Further improvements would be to split the components more and setup cypress for integration and visual regression testing.