$ yarn
$ yarn start
This command starts a local development server and open up a browser window. Most changes are reflected live without having to restart the server.
$ yarn build
This command generates static content into the build
directory and can be served using any static contents hosting service.
$ GIT_USER=<Your GitHub username> USE_SSH=true yarn deploy
If you are using GitHub pages for hosting, this command is a convenient way to build the website and push to the gh-pages
branch.
https://hackernoon.com/understanding-js-the-event-loop-959beae3ac40#ec22 check out above link for coercion and scop