You can check demo here.
All data saved in localStorage. Therefore, the data will be empty if you opened in a new browser.
This project was bootstrapped with Create React App.
You also can run locally. You need to clone this repo and a proper node.js installed in your system. Then you can execute the following script to run a developing environment.
npm install
npm start
You can also run unit tests.
npm run test
And also build as production files
npm run build