To debug the javascript code of your react app do the following:
Command + D and a webpage should open up at http://localhost:8081/debugger-ui. (Chrome only for now)Command + Option + I to open the Chrome Developer tools, or open it via View -> Developer -> Developer Tools.Install the React Developer Tools extension for Google Chrome. This will allow you to navigate the view hierarchy if you select the React tab when the developer tools are open.
To activate Live Reload do the following:
Control + Command + Z.Enable/Disable Live Reload, Reload and Enable/Disable Debugging options.