Uncaught ReferenceError: ReactDOM is not defined

Question

So i have Rails applications, i installed react-rails gem, set it up and try to run test application.

Freshly installed, when i tryed to run hello world program, this er

Answer 1

To make it work properly, you have to do 3 things.

1. Import the CDNs, necessary for the developement(Say react and react-dom for web development)

2. install babel-cli . It is needed for the compilation of JSX into vanila js

3. change the typo in your code,

it is ReactDOM , not RaactDOM