Prerequisites:

Initialize Infisical for your Create React App

# navigate to the root of your of your project 
cd /path/to/project

# then initialize infisical
infisical init

Start your application as usual but with Infisical

infisical run -- <your application start command>

# Example
infisical run -- npm run dev

React environment variables must be prefixed with REACT_APP_ to show up within the application