React Code Injection

react_inject.js

injc=(src,cbk) => { let script = document.createElement('script');script.src = src;document.getElementsByTagName('head')[0].appendChild(script);script.onload=()=>cbk() }
injc("https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js",() => injc("https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js",() => console.log("ready")))

Injector function definition:

let injc=(src,cbk) => { let script = document.createElement('script');script.src = src;document.getElementsByTagName('head')[0].appendChild(script);script.onload=()=>cbk() }

React lib code injection:

injc("https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js",() => injc("https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js",() => { console.log("Hello React")}))

To make it working it's important to use the React and ReactDom development build:

let injc=(src,cbk) => { let script = document.createElement('script');script.src = src;document.getElementsByTagName('head')[0].appendChild(script);script.onload=()=>cbk() }
injc("https://unpkg.com/react@16/umd/react.development.js",() => injc("https://unpkg.com/react-dom@16/umd/react-dom.development.js",() => { console.log("Hello")}))
ReactDOM.render('<Hello name="World" />', document.getElementById('container'));