Had issues using componentWillUnmount with Chrome Extensions which were built on sites using React. componentWillUnmount would never trigger so all event listeners, etc, would still be active.
This makes sure that components in your app will call componentWillUnmount and also remove the app from the DOM, including the node that it was mounted to if you want.
yarn add chrome-ext-render
import createApp from 'chrome-ext-render'
import ReactDOM from 'react-dom'
let app;
// When you come to render app...
const node = document.getElementById('root');
app = createApp(<App />, node, ReactDOM.render);
// When you want to remove it just call app();
app();
You have to pass through the render method as I wanted to be able to use this method with other React like libraries such as Inferno and Preact.
If anyone finds a way to not need this, please let me know!