Hot Module Replacement (or HMR) is a Webpack feature that allows "on the fly" module updates for your app. Create-React-App uses webpack internally, but HMR working out-of-the-box only for for stylesheets (and not for React components). This episode discusses the reasoning behind this and shows two ways you can add Hot Module Replacement to projects created with Create-React-App.

Music by www.bensound.com