Improved lazy loading in React with suspense and error boundary.
Have you heard about react-content-loader? It's a SVG component to create placeholder loading, like Facebook cards loading or also known as skeleton UI.
React-Loading is a React-based Loading animation component library includes many exquisite and beautiful loading components.
React component to manipulate the favicon, as a loading or progress indicator, for now. The idea of "Favicon as DOM" is under construction.