mini-react-dom/src/core/Suspense.js

A lightweight React-like DOM renderer with JSX, hooks, context, SSR and lazy support

export function Suspense({ fallback, children }) {
  try {
    return children;
  } catch (promise) {
    if (typeof window !== "undefined") {
      promise.then(() => {
        requestIdleCallback(() => {
          document.getElementById("root").innerHTML = "";
          render(rootElement, rootContainer);
        });
      });
    }
    return fallback;
  }
}