Dynamic Imports (import())

let moduleCache;

async function getModule() {
  if (!moduleCache) {
    moduleCache = await import('./heavy-module.js');
  }
  return moduleCache;
}

Module debouncing
Module memoization
This code demonstrates the module memoization pattern with dynamic imports: 1) The result of the dynamic import is cached after the first load, 2) Subsequent calls to getModule() return the cached module without reloading, 3) This prevents unnecessary network requests and parsing overhead, 4) It's particularly useful for heavy modules that are used repeatedly, 5) This pattern maintains a single instance of the module across the application, 6) It combines the benefits of dynamic loading with efficient reuse, 7) This approach is common when a module is expensive to load but not needed immediately, 8) The pattern can be extended to include cache invalidation when needed.
Module preloading
Module invalidation