Explizite Ressourcenverwaltung mittels Symbol.asyncDispose in benutzerdefinierten Svelte-Aktionen

export function asyncDisposableAction(node, asyncResourceFactory) {
  let resource;
  
  (async () => {
    resource = await asyncResourceFactory(node);
  })();
 
  return {
    async destroy() {
      if (resource && typeof resource[Symbol.asyncDispose] === 'function') {
        await resource[Symbol.asyncDispose]();
      } else if (resource?.close) {
        await resource.close();
      }
    }
  };
}