We just need to add one method to Web API: document.mutate(function(mutator) { mutator.changeAttributes(el,{...}); mutator.appendNodes(el,...);

We just need to add one method to Web API: document.mutate(function(mutator) { mutator.changeAttributes(el,{...}); mutator.appendNodes(el,...); ... }); The mutate will do transactional update as fast as possible.