Javascript promises deep in the stack -

i decided have fallback call server when creating model in case can't find value information available locally. want have async if possible, mean have make in chain of code consume , return promises?

i'm going use pseudo code illustrate point initially, call stack can little long , don't include things aren't central question. let me know if need more go on though.

function router() {     if (condition) {         controller.renderdocument(options);     } }  controller.renderdocument(options) {     documentcollection.findorcreatedocumentholder(options); }  documentcollection.findorcreatedocumentholder(options) {     var model = this.findorcreatedocument(options); }  documentcollection.otherfunction(options) {     // illustrate there's several entry points kind of functionality     var model = this.findorcreatedocument(options); }  documentcollection.findorcreatedocument(options) {     if (!options.type)         options.type = resolvetype(options);     // other things use found options.type     return model; }  resolvetype(options) {     var locallyresolved = resolvelocally(options);     if (locallyresolved)         return locallyresolved;     // try server fallback     var serverresolved = resolvefromserver(options.id);     return serverresolved; }  resolvelocally(options) {     return stuff; }  resolvefromserver(id) {     return ajaxrequestresult(); } 

obviously actual code bit longer , stuff.

it feels excessive make of use chaining promises sake of 1 possible ajax request down pipe, rare occurrence. other alternative make synchronous ajax request.

are options make use promises , whens, or make synchronous ajax request? there nicer alternative? i'm thinking of c#'s await keyword, i'm sure other languages have similar functionality.

i want have async if possible, mean have make in chain of code consume , return promises?

yes. potentially asynchronous must return promise, , must consumed if asynchronous (promises enforce anyway).

is other alternative make synchronous ajax request?

yes, , don't want that.

is there nicer alternative? i'm thinking of c#'s await keyword, i'm sure other languages have similar functionality.

in fact, async-await coming ecmascript well. doesn't make synchronous, rather syntactic sugar promises-everywhere.