jquery - How to report an additional reject from inside Ajax done promise -

jquery - How to report an additional reject from inside Ajax done promise -

i looking best way prepare situation. need additional checks of returned ajax info cause _loadpanel promise operation "fail":

_loadpanel(url: string, data?: any) : jquerypromise<any> { homecoming $.ajax( { url: url, type: info ? "post" : "get", data: info }).done(function (html: string, textstatus: string) { // function exracts required info var $panel = extractpaneldata(html); if (!$panel.length) { // how cause reject here??? } }); }

you can't (below) promise returned ajax immutable , smells wrong anyway:

var promise = $.ajax({...}).done(function(...) { promise.reject("data failed promise"); });

is there simple way of doing not involve adding $.deferred() object or pattern?

attempts:

i have tried following, modify parent deferred object not compile:

var dfd = $.deferred(); var promise = dfd.promise(); promise = promise.then($.ajax( { cache: false, url: url, type: info ? "post" : "get", data: info }).done(...));

it allow me combine ajax promise deferred promise

supplied parameters not match signature of phone call target:type '(value: {}) => {}' requires phone call signature, type 'jqueryxhr' lacks one.

suggestions?

something cool:

not sure how known is, , not help problem (as returned immutable promise), appears can utilize $.when pass initial parameters first function

e.g. passing initial parameters $.ajax this:

$.when({ url: url, type: data? "post" : "get", data: info }).then($.ajax).done(function (html: string, textstatus: string)

or separate parameters this:

$.when("hello!", 22, "there!") .then(insertpanel);

this can have interesting benefits if result chained previous promises ajax phone call not longer run immediately, after previous steps complete.

there few thigns here:

.then chains promises , changes state. .done not chain promises, adds handler current promise , returns it.

so:

var xhr = $.ajax({...}); p = xhr.then(function(data){ // fail if check fails if(additionalchecksfail) homecoming $.deferred.reject(error("invalid request").promise(); homecoming data; // otherwise maintain same info }); p.then(function(data){ // run if info validation passed. });

jquery typescript promise