devextreme/dist/transpiled/integration/jquery/deferred.js

HTML5 JavaScript Component Suite for Responsive Web Development

'use strict';

var jQuery = require("jquery");
var deferredUtils = require("../../core/utils/deferred");
var useJQuery = require("./use_jquery")();
var compareVersion = require("../../core/utils/version").compare;

if (useJQuery) {
    var Deferred = jQuery.Deferred;
    var strategy = { Deferred: Deferred };

    strategy.when = compareVersion(jQuery.fn.jquery, [3]) < 0 ? jQuery.when : function (singleArg) {
        if (arguments.length === 0) {
            return new Deferred().resolve();
        } else if (arguments.length === 1) {
            return singleArg && singleArg.then ? singleArg : new Deferred().resolve(singleArg);
        } else {
            return jQuery.when.apply(jQuery, arguments);
        }
    };

    deferredUtils.setStrategy(strategy);
}