@reactivex/rxjs/dist/amd/operator/toPromise.js

Reactive Extensions for modern JavaScript

define(["require", "exports", '../util/root'], function (require, exports, root_1) {
    "use strict";
    /**
     * @param PromiseCtor
     * @return {Promise<T>}
     * @method toPromise
     * @owner Observable
     */
    function toPromise(PromiseCtor) {
        var _this = this;
        if (!PromiseCtor) {
            if (root_1.root.Rx && root_1.root.Rx.config && root_1.root.Rx.config.Promise) {
                PromiseCtor = root_1.root.Rx.config.Promise;
            }
            else if (root_1.root.Promise) {
                PromiseCtor = root_1.root.Promise;
            }
        }
        if (!PromiseCtor) {
            throw new Error('no Promise impl found');
        }
        return new PromiseCtor(function (resolve, reject) {
            var value;
            _this.subscribe(function (x) { return value = x; }, function (err) { return reject(err); }, function () { return resolve(value); });
        });
    }
    exports.toPromise = toPromise;
});
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