Rx.Observable.prototype.toPromise(promiseCtor)

Converts an existing observable sequence to an ES6 Compatible Promise.

参数

1. promiseCtor (Function): The constructor of the promise. If not provided, it looks for it in Rx.config.Promise.

返回值

(Promise): An ES6 compatible promise with the last value from the observable sequence.

例

var promise = Rx.Observable.return(42).toPromise(RSVP.Promise);

promise.then(console.log.bind(console));

// => 42

例 with config

Rx.config.Promise = RSVP.Promise;
var promise = Rx.Observable.return(42).toPromise();

promise.then(console.log.bind(console));

// => 42