publish.js
1.1 KB
"use strict";
var Subject_1 = require('../Subject');
var multicast_1 = require('./multicast');
/* tslint:disable:max-line-length */
/**
* Returns a ConnectableObservable, which is a variety of Observable that waits until its connect method is called
* before it begins emitting items to those Observers that have subscribed to it.
*
* <img src="./img/publish.png" width="100%">
*
* @param {Function} Optional selector function which can use the multicasted source sequence as many times as needed,
* without causing multiple subscriptions to the source sequence.
* Subscribers to the given source will receive all notifications of the source from the time of the subscription on.
* @return a ConnectableObservable that upon connection causes the source Observable to emit items to its Observers.
* @method publish
* @owner Observable
*/
function publish(selector) {
return selector ? multicast_1.multicast.call(this, function () { return new Subject_1.Subject(); }, selector) :
multicast_1.multicast.call(this, new Subject_1.Subject());
}
exports.publish = publish;
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