BehaviorSubject.js 1.46 KB
/** PURE_IMPORTS_START tslib,_Subject,_util_ObjectUnsubscribedError PURE_IMPORTS_END */
import * as tslib_1 from "tslib";
import { Subject } from './Subject';
import { ObjectUnsubscribedError } from './util/ObjectUnsubscribedError';
var BehaviorSubject = /*@__PURE__*/ (function (_super) {
    tslib_1.__extends(BehaviorSubject, _super);
    function BehaviorSubject(_value) {
        var _this = _super.call(this) || this;
        _this._value = _value;
        return _this;
    }
    Object.defineProperty(BehaviorSubject.prototype, "value", {
        get: function () {
            return this.getValue();
        },
        enumerable: true,
        configurable: true
    });
    BehaviorSubject.prototype._subscribe = function (subscriber) {
        var subscription = _super.prototype._subscribe.call(this, subscriber);
        if (subscription && !subscription.closed) {
            subscriber.next(this._value);
        }
        return subscription;
    };
    BehaviorSubject.prototype.getValue = function () {
        if (this.hasError) {
            throw this.thrownError;
        }
        else if (this.closed) {
            throw new ObjectUnsubscribedError();
        }
        else {
            return this._value;
        }
    };
    BehaviorSubject.prototype.next = function (value) {
        _super.prototype.next.call(this, this._value = value);
    };
    return BehaviorSubject;
}(Subject));
export { BehaviorSubject };
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