@ngxs/store - npm Package Compare versions

Comparing version 2.0.0-dev.af22aaf to 2.0.0-dev.b37ec92

bundles/ngxs-store.umd.js

 (function (global, factory) {
-	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core'), require('rxjs/BehaviorSubject'), require('rxjs/Observable'), require('rxjs/operators'), require('rxjs/observable/forkJoin'), require('rxjs/operators/map'), require('rxjs/observable/fromPromise'), require('rxjs/observable/of')) :
-	typeof define === 'function' && define.amd ? define('@ngxs/store', ['exports', '@angular/core', 'rxjs/BehaviorSubject', 'rxjs/Observable', 'rxjs/operators', 'rxjs/observable/forkJoin', 'rxjs/operators/map', 'rxjs/observable/fromPromise', 'rxjs/observable/of'], factory) :
-	(factory((global.ngxs = global.ngxs || {}, global.ngxs.store = {}),global.ng.core,global.Rx,global.Rx,global.Rx.Observable.prototype,global.Rx.Observable,global.Rx.Observable.prototype,global.Rx.Observable,global.Rx.Observable));
-}(this, (function (exports,core,BehaviorSubject,Observable,operators,forkJoin,map,fromPromise,of) { 'use strict';
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/core'), require('rxjs/Subject'), require('rxjs/BehaviorSubject'), require('rxjs/Observable'), require('rxjs/operators'), require('rxjs/observable/forkJoin'), require('rxjs/operators/map'), require('rxjs/observable/fromPromise'), require('rxjs/observable/of')) :
+	typeof define === 'function' && define.amd ? define('@ngxs/store', ['exports', '@angular/core', 'rxjs/Subject', 'rxjs/BehaviorSubject', 'rxjs/Observable', 'rxjs/operators', 'rxjs/observable/forkJoin', 'rxjs/operators/map', 'rxjs/observable/fromPromise', 'rxjs/observable/of'], factory) :
+	(factory((global.ngxs = global.ngxs || {}, global.ngxs.store = {}),global.ng.core,global.Rx,global.Rx,global.Rx,global.Rx.Observable.prototype,global.Rx.Observable,global.Rx.Observable.prototype,global.Rx.Observable,global.Rx.Observable));
+}(this, (function (exports,core,Subject,BehaviorSubject,Observable,operators,forkJoin,map,fromPromise,of) { 'use strict';
 
@@ -281,74 +281,96 @@ /*! *****************************************************************************
     };
-    StateFactory.prototype.addAndReturnDefaults = function (stores) {
-        return this.add(stores).reduce(function (result, meta) { return setValue(result, meta.depth, meta.defaults); }, {});
+    StateFactory.prototype.addAndReturnDefaults = function (stateKlasses) {
+        if (stateKlasses) {
+            var states = this.add(stateKlasses);
+            var defaults = states.reduce(function (result, meta) { return setValue(result, meta.depth, meta.defaults); }, {});
+            return { defaults: defaults, states: states };
+        }
     };
+    StateFactory.prototype.invokeInit = function (getState, setState, dispatch, stateMetadatas) {
+        try {
+            for (var stateMetadatas_1 = __values(stateMetadatas), stateMetadatas_1_1 = stateMetadatas_1.next(); !stateMetadatas_1_1.done; stateMetadatas_1_1 = stateMetadatas_1.next()) {
+                var metadata = stateMetadatas_1_1.value;
+                if (metadata.instance.onInit) {
+                    var stateContext = this.createStateContext(getState, setState, dispatch, metadata);
+                    metadata.instance.onInit(stateContext);
+                }
+            }
+        }
+        catch (e_2_1) { e_2 = { error: e_2_1 }; }
+        finally {
+            try {
+                if (stateMetadatas_1_1 && !stateMetadatas_1_1.done && (_a = stateMetadatas_1.return)) _a.call(stateMetadatas_1);
+            }
+            finally { if (e_2) throw e_2.error; }
+        }
+        var e_2, _a;
+    };
     StateFactory.prototype.invokeActions = function (getState, setState, dispatch, action) {
         var results = [];
-        var _loop_2 = function (metadata) {
-            var name = getActionTypeFromInstance(action);
-            var actionMetas = metadata.actions[name];
-            if (actionMetas) {
-                try {
-                    for (var actionMetas_1 = __values(actionMetas), actionMetas_1_1 = actionMetas_1.next(); !actionMetas_1_1.done; actionMetas_1_1 = actionMetas_1.next()) {
-                        var actionMeta = actionMetas_1_1.value;
-                        var stateContext = {
-                            getState: function () {
-                                var state = getState();
-                                return getValue(state, metadata.depth);
-                            },
-                            patchState: function (val) {
-                                if (Array.isArray(val)) {
-                                    throw new Error('Patching arrays is not supported.');
-                                }
-                                var state = getState();
-                                var local = getValue(state, metadata.depth);
-                                for (var k in val) {
-                                    local[k] = val[k];
-                                }
-                                state = setValue(state, metadata.depth, Object.assign({}, local));
-                                setState(state);
-                                return state;
-                            },
-                            setState: function (val) {
-                                var state = getState();
-                                state = setValue(state, metadata.depth, val);
-                                setState(state);
-                                return state;
-                            },
-                            dispatch: function (actions) {
-                                return dispatch(actions);
+        try {
+            for (var _a = __values(this.states), _b = _a.next(); !_b.done; _b = _a.next()) {
+                var metadata = _b.value;
+                var name = getActionTypeFromInstance(action);
+                var actionMetas = metadata.actions[name];
+                if (actionMetas) {
+                    try {
+                        for (var actionMetas_1 = __values(actionMetas), actionMetas_1_1 = actionMetas_1.next(); !actionMetas_1_1.done; actionMetas_1_1 = actionMetas_1.next()) {
+                            var actionMeta = actionMetas_1_1.value;
+                            var stateContext = this.createStateContext(getState, setState, dispatch, metadata);
+                            var result = metadata.instance[actionMeta.fn](stateContext, action);
+                            if (result) {
+                                results.push(result);
                             }
-                        };
-                        var result = metadata.instance[actionMeta.fn](stateContext, action);
-                        if (result) {
-                            results.push(result);
                         }
                     }
-                }
-                catch (e_2_1) { e_2 = { error: e_2_1 }; }
-                finally {
-                    try {
-                        if (actionMetas_1_1 && !actionMetas_1_1.done && (_a = actionMetas_1.return)) _a.call(actionMetas_1);
+                    catch (e_3_1) { e_3 = { error: e_3_1 }; }
+                    finally {
+                        try {
+                            if (actionMetas_1_1 && !actionMetas_1_1.done && (_c = actionMetas_1.return)) _c.call(actionMetas_1);
+                        }
+                        finally { if (e_3) throw e_3.error; }
                     }
-                    finally { if (e_2) throw e_2.error; }
                 }
             }
-            var e_2, _a;
-        };
-        try {
-            for (var _a = __values(this.states), _b = _a.next(); !_b.done; _b = _a.next()) {
-                var metadata = _b.value;
-                _loop_2(metadata);
-            }
         }
-        catch (e_3_1) { e_3 = { error: e_3_1 }; }
+        catch (e_4_1) { e_4 = { error: e_4_1 }; }
         finally {
             try {
-                if (_b && !_b.done && (_c = _a.return)) _c.call(_a);
+                if (_b && !_b.done && (_d = _a.return)) _d.call(_a);
             }
-            finally { if (e_3) throw e_3.error; }
+            finally { if (e_4) throw e_4.error; }
         }
         return results;
-        var e_3, _c;
+        var e_4, _d, e_3, _c;
     };
+    StateFactory.prototype.createStateContext = function (getState, setState, dispatch, metadata) {
+        return {
+            getState: function () {
+                var state = getState();
+                return getValue(state, metadata.depth);
+            },
+            patchState: function (val) {
+                if (Array.isArray(val)) {
+                    throw new Error('Patching arrays is not supported.');
+                }
+                var state = getState();
+                var local = getValue(state, metadata.depth);
+                for (var k in val) {
+                    local[k] = val[k];
+                }
+                state = setValue(state, metadata.depth, Object.assign({}, local));
+                setState(state);
+                return state;
+            },
+            setState: function (val) {
+                var state = getState();
+                state = setValue(state, metadata.depth, val);
+                setState(state);
+                return state;
+            },
+            dispatch: function (actions) {
+                return dispatch(actions);
+            }
+        };
+    };
     return StateFactory;
@@ -366,3 +388,3 @@ }());
     function Actions(parent) {
-        var _this = _super.call(this, {}) || this;
+        var _this = _super.call(this) || this;
         if (parent) {
@@ -374,3 +396,3 @@ Object.assign(_this, parent);
     return Actions;
-}(BehaviorSubject.BehaviorSubject));
+}(Subject.Subject));
 Actions.decorators = [
@@ -475,3 +497,8 @@ { type: core.Injectable },
         }
-        return this._stateStream.pipe(map.map(selector), operators.distinctUntilChanged());
+        return this._stateStream.pipe(map.map(selector), operators.catchError(function (err) {
+            if (err instanceof TypeError) {
+                return of.of(undefined);
+            }
+            throw err;
+        }), operators.distinctUntilChanged());
     };
@@ -516,3 +543,3 @@ Store.prototype.selectOnce = function (selector) {
         }
-        catch (e_4_1) { e_4 = { error: e_4_1 }; }
+        catch (e_5_1) { e_5 = { error: e_5_1 }; }
         finally {
@@ -522,6 +549,6 @@ try {
             }
-            finally { if (e_4) throw e_4.error; }
+            finally { if (e_5) throw e_5.error; }
         }
         return results;
-        var e_4, _a;
+        var e_5, _a;
     };
@@ -614,15 +641,13 @@ return Store;
 var NgxsRootModule = /** @class */ (function () {
-    function NgxsRootModule(_factory, _stateStream, store, select, states) {
-        this._factory = _factory;
-        this._stateStream = _stateStream;
-        this.initStates(states);
+    function NgxsRootModule(factory, stateStream, store, select, states) {
+        var results = factory.addAndReturnDefaults(states);
+        if (results) {
+            var cur = stateStream.getValue();
+            stateStream.next(Object.assign({}, cur, results.defaults));
+        }
         store.dispatch(new InitState());
+        if (results) {
+            factory.invokeInit(function () { return stateStream.getValue(); }, function (newState) { return stateStream.next(newState); }, function (actions) { return store.dispatch(actions); }, results.states);
+        }
     }
-    NgxsRootModule.prototype.initStates = function (states) {
-        if (states) {
-            var init = this._factory.addAndReturnDefaults(states);
-            var cur = this._stateStream.getValue();
-            this._stateStream.next(Object.assign({}, cur, init));
-        }
-    };
     return NgxsRootModule;
@@ -641,16 +666,14 @@ }());
 var NgxsFeatureModule = /** @class */ (function () {
-    function NgxsFeatureModule(root, store, _stateStream, _factory, states) {
-        this._stateStream = _stateStream;
-        this._factory = _factory;
+    function NgxsFeatureModule(store, stateStream, factory, states) {
         var flattenedStates = (([])).concat.apply((([])), __spread(states));
-        this.initStates(flattenedStates);
+        var results = factory.addAndReturnDefaults(flattenedStates);
+        if (results) {
+            var cur = stateStream.getValue();
+            stateStream.next(Object.assign({}, cur, results.defaults));
+        }
         store.dispatch(new UpdateState());
+        if (results) {
+            factory.invokeInit(function () { return stateStream.getValue(); }, function (newState) { return stateStream.next(newState); }, function (actions) { return store.dispatch(actions); }, results.states);
+        }
     }
-    NgxsFeatureModule.prototype.initStates = function (stores) {
-        if (stores) {
-            var init = this._factory.addAndReturnDefaults(stores);
-            var cur = this._stateStream.getValue();
-            this._stateStream.next(Object.assign({}, cur, init));
-        }
-    };
     return NgxsFeatureModule;
@@ -662,3 +685,2 @@ }());
 NgxsFeatureModule.ctorParameters = function () { return [
-    { type: NgxsRootModule, },
     { type: Store, },
@@ -731,3 +753,3 @@ { type: StateStream, },
         }
-        catch (e_5_1) { e_5 = { error: e_5_1 }; }
+        catch (e_6_1) { e_6 = { error: e_6_1 }; }
         finally {
@@ -737,5 +759,5 @@ try {
             }
-            finally { if (e_5) throw e_5.error; }
+            finally { if (e_6) throw e_6.error; }
         }
-        var e_5, _a;
+        var e_6, _a;
     };
@@ -793,3 +815,3 @@ }
     return function (target, key, descriptor) {
-        var metadata = target[META_KEY];
+        var metadata = ensureStoreMetadata(target);
         if (descriptor.value !== null) {
@@ -799,3 +821,11 @@ var prev_1 = descriptor.value;
                 var local = getValue(state, metadata.path);
-                return prev_1(local);
+                try {
+                    return prev_1(local);
+                }
+                catch (ex) {
+                    if (ex instanceof TypeError) {
+                        return undefined;
+                    }
+                    throw ex;
+                }
             };
@@ -802,0 +832,0 @@ return {

bundles/ngxs-store.umd.min.js

@@ -1,2 +0,2 @@
-!function(t,r){"object"==typeof exports&&"undefined"!=typeof module?r(exports,require("@angular/core"),require("rxjs/BehaviorSubject"),require("rxjs/Observable"),require("rxjs/operators"),require("rxjs/observable/forkJoin"),require("rxjs/operators/map"),require("rxjs/observable/fromPromise"),require("rxjs/observable/of")):"function"==typeof define&&define.amd?define("@ngxs/store",["exports","@angular/core","rxjs/BehaviorSubject","rxjs/Observable","rxjs/operators","rxjs/observable/forkJoin","rxjs/operators/map","rxjs/observable/fromPromise","rxjs/observable/of"],r):r((t.ngxs=t.ngxs||{},t.ngxs.store={}),t.ng.core,t.Rx,t.Rx,t.Rx.Observable.prototype,t.Rx.Observable,t.Rx.Observable.prototype,t.Rx.Observable,t.Rx.Observable)}(this,function(t,r,e,u,o,n,a,c,i){"use strict";var s=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,r){t.__proto__=r}||function(t,r){for(var e in r)r.hasOwnProperty(e)&&(t[e]=r[e])};function p(t,r){function e(){this.constructor=t}s(t,r),t.prototype=null===r?Object.create(r):(e.prototype=r.prototype,new e)}function m(t){var r="function"==typeof Symbol&&t[Symbol.iterator],e=0;return r?r.call(t):{next:function(){return t&&e>=t.length&&(t=void 0),{value:t&&t[e++],done:!t}}}}function f(t,r){var e="function"==typeof Symbol&&t[Symbol.iterator];if(!e)return t;var n,o,a=e.call(t),i=[];try{for(;(void 0===r||0<r--)&&!(n=a.next()).done;)i.push(n.value)}catch(s){o={error:s}}finally{try{n&&!n.done&&(e=a["return"])&&e.call(a)}finally{if(o)throw o.error}}return i}function S(){for(var t=[],r=0;r<arguments.length;r++)t=t.concat(f(arguments[r]));return t}var l=new r.InjectionToken("ROOT_STATE_TOKEN"),h=new r.InjectionToken("FEATURE_STATE_TOKEN"),j="NGXS_META",y=new r.InjectionToken("NGXS_PLUGINS");function d(t){if(!t.hasOwnProperty(j)){Object.defineProperty(t,j,{value:{name:null,actions:{},defaults:{},path:null,children:[]}})}return t[j]}function v(t){for(var r=t,e="store."+r[0],n=0,o=r.length,a=e;++n<o;)a=a+" && "+(e=e+"."+r[n]);return new Function("store","return "+a+";")}function b(t){return t.constructor.type?t.constructor.type:t.constructor.name?t.constructor.name:t.type?t.type:void 0}var g=function(t,r,e){t=Object.assign({},t);var n=r.split("."),o=n[n.length-1];return n.reduce(function(t,r){return t[r]=r===o?e:Object.assign({},t[r]),t&&t[r]},t),t},_=function(t,r){return r.split(".").reduce(function(t,r){return t&&t[r]},t)},x=function(){function t(t,r){this._injector=t,this._parentFactory=r,this._states=[]}return Object.defineProperty(t.prototype,"states",{get:function(){return this._parentFactory?this._parentFactory.states:this._states},enumerable:!0,configurable:!0}),t.prototype.add=function(t){Array.isArray(t)||(t=[t]);var e,a,n,o,i,s,r,u,c,p=(a=function(r){var t=e.find(function(t){return t===r});if(!t)throw new Error("Child state not found: "+r);if(!t[j])throw new Error("States must be decorated with @State() decorator");return t[j].name},(e=t).reduce(function(t,r){if(!r[j])throw new Error("States must be decorated with @State() decorator");var e=r[j],n=e.name,o=e.children;return t[n]=(o||[]).map(a),t},{})),f=(n=p,o=[],i={},s=function(r,e){void 0===e&&(e=[]),Array.isArray(e)||(e=[]),e.push(r),i[r]=!0,n[r].forEach(function(t){if(0<=e.indexOf(t))throw new Error("Circular dependency '"+t+"' is required by '"+r+"': "+e.join(" -> "));i[t]||s(t,e.slice(0))}),o.indexOf(r)<0&&o.push(r)},Object.keys(n).forEach(function(t){return s(t)}),o.reverse()),l=function(t,r){void 0===r&&(r={});var o=function(t,r){for(var e in t)if(t.hasOwnProperty(e)&&0<=t[e].indexOf(r)){var n=o(t,e);return null!==n?n+"."+e:e}return null};for(var e in t)if(t.hasOwnProperty(e)){var n=o(t,e);r[e]=n?n+"."+e:e}return r}(p),h=t.reduce(function(t,r){if(!r[j])throw new Error("States must be decorated with @State() decorator");return t[r[j].name]=r,t},{}),y=[],d=function(r){var t=h[r];if(!t[j])throw new Error("States must be decorated with @State() decorator");var e,n=l[r],o=t[j].actions,a=t[j].defaults;if(t[j].path=n,v.states.find(function(t){return t.name===r}))throw new Error("Store has already been added: "+r);Array.isArray(a)?a=S(a):"object"==typeof(e=a)&&null!==e||"function"==typeof e?a=Object.assign({},a):a===undefined&&(a={});var i=v._injector.get(t);y.push({actions:o,instance:i,defaults:a,name:r,depth:n})},v=this;try{for(var b=m(f),g=b.next();!g.done;g=b.next()){d(g.value)}}catch(_){r={error:_}}finally{try{g&&!g.done&&(u=b["return"])&&u.call(b)}finally{if(r)throw r.error}}return(c=this.states).push.apply(c,S(y)),y},t.prototype.addAndReturnDefaults=function(t){return this.add(t).reduce(function(t,r){return g(t,r.depth,r.defaults)},{})},t.prototype.invokeActions=function(f,l,h,y){var t,r,d=[],e=function(o){var t,r,e=b(y),n=o.actions[e];if(n)try{for(var a=m(n),i=a.next();!i.done;i=a.next()){var s=i.value,u={getState:function(){var t=f();return _(t,o.depth)},patchState:function(t){if(Array.isArray(t))throw new Error("Patching arrays is not supported.");var r=f(),e=_(r,o.depth);for(var n in t)e[n]=t[n];return r=g(r,o.depth,Object.assign({},e)),l(r),r},setState:function(t){var r=f();return r=g(r,o.depth,t),l(r),r},dispatch:function(t){return h(t)}},c=o.instance[s.fn](u,y);c&&d.push(c)}}catch(p){t={error:p}}finally{try{i&&!i.done&&(r=a["return"])&&r.call(a)}finally{if(t)throw t.error}}};try{for(var n=m(this.states),o=n.next();!o.done;o=n.next()){e(o.value)}}catch(a){t={error:a}}finally{try{o&&!o.done&&(r=n["return"])&&r.call(n)}finally{if(t)throw t.error}}return d},t}();x.decorators=[{type:r.Injectable}],x.ctorParameters=function(){return[{type:r.Injector},{type:x,decorators:[{type:r.Optional},{type:r.SkipSelf}]}]};var w=function(e){function t(t){var r=e.call(this,{})||this;return t&&Object.assign(r,t),r}return p(t,e),t}(e.BehaviorSubject);w.decorators=[{type:r.Injectable}],w.ctorParameters=function(){return[{type:w,decorators:[{type:r.Optional},{type:r.SkipSelf}]}]};var O=function(e){return function(){for(var t=[],r=0;r<arguments.length;r++)t[r]=arguments[r];return e.shift().apply(void 0,S(t,[function(){for(var t=[],r=0;r<arguments.length;r++)t[r]=arguments[r];return O(e).apply(void 0,S(t))}]))}},A=function(e){function t(t){var r=e.call(this,{})||this;return t&&Object.assign(r,t),r}return p(t,e),t}(e.BehaviorSubject);A.decorators=[{type:r.Injectable}],A.ctorParameters=function(){return[{type:A,decorators:[{type:r.Optional},{type:r.SkipSelf}]}]};var P=function(){function t(t,r){this._parentManager=t,this._plugins=r,this.plugins=[],this.register()}return t.prototype.register=function(){var t;this._plugins&&(this.plugins=this._plugins.map(function(t){return t.handle?t.handle.bind(t):t}),this._parentManager&&(t=this._parentManager.plugins).push.apply(t,S(this.plugins)))},t}();P.decorators=[{type:r.Injectable}],P.ctorParameters=function(){return[{type:P,decorators:[{type:r.Optional},{type:r.SkipSelf}]},{type:Array,decorators:[{type:r.Inject,args:[y]},{type:r.Optional}]}]};var E=function(){function t(t,r,e,n,o){this._errorHandler=t,this._actions=r,this._storeFactory=e,this._pluginManager=n,this._stateStream=o}return t.prototype.dispatch=function(t){var r,e=this;return(r=Array.isArray(t)?n.forkJoin(t.map(function(t){return e._dispatch(t)})):this._dispatch(t)).pipe(o.catchError(function(t){return e._errorHandler.handleError(t),i.of(t)})),r.subscribe(),r},t.prototype.select=function(t){if(t[j]&&t[j].path){var r=v(t[j].path.split("."));return this._stateStream.pipe(a.map(r),o.distinctUntilChanged())}return this._stateStream.pipe(a.map(t),o.distinctUntilChanged())},t.prototype.selectOnce=function(t){return this.select(t).pipe(o.take(1))},t.prototype.subscribe=function(t){return this._stateStream.subscribe(t)},t.prototype._dispatch=function(t){var e=this,n=this._stateStream.getValue(),r=this._pluginManager.plugins;return O(S(r,[function(t,r){return t!==n&&e._stateStream.next(t),e._actions.next(r),e._dispatchActions(r).pipe(a.map(function(){return e._stateStream.getValue()}))}]))(n,t).pipe(o.shareReplay())},t.prototype._dispatchActions=function(t){var r=this,e=this._storeFactory.invokeActions(function(){return r._stateStream.getValue()},function(t){return r._stateStream.next(t)},function(t){return r.dispatch(t)},t);return(e.length?n.forkJoin(this._handleNesting(e)):i.of({})).pipe(o.shareReplay())},t.prototype._handleNesting=function(t){var r,e,n=[];try{for(var o=m(t),a=o.next();!a.done;a=o.next()){var i=a.value;i instanceof Promise&&(i=c.fromPromise(i)),i instanceof u.Observable&&n.push(i)}}catch(s){r={error:s}}finally{try{a&&!a.done&&(e=o["return"])&&e.call(o)}finally{if(r)throw r.error}}return n},t}();E.decorators=[{type:r.Injectable}],E.ctorParameters=function(){return[{type:r.ErrorHandler},{type:w},{type:x},{type:P},{type:A}]};var I=function(t){};I.store=undefined,I.decorators=[{type:r.Injectable}],I.ctorParameters=function(){return[{type:E}]};var k=function(){};k.type="@@INIT";var T=function(){};T.type="@@UPDATE_STATE";var R=function(){function t(t,r,e,n,o){this._factory=t,this._stateStream=r,this.initStates(o),e.dispatch(new k)}return t.prototype.initStates=function(t){if(t){var r=this._factory.addAndReturnDefaults(t),e=this._stateStream.getValue();this._stateStream.next(Object.assign({},e,r))}},t}();R.decorators=[{type:r.NgModule}],R.ctorParameters=function(){return[{type:x},{type:A},{type:E},{type:I},{type:Array,decorators:[{type:r.Optional},{type:r.Inject,args:[l]}]}]};var M=function(){function t(t,r,e,n,o){this._stateStream=e,this._factory=n;var a=[].concat.apply([],S(o));this.initStates(a),r.dispatch(new T)}return t.prototype.initStates=function(t){if(t){var r=this._factory.addAndReturnDefaults(t),e=this._stateStream.getValue();this._stateStream.next(Object.assign({},e,r))}},t}();M.decorators=[{type:r.NgModule,args:[{}]}],M.ctorParameters=function(){return[{type:R},{type:E},{type:A},{type:x},{type:Array,decorators:[{type:r.Optional},{type:r.Inject,args:[h]}]}]};var N=function(){function t(){}return t.forRoot=function(t){return void 0===t&&(t=[]),{ngModule:R,providers:S([x,w,E,A,I,P],t,[{provide:l,useValue:t}])}},t.forFeature=function(t){return{ngModule:M,providers:S([x,P],t,[{provide:h,multi:!0,useValue:t}])}},t}();N.decorators=[{type:r.NgModule,args:[{}]}],N.ctorParameters=function(){return[]},t.NgxsModule=N,t.Action=function(l){return function(t,r,e){var n,o,a,i=d(t.constructor);Array.isArray(l)||(l=[l]);try{for(var s=m(l),u=s.next();!u.done;u=s.next()){var c=u.value,p=(n=c).type?n.type:n.name?n.name:void 0;i.actions[p]||(i.actions[p]=[]),i.actions[p].push({fn:r,type:p})}}catch(f){o={error:f}}finally{try{u&&!u.done&&(a=s["return"])&&a.call(s)}finally{if(o)throw o.error}}}},t.Store=E,t.State=function(n){return function(t){var r=d(t);if(t.__proto__.hasOwnProperty(j)){var e=t.__proto__[j];r.actions=Object.assign({},r.actions,e.actions)}if(r.children=n.children,r.defaults=n.defaults,r.name=n.name,!n.name)throw new Error("States must register a 'name' property")}},t.Select=function(n){for(var o=[],t=1;t<arguments.length;t++)o[t-1]=arguments[t];return function(t,r){var e="__"+r+"__selector";if(n||(n=r.lastIndexOf("$")===r.length-1?r.substring(0,r.length-1):r),t[e])throw new Error("You cannot use @Select decorator and a "+e+" property.");delete t[r]&&(Object.defineProperty(t,e,{writable:!0,enumerable:!1,configurable:!0}),Object.defineProperty(t,r,{get:function(){return this[e]||(this[e]=function(t){var r=I.store;if(!r)throw new Error("SelectFactory not connected to store!");return r.select(t)}.apply(this,["string"==typeof n?v(o.length?S([n],o):n.split(".")):n[j]&&n[j].path?v(n[j].path.split(".")):n]))},enumerable:!0,configurable:!0}))}},t.Actions=w,t.ofAction=function(){for(var t=[],r=0;r<arguments.length;r++)t[r]=arguments[r];var e={};return t.forEach(function(t){return e[t.type||t.name]=!0}),o.filter(function(t){return e[t.constructor.type||t.constructor.name]})},t.Selector=function(){for(var i=[],t=0;t<arguments.length;t++)i[t]=arguments[t];return function(t,r,e){var n=t[j];if(null!==e.value){var o=e.value,a=function(t){var r=_(t,n.path);return o(r)};return{configurable:!0,get:function(){return function(a,i){var s=function(){for(var t=[],r=0;r<arguments.length;r++)t[r]=arguments[r];var e=i?i.apply(this,t):t[0],n=s.cache;if(n.has(e))return n.get(e);var o=a.apply(this,t);return s.cache=n.set(e,o)||n,o};return s.cache=new WeakMap,s}.apply(null,S([a],i))}}}throw new Error("Selectors only work on methods")}},t.getActionTypeFromInstance=b,t.NGXS_PLUGINS=y,t.StateStream=A,t.setValue=g,t.getValue=_,t.InitState=k,t.UpdateState=T,t.ɵb=M,t.ɵa=R,t.ɵg=P,t.ɵc=I,t.ɵf=x,t.ɵe=h,t.ɵd=l,Object.defineProperty(t,"__esModule",{value:!0})});
+!function(t,r){"object"==typeof exports&&"undefined"!=typeof module?r(exports,require("@angular/core"),require("rxjs/Subject"),require("rxjs/BehaviorSubject"),require("rxjs/Observable"),require("rxjs/operators"),require("rxjs/observable/forkJoin"),require("rxjs/operators/map"),require("rxjs/observable/fromPromise"),require("rxjs/observable/of")):"function"==typeof define&&define.amd?define("@ngxs/store",["exports","@angular/core","rxjs/Subject","rxjs/BehaviorSubject","rxjs/Observable","rxjs/operators","rxjs/observable/forkJoin","rxjs/operators/map","rxjs/observable/fromPromise","rxjs/observable/of"],r):r((t.ngxs=t.ngxs||{},t.ngxs.store={}),t.ng.core,t.Rx,t.Rx,t.Rx,t.Rx.Observable.prototype,t.Rx.Observable,t.Rx.Observable.prototype,t.Rx.Observable,t.Rx.Observable)}(this,function(t,r,e,n,c,o,a,i,s,u){"use strict";var f=Object.setPrototypeOf||{__proto__:[]}instanceof Array&&function(t,r){t.__proto__=r}||function(t,r){for(var e in r)r.hasOwnProperty(e)&&(t[e]=r[e])};function p(t,r){function e(){this.constructor=t}f(t,r),t.prototype=null===r?Object.create(r):(e.prototype=r.prototype,new e)}function S(t){var r="function"==typeof Symbol&&t[Symbol.iterator],e=0;return r?r.call(t):{next:function(){return t&&e>=t.length&&(t=void 0),{value:t&&t[e++],done:!t}}}}function l(t,r){var e="function"==typeof Symbol&&t[Symbol.iterator];if(!e)return t;var n,o,a=e.call(t),i=[];try{for(;(void 0===r||0<r--)&&!(n=a.next()).done;)i.push(n.value)}catch(u){o={error:u}}finally{try{n&&!n.done&&(e=a["return"])&&e.call(a)}finally{if(o)throw o.error}}return i}function _(){for(var t=[],r=0;r<arguments.length;r++)t=t.concat(l(arguments[r]));return t}var y=new r.InjectionToken("ROOT_STATE_TOKEN"),d=new r.InjectionToken("FEATURE_STATE_TOKEN"),x="NGXS_META",h=new r.InjectionToken("NGXS_PLUGINS");function v(t){if(!t.hasOwnProperty(x)){Object.defineProperty(t,x,{value:{name:null,actions:{},defaults:{},path:null,children:[]}})}return t[x]}function b(t){for(var r=t,e="store."+r[0],n=0,o=r.length,a=e;++n<o;)a=a+" && "+(e=e+"."+r[n]);return new Function("store","return "+a+";")}function j(t){return t.constructor.type?t.constructor.type:t.constructor.name?t.constructor.name:t.type?t.type:void 0}var g=function(t,r,e){t=Object.assign({},t);var n=r.split("."),o=n[n.length-1];return n.reduce(function(t,r){return t[r]=r===o?e:Object.assign({},t[r]),t&&t[r]},t),t},m=function(t,r){return r.split(".").reduce(function(t,r){return t&&t[r]},t)},w=function(){function t(t,r){this._injector=t,this._parentFactory=r,this._states=[]}return Object.defineProperty(t.prototype,"states",{get:function(){return this._parentFactory?this._parentFactory.states:this._states},enumerable:!0,configurable:!0}),t.prototype.add=function(t){Array.isArray(t)||(t=[t]);var e,a,n,o,i,u,r,c,s,f=(a=function(r){var t=e.find(function(t){return t===r});if(!t)throw new Error("Child state not found: "+r);if(!t[x])throw new Error("States must be decorated with @State() decorator");return t[x].name},(e=t).reduce(function(t,r){if(!r[x])throw new Error("States must be decorated with @State() decorator");var e=r[x],n=e.name,o=e.children;return t[n]=(o||[]).map(a),t},{})),p=(n=f,o=[],i={},u=function(r,e){void 0===e&&(e=[]),Array.isArray(e)||(e=[]),e.push(r),i[r]=!0,n[r].forEach(function(t){if(0<=e.indexOf(t))throw new Error("Circular dependency '"+t+"' is required by '"+r+"': "+e.join(" -> "));i[t]||u(t,e.slice(0))}),o.indexOf(r)<0&&o.push(r)},Object.keys(n).forEach(function(t){return u(t)}),o.reverse()),l=function(t,r){void 0===r&&(r={});var o=function(t,r){for(var e in t)if(t.hasOwnProperty(e)&&0<=t[e].indexOf(r)){var n=o(t,e);return null!==n?n+"."+e:e}return null};for(var e in t)if(t.hasOwnProperty(e)){var n=o(t,e);r[e]=n?n+"."+e:e}return r}(f),y=t.reduce(function(t,r){if(!r[x])throw new Error("States must be decorated with @State() decorator");return t[r[x].name]=r,t},{}),d=[],h=function(r){var t=y[r];if(!t[x])throw new Error("States must be decorated with @State() decorator");var e,n=l[r],o=t[x].actions,a=t[x].defaults;if(t[x].path=n,v.states.find(function(t){return t.name===r}))throw new Error("Store has already been added: "+r);Array.isArray(a)?a=_(a):"object"==typeof(e=a)&&null!==e||"function"==typeof e?a=Object.assign({},a):a===undefined&&(a={});var i=v._injector.get(t);d.push({actions:o,instance:i,defaults:a,name:r,depth:n})},v=this;try{for(var b=S(p),g=b.next();!g.done;g=b.next()){h(g.value)}}catch(m){r={error:m}}finally{try{g&&!g.done&&(c=b["return"])&&c.call(b)}finally{if(r)throw r.error}}return(s=this.states).push.apply(s,_(d)),d},t.prototype.addAndReturnDefaults=function(t){if(t){var r=this.add(t);return{defaults:r.reduce(function(t,r){return g(t,r.depth,r.defaults)},{}),states:r}}},t.prototype.invokeInit=function(t,r,e,n){try{for(var o=S(n),a=o.next();!a.done;a=o.next()){var i=a.value;if(i.instance.onInit){var u=this.createStateContext(t,r,e,i);i.instance.onInit(u)}}}catch(f){c={error:f}}finally{try{a&&!a.done&&(s=o["return"])&&s.call(o)}finally{if(c)throw c.error}}var c,s},t.prototype.invokeActions=function(t,r,e,n){var o,a,i,u,c=[];try{for(var s=S(this.states),f=s.next();!f.done;f=s.next()){var p=f.value,l=j(n),y=p.actions[l];if(y)try{for(var d=S(y),h=d.next();!h.done;h=d.next()){var v=h.value,b=this.createStateContext(t,r,e,p),g=p.instance[v.fn](b,n);g&&c.push(g)}}catch(m){i={error:m}}finally{try{h&&!h.done&&(u=d["return"])&&u.call(d)}finally{if(i)throw i.error}}}}catch(_){o={error:_}}finally{try{f&&!f.done&&(a=s["return"])&&a.call(s)}finally{if(o)throw o.error}}return c},t.prototype.createStateContext=function(o,a,r,i){return{getState:function(){var t=o();return m(t,i.depth)},patchState:function(t){if(Array.isArray(t))throw new Error("Patching arrays is not supported.");var r=o(),e=m(r,i.depth);for(var n in t)e[n]=t[n];return r=g(r,i.depth,Object.assign({},e)),a(r),r},setState:function(t){var r=o();return r=g(r,i.depth,t),a(r),r},dispatch:function(t){return r(t)}}},t}();w.decorators=[{type:r.Injectable}],w.ctorParameters=function(){return[{type:r.Injector},{type:w,decorators:[{type:r.Optional},{type:r.SkipSelf}]}]};var O=function(e){function t(t){var r=e.call(this)||this;return t&&Object.assign(r,t),r}return p(t,e),t}(e.Subject);O.decorators=[{type:r.Injectable}],O.ctorParameters=function(){return[{type:O,decorators:[{type:r.Optional},{type:r.SkipSelf}]}]};var A=function(e){return function(){for(var t=[],r=0;r<arguments.length;r++)t[r]=arguments[r];return e.shift().apply(void 0,_(t,[function(){for(var t=[],r=0;r<arguments.length;r++)t[r]=arguments[r];return A(e).apply(void 0,_(t))}]))}},E=function(e){function t(t){var r=e.call(this,{})||this;return t&&Object.assign(r,t),r}return p(t,e),t}(n.BehaviorSubject);E.decorators=[{type:r.Injectable}],E.ctorParameters=function(){return[{type:E,decorators:[{type:r.Optional},{type:r.SkipSelf}]}]};var P=function(){function t(t,r){this._parentManager=t,this._plugins=r,this.plugins=[],this.register()}return t.prototype.register=function(){var t;this._plugins&&(this.plugins=this._plugins.map(function(t){return t.handle?t.handle.bind(t):t}),this._parentManager&&(t=this._parentManager.plugins).push.apply(t,_(this.plugins)))},t}();P.decorators=[{type:r.Injectable}],P.ctorParameters=function(){return[{type:P,decorators:[{type:r.Optional},{type:r.SkipSelf}]},{type:Array,decorators:[{type:r.Inject,args:[h]},{type:r.Optional}]}]};var I=function(){function t(t,r,e,n,o){this._errorHandler=t,this._actions=r,this._storeFactory=e,this._pluginManager=n,this._stateStream=o}return t.prototype.dispatch=function(t){var r,e=this;return(r=Array.isArray(t)?a.forkJoin(t.map(function(t){return e._dispatch(t)})):this._dispatch(t)).pipe(o.catchError(function(t){return e._errorHandler.handleError(t),u.of(t)})),r.subscribe(),r},t.prototype.select=function(t){if(t[x]&&t[x].path){var r=b(t[x].path.split("."));return this._stateStream.pipe(i.map(r),o.distinctUntilChanged())}return this._stateStream.pipe(i.map(t),o.catchError(function(t){if(t instanceof TypeError)return u.of(undefined);throw t}),o.distinctUntilChanged())},t.prototype.selectOnce=function(t){return this.select(t).pipe(o.take(1))},t.prototype.subscribe=function(t){return this._stateStream.subscribe(t)},t.prototype._dispatch=function(t){var e=this,n=this._stateStream.getValue(),r=this._pluginManager.plugins;return A(_(r,[function(t,r){return t!==n&&e._stateStream.next(t),e._actions.next(r),e._dispatchActions(r).pipe(i.map(function(){return e._stateStream.getValue()}))}]))(n,t).pipe(o.shareReplay())},t.prototype._dispatchActions=function(t){var r=this,e=this._storeFactory.invokeActions(function(){return r._stateStream.getValue()},function(t){return r._stateStream.next(t)},function(t){return r.dispatch(t)},t);return(e.length?a.forkJoin(this._handleNesting(e)):u.of({})).pipe(o.shareReplay())},t.prototype._handleNesting=function(t){var r,e,n=[];try{for(var o=S(t),a=o.next();!a.done;a=o.next()){var i=a.value;i instanceof Promise&&(i=s.fromPromise(i)),i instanceof c.Observable&&n.push(i)}}catch(u){r={error:u}}finally{try{a&&!a.done&&(e=o["return"])&&e.call(o)}finally{if(r)throw r.error}}return n},t}();I.decorators=[{type:r.Injectable}],I.ctorParameters=function(){return[{type:r.ErrorHandler},{type:O},{type:w},{type:P},{type:E}]};var k=function(t){};k.store=undefined,k.decorators=[{type:r.Injectable}],k.ctorParameters=function(){return[{type:I}]};var T=function(){};T.type="@@INIT";var R=function(){};R.type="@@UPDATE_STATE";var M=function(t,r,e,n,o){var a=t.addAndReturnDefaults(o);if(a){var i=r.getValue();r.next(Object.assign({},i,a.defaults))}e.dispatch(new T),a&&t.invokeInit(function(){return r.getValue()},function(t){return r.next(t)},function(t){return e.dispatch(t)},a.states)};M.decorators=[{type:r.NgModule}],M.ctorParameters=function(){return[{type:w},{type:E},{type:I},{type:k},{type:Array,decorators:[{type:r.Optional},{type:r.Inject,args:[y]}]}]};var N=function(r,e,t,n){var o=[].concat.apply([],_(n)),a=t.addAndReturnDefaults(o);if(a){var i=e.getValue();e.next(Object.assign({},i,a.defaults))}r.dispatch(new R),a&&t.invokeInit(function(){return e.getValue()},function(t){return e.next(t)},function(t){return r.dispatch(t)},a.states)};N.decorators=[{type:r.NgModule,args:[{}]}],N.ctorParameters=function(){return[{type:I},{type:E},{type:w},{type:Array,decorators:[{type:r.Optional},{type:r.Inject,args:[d]}]}]};var V=function(){function t(){}return t.forRoot=function(t){return void 0===t&&(t=[]),{ngModule:M,providers:_([w,O,I,E,k,P],t,[{provide:y,useValue:t}])}},t.forFeature=function(t){return{ngModule:N,providers:_([w,P],t,[{provide:d,multi:!0,useValue:t}])}},t}();V.decorators=[{type:r.NgModule,args:[{}]}],V.ctorParameters=function(){return[]},t.NgxsModule=V,t.Action=function(l){return function(t,r,e){var n,o,a,i=v(t.constructor);Array.isArray(l)||(l=[l]);try{for(var u=S(l),c=u.next();!c.done;c=u.next()){var s=c.value,f=(n=s).type?n.type:n.name?n.name:void 0;i.actions[f]||(i.actions[f]=[]),i.actions[f].push({fn:r,type:f})}}catch(p){o={error:p}}finally{try{c&&!c.done&&(a=u["return"])&&a.call(u)}finally{if(o)throw o.error}}}},t.Store=I,t.State=function(n){return function(t){var r=v(t);if(t.__proto__.hasOwnProperty(x)){var e=t.__proto__[x];r.actions=Object.assign({},r.actions,e.actions)}if(r.children=n.children,r.defaults=n.defaults,r.name=n.name,!n.name)throw new Error("States must register a 'name' property")}},t.Select=function(n){for(var o=[],t=1;t<arguments.length;t++)o[t-1]=arguments[t];return function(t,r){var e="__"+r+"__selector";if(n||(n=r.lastIndexOf("$")===r.length-1?r.substring(0,r.length-1):r),t[e])throw new Error("You cannot use @Select decorator and a "+e+" property.");delete t[r]&&(Object.defineProperty(t,e,{writable:!0,enumerable:!1,configurable:!0}),Object.defineProperty(t,r,{get:function(){return this[e]||(this[e]=function(t){var r=k.store;if(!r)throw new Error("SelectFactory not connected to store!");return r.select(t)}.apply(this,["string"==typeof n?b(o.length?_([n],o):n.split(".")):n[x]&&n[x].path?b(n[x].path.split(".")):n]))},enumerable:!0,configurable:!0}))}},t.Actions=O,t.ofAction=function(){for(var t=[],r=0;r<arguments.length;r++)t[r]=arguments[r];var e={};return t.forEach(function(t){return e[t.type||t.name]=!0}),o.filter(function(t){return e[t.constructor.type||t.constructor.name]})},t.Selector=function(){for(var i=[],t=0;t<arguments.length;t++)i[t]=arguments[t];return function(t,r,e){var n=v(t);if(null!==e.value){var o=e.value,a=function(t){var r=m(t,n.path);try{return o(r)}catch(e){if(e instanceof TypeError)return undefined;throw e}};return{configurable:!0,get:function(){return function(a,i){var u=function(){for(var t=[],r=0;r<arguments.length;r++)t[r]=arguments[r];var e=i?i.apply(this,t):t[0],n=u.cache;if(n.has(e))return n.get(e);var o=a.apply(this,t);return u.cache=n.set(e,o)||n,o};return u.cache=new WeakMap,u}.apply(null,_([a],i))}}}throw new Error("Selectors only work on methods")}},t.getActionTypeFromInstance=j,t.NGXS_PLUGINS=h,t.StateStream=E,t.setValue=g,t.getValue=m,t.InitState=T,t.UpdateState=R,t.ɵb=N,t.ɵa=M,t.ɵg=P,t.ɵc=k,t.ɵf=w,t.ɵe=d,t.ɵd=y,Object.defineProperty(t,"__esModule",{value:!0})});
 //# sourceMappingURL=ngxs-store.umd.min.js.map

esm2015/ngxs-store.js

 import { InjectionToken, Injector, Injectable, SkipSelf, Optional, Inject, ErrorHandler, NgModule } from '@angular/core';
+import { Subject } from 'rxjs/Subject';
 import { BehaviorSubject } from 'rxjs/BehaviorSubject';
@@ -370,7 +371,11 @@ import { Observable } from 'rxjs/Observable';
     /**
-     * @param {?} stores
+     * @param {?} stateKlasses
      * @return {?}
      */
-    addAndReturnDefaults(stores) {
-        return this.add(stores).reduce((result, meta) => setValue(result, meta.depth, meta.defaults), {});
+    addAndReturnDefaults(stateKlasses) {
+        if (stateKlasses) {
+            const /** @type {?} */ states = this.add(stateKlasses);
+            const /** @type {?} */ defaults = states.reduce((result, meta) => setValue(result, meta.depth, meta.defaults), {});
+            return { defaults, states };
+        }
     }
@@ -381,2 +386,17 @@ /**
      * @param {?} dispatch
+     * @param {?} stateMetadatas
+     * @return {?}
+     */
+    invokeInit(getState, setState, dispatch, stateMetadatas) {
+        for (const /** @type {?} */ metadata of stateMetadatas) {
+            if (metadata.instance.onInit) {
+                const /** @type {?} */ stateContext = this.createStateContext(getState, setState, dispatch, metadata);
+                metadata.instance.onInit(stateContext);
+            }
+        }
+    }
+    /**
+     * @param {?} getState
+     * @param {?} setState
+     * @param {?} dispatch
      * @param {?} action
@@ -392,45 +412,3 @@ * @return {?}
                 for (const /** @type {?} */ actionMeta of actionMetas) {
-                    const /** @type {?} */ stateContext = {
-                        /**
-                         * @return {?}
-                         */
-                        getState() {
-                            const /** @type {?} */ state = getState();
-                            return getValue(state, metadata.depth);
-                        },
-                        /**
-                         * @param {?} val
-                         * @return {?}
-                         */
-                        patchState(val) {
-                            if (Array.isArray(val)) {
-                                throw new Error('Patching arrays is not supported.');
-                            }
-                            let /** @type {?} */ state = getState();
-                            const /** @type {?} */ local = getValue(state, metadata.depth);
-                            for (const /** @type {?} */ k in val) {
-                                local[k] = val[k];
-                            }
-                            state = setValue(state, metadata.depth, Object.assign({}, local));
-                            setState(state);
-                            return state;
-                        },
-                        /**
-                         * @param {?} val
-                         * @return {?}
-                         */
-                        setState(val) {
-                            let /** @type {?} */ state = getState();
-                            state = setValue(state, metadata.depth, val);
-                            setState(state);
-                            return state;
-                        },
-                        /**
-                         * @param {?} actions
-                         * @return {?}
-                         */
-                        dispatch(actions) {
-                            return dispatch(actions);
-                        }
-                    };
+                    const /** @type {?} */ stateContext = this.createStateContext(getState, setState, dispatch, metadata);
                     const /** @type {?} */ result = metadata.instance[actionMeta.fn](stateContext, action);
@@ -445,2 +423,54 @@ if (result) {
     }
+    /**
+     * @param {?} getState
+     * @param {?} setState
+     * @param {?} dispatch
+     * @param {?} metadata
+     * @return {?}
+     */
+    createStateContext(getState, setState, dispatch, metadata) {
+        return {
+            /**
+             * @return {?}
+             */
+            getState() {
+                const /** @type {?} */ state = getState();
+                return getValue(state, metadata.depth);
+            },
+            /**
+             * @param {?} val
+             * @return {?}
+             */
+            patchState(val) {
+                if (Array.isArray(val)) {
+                    throw new Error('Patching arrays is not supported.');
+                }
+                let /** @type {?} */ state = getState();
+                const /** @type {?} */ local = getValue(state, metadata.depth);
+                for (const /** @type {?} */ k in val) {
+                    local[k] = val[k];
+                }
+                state = setValue(state, metadata.depth, Object.assign({}, local));
+                setState(state);
+                return state;
+            },
+            /**
+             * @param {?} val
+             * @return {?}
+             */
+            setState(val) {
+                let /** @type {?} */ state = getState();
+                state = setValue(state, metadata.depth, val);
+                setState(state);
+                return state;
+            },
+            /**
+             * @param {?} actions
+             * @return {?}
+             */
+            dispatch(actions) {
+                return dispatch(actions);
+            }
+        };
+    }
 }
@@ -462,5 +492,6 @@ StateFactory.decorators = [
  * Action stream that is emitted anytime an action is dispatched.
+ *
  * You can listen to this in services to react without stores.
  */
-class Actions extends BehaviorSubject {
+class Actions extends Subject {
     /**
@@ -470,3 +501,3 @@ * @param {?} parent
     constructor(parent) {
-        super({});
+        super();
         if (parent) {
@@ -632,3 +663,10 @@ Object.assign(this, parent);
         }
-        return this._stateStream.pipe(map(selector), distinctUntilChanged());
+        return this._stateStream.pipe(map(selector), catchError(err => {
+            // if error is TypeError we swallow it to prevent usual errors with property access
+            if (err instanceof TypeError) {
+                return of(undefined);
+            }
+            // rethrow other errors
+            throw err;
+        }), distinctUntilChanged());
     }
@@ -794,4 +832,4 @@ /**
     /**
-     * @param {?} _factory
-     * @param {?} _stateStream
+     * @param {?} factory
+     * @param {?} stateStream
      * @param {?} store
@@ -801,21 +839,15 @@ * @param {?} select
      */
-    constructor(_factory, _stateStream, store, select, states) {
-        this._factory = _factory;
-        this._stateStream = _stateStream;
-        this.initStates(states);
-        store.dispatch(new InitState());
-    }
-    /**
-     * @param {?} states
-     * @return {?}
-     */
-    initStates(states) {
-        if (states) {
-            // add stores to the state graph and return their defaults
-            const /** @type {?} */ init = this._factory.addAndReturnDefaults(states);
+    constructor(factory, stateStream, store, select, states) {
+        // add stores to the state graph and return their defaults
+        const /** @type {?} */ results = factory.addAndReturnDefaults(states);
+        if (results) {
             // get our current stream
-            const /** @type {?} */ cur = this._stateStream.getValue();
+            const /** @type {?} */ cur = stateStream.getValue();
             // set the state to the current + new
-            this._stateStream.next(Object.assign({}, cur, init));
+            stateStream.next(Object.assign({}, cur, results.defaults));
         }
+        store.dispatch(new InitState());
+        if (results) {
+            factory.invokeInit(() => stateStream.getValue(), newState => stateStream.next(newState), actions => store.dispatch(actions), results.states);
+        }
     }
@@ -836,30 +868,23 @@ }
     /**
-     * @param {?} root
      * @param {?} store
-     * @param {?} _stateStream
-     * @param {?} _factory
+     * @param {?} stateStream
+     * @param {?} factory
      * @param {?} states
      */
-    constructor(root, store, _stateStream, _factory, states) {
-        this._stateStream = _stateStream;
-        this._factory = _factory;
-        // since FEATURE_STATE_TOKEN is a multi token, we need to
+    constructor(store, stateStream, factory, states) {
+        // Since FEATURE_STATE_TOKEN is a multi token, we need to
         // flatten it [[Feature1State, Feature2State], [Feature3State]]
         const /** @type {?} */ flattenedStates = (/** @type {?} */ ([])).concat(...states);
-        this.initStates(flattenedStates);
-        store.dispatch(new UpdateState());
-    }
-    /**
-     * @param {?} stores
-     * @return {?}
-     */
-    initStates(stores) {
-        if (stores) {
-            // bind the stores
-            const /** @type {?} */ init = this._factory.addAndReturnDefaults(stores);
+        // add stores to the state graph and return their defaults
+        const /** @type {?} */ results = factory.addAndReturnDefaults(flattenedStates);
+        if (results) {
             // get our current stream
-            const /** @type {?} */ cur = this._stateStream.getValue();
+            const /** @type {?} */ cur = stateStream.getValue();
             // set the state to the current + new
-            this._stateStream.next(Object.assign({}, cur, init));
+            stateStream.next(Object.assign({}, cur, results.defaults));
         }
+        store.dispatch(new UpdateState());
+        if (results) {
+            factory.invokeInit(() => stateStream.getValue(), newState => stateStream.next(newState), actions => store.dispatch(actions), results.states);
+        }
     }
@@ -872,3 +897,2 @@ }
 NgxsFeatureModule.ctorParameters = () => [
-    { type: NgxsRootModule, },
     { type: Store, },
@@ -1037,3 +1061,3 @@ { type: StateStream, },
     return (target, key, descriptor) => {
-        const /** @type {?} */ metadata = target[META_KEY];
+        const /** @type {?} */ metadata = ensureStoreMetadata(target);
         if (descriptor.value !== null) {
@@ -1043,3 +1067,13 @@ const /** @type {?} */ prev = descriptor.value;
                 const /** @type {?} */ local = getValue(state, metadata.path);
-                return prev(local);
+                // if the lambda tries to access a something on the state that doesn't exist, it will throw a TypeError.
+                // since this is quite usual behaviour, we simply return undefined if so.
+                try {
+                    return prev(local);
+                }
+                catch (/** @type {?} */ ex) {
+                    if (ex instanceof TypeError) {
+                        return undefined;
+                    }
+                    throw ex;
+                }
             };
@@ -1046,0 +1080,0 @@ return {

esm5/ngxs-store.js

 import { __spread, __values, __extends } from 'tslib';
 import { InjectionToken, Injector, Injectable, SkipSelf, Optional, Inject, ErrorHandler, NgModule } from '@angular/core';
+import { Subject } from 'rxjs/Subject';
 import { BehaviorSubject } from 'rxjs/BehaviorSubject';
@@ -224,74 +225,96 @@ import { Observable } from 'rxjs/Observable';
     };
-    StateFactory.prototype.addAndReturnDefaults = function (stores) {
-        return this.add(stores).reduce(function (result, meta) { return setValue(result, meta.depth, meta.defaults); }, {});
+    StateFactory.prototype.addAndReturnDefaults = function (stateKlasses) {
+        if (stateKlasses) {
+            var states = this.add(stateKlasses);
+            var defaults = states.reduce(function (result, meta) { return setValue(result, meta.depth, meta.defaults); }, {});
+            return { defaults: defaults, states: states };
+        }
     };
+    StateFactory.prototype.invokeInit = function (getState, setState, dispatch, stateMetadatas) {
+        try {
+            for (var stateMetadatas_1 = __values(stateMetadatas), stateMetadatas_1_1 = stateMetadatas_1.next(); !stateMetadatas_1_1.done; stateMetadatas_1_1 = stateMetadatas_1.next()) {
+                var metadata = stateMetadatas_1_1.value;
+                if (metadata.instance.onInit) {
+                    var stateContext = this.createStateContext(getState, setState, dispatch, metadata);
+                    metadata.instance.onInit(stateContext);
+                }
+            }
+        }
+        catch (e_2_1) { e_2 = { error: e_2_1 }; }
+        finally {
+            try {
+                if (stateMetadatas_1_1 && !stateMetadatas_1_1.done && (_a = stateMetadatas_1.return)) _a.call(stateMetadatas_1);
+            }
+            finally { if (e_2) throw e_2.error; }
+        }
+        var e_2, _a;
+    };
     StateFactory.prototype.invokeActions = function (getState, setState, dispatch, action) {
         var results = [];
-        var _loop_2 = function (metadata) {
-            var name = getActionTypeFromInstance(action);
-            var actionMetas = metadata.actions[name];
-            if (actionMetas) {
-                try {
-                    for (var actionMetas_1 = __values(actionMetas), actionMetas_1_1 = actionMetas_1.next(); !actionMetas_1_1.done; actionMetas_1_1 = actionMetas_1.next()) {
-                        var actionMeta = actionMetas_1_1.value;
-                        var stateContext = {
-                            getState: function () {
-                                var state = getState();
-                                return getValue(state, metadata.depth);
-                            },
-                            patchState: function (val) {
-                                if (Array.isArray(val)) {
-                                    throw new Error('Patching arrays is not supported.');
-                                }
-                                var state = getState();
-                                var local = getValue(state, metadata.depth);
-                                for (var k in val) {
-                                    local[k] = val[k];
-                                }
-                                state = setValue(state, metadata.depth, Object.assign({}, local));
-                                setState(state);
-                                return state;
-                            },
-                            setState: function (val) {
-                                var state = getState();
-                                state = setValue(state, metadata.depth, val);
-                                setState(state);
-                                return state;
-                            },
-                            dispatch: function (actions) {
-                                return dispatch(actions);
+        try {
+            for (var _a = __values(this.states), _b = _a.next(); !_b.done; _b = _a.next()) {
+                var metadata = _b.value;
+                var name = getActionTypeFromInstance(action);
+                var actionMetas = metadata.actions[name];
+                if (actionMetas) {
+                    try {
+                        for (var actionMetas_1 = __values(actionMetas), actionMetas_1_1 = actionMetas_1.next(); !actionMetas_1_1.done; actionMetas_1_1 = actionMetas_1.next()) {
+                            var actionMeta = actionMetas_1_1.value;
+                            var stateContext = this.createStateContext(getState, setState, dispatch, metadata);
+                            var result = metadata.instance[actionMeta.fn](stateContext, action);
+                            if (result) {
+                                results.push(result);
                             }
-                        };
-                        var result = metadata.instance[actionMeta.fn](stateContext, action);
-                        if (result) {
-                            results.push(result);
                         }
                     }
-                }
-                catch (e_2_1) { e_2 = { error: e_2_1 }; }
-                finally {
-                    try {
-                        if (actionMetas_1_1 && !actionMetas_1_1.done && (_a = actionMetas_1.return)) _a.call(actionMetas_1);
+                    catch (e_3_1) { e_3 = { error: e_3_1 }; }
+                    finally {
+                        try {
+                            if (actionMetas_1_1 && !actionMetas_1_1.done && (_c = actionMetas_1.return)) _c.call(actionMetas_1);
+                        }
+                        finally { if (e_3) throw e_3.error; }
                     }
-                    finally { if (e_2) throw e_2.error; }
                 }
             }
-            var e_2, _a;
-        };
-        try {
-            for (var _a = __values(this.states), _b = _a.next(); !_b.done; _b = _a.next()) {
-                var metadata = _b.value;
-                _loop_2(metadata);
-            }
         }
-        catch (e_3_1) { e_3 = { error: e_3_1 }; }
+        catch (e_4_1) { e_4 = { error: e_4_1 }; }
         finally {
             try {
-                if (_b && !_b.done && (_c = _a.return)) _c.call(_a);
+                if (_b && !_b.done && (_d = _a.return)) _d.call(_a);
             }
-            finally { if (e_3) throw e_3.error; }
+            finally { if (e_4) throw e_4.error; }
         }
         return results;
-        var e_3, _c;
+        var e_4, _d, e_3, _c;
     };
+    StateFactory.prototype.createStateContext = function (getState, setState, dispatch, metadata) {
+        return {
+            getState: function () {
+                var state = getState();
+                return getValue(state, metadata.depth);
+            },
+            patchState: function (val) {
+                if (Array.isArray(val)) {
+                    throw new Error('Patching arrays is not supported.');
+                }
+                var state = getState();
+                var local = getValue(state, metadata.depth);
+                for (var k in val) {
+                    local[k] = val[k];
+                }
+                state = setValue(state, metadata.depth, Object.assign({}, local));
+                setState(state);
+                return state;
+            },
+            setState: function (val) {
+                var state = getState();
+                state = setValue(state, metadata.depth, val);
+                setState(state);
+                return state;
+            },
+            dispatch: function (actions) {
+                return dispatch(actions);
+            }
+        };
+    };
     return StateFactory;
@@ -309,3 +332,3 @@ }());
     function Actions(parent) {
-        var _this = _super.call(this, {}) || this;
+        var _this = _super.call(this) || this;
         if (parent) {
@@ -317,3 +340,3 @@ Object.assign(_this, parent);
     return Actions;
-}(BehaviorSubject));
+}(Subject));
 Actions.decorators = [
@@ -418,3 +441,8 @@ { type: Injectable },
         }
-        return this._stateStream.pipe(map(selector), distinctUntilChanged());
+        return this._stateStream.pipe(map(selector), catchError(function (err) {
+            if (err instanceof TypeError) {
+                return of(undefined);
+            }
+            throw err;
+        }), distinctUntilChanged());
     };
@@ -459,3 +487,3 @@ Store.prototype.selectOnce = function (selector) {
         }
-        catch (e_4_1) { e_4 = { error: e_4_1 }; }
+        catch (e_5_1) { e_5 = { error: e_5_1 }; }
         finally {
@@ -465,6 +493,6 @@ try {
             }
-            finally { if (e_4) throw e_4.error; }
+            finally { if (e_5) throw e_5.error; }
         }
         return results;
-        var e_4, _a;
+        var e_5, _a;
     };
@@ -557,15 +585,13 @@ return Store;
 var NgxsRootModule = /** @class */ (function () {
-    function NgxsRootModule(_factory, _stateStream, store, select, states) {
-        this._factory = _factory;
-        this._stateStream = _stateStream;
-        this.initStates(states);
+    function NgxsRootModule(factory, stateStream, store, select, states) {
+        var results = factory.addAndReturnDefaults(states);
+        if (results) {
+            var cur = stateStream.getValue();
+            stateStream.next(Object.assign({}, cur, results.defaults));
+        }
         store.dispatch(new InitState());
+        if (results) {
+            factory.invokeInit(function () { return stateStream.getValue(); }, function (newState) { return stateStream.next(newState); }, function (actions) { return store.dispatch(actions); }, results.states);
+        }
     }
-    NgxsRootModule.prototype.initStates = function (states) {
-        if (states) {
-            var init = this._factory.addAndReturnDefaults(states);
-            var cur = this._stateStream.getValue();
-            this._stateStream.next(Object.assign({}, cur, init));
-        }
-    };
     return NgxsRootModule;
@@ -584,16 +610,14 @@ }());
 var NgxsFeatureModule = /** @class */ (function () {
-    function NgxsFeatureModule(root, store, _stateStream, _factory, states) {
-        this._stateStream = _stateStream;
-        this._factory = _factory;
+    function NgxsFeatureModule(store, stateStream, factory, states) {
         var flattenedStates = (([])).concat.apply((([])), __spread(states));
-        this.initStates(flattenedStates);
+        var results = factory.addAndReturnDefaults(flattenedStates);
+        if (results) {
+            var cur = stateStream.getValue();
+            stateStream.next(Object.assign({}, cur, results.defaults));
+        }
         store.dispatch(new UpdateState());
+        if (results) {
+            factory.invokeInit(function () { return stateStream.getValue(); }, function (newState) { return stateStream.next(newState); }, function (actions) { return store.dispatch(actions); }, results.states);
+        }
     }
-    NgxsFeatureModule.prototype.initStates = function (stores) {
-        if (stores) {
-            var init = this._factory.addAndReturnDefaults(stores);
-            var cur = this._stateStream.getValue();
-            this._stateStream.next(Object.assign({}, cur, init));
-        }
-    };
     return NgxsFeatureModule;
@@ -605,3 +629,2 @@ }());
 NgxsFeatureModule.ctorParameters = function () { return [
-    { type: NgxsRootModule, },
     { type: Store, },
@@ -674,3 +697,3 @@ { type: StateStream, },
         }
-        catch (e_5_1) { e_5 = { error: e_5_1 }; }
+        catch (e_6_1) { e_6 = { error: e_6_1 }; }
         finally {
@@ -680,5 +703,5 @@ try {
             }
-            finally { if (e_5) throw e_5.error; }
+            finally { if (e_6) throw e_6.error; }
         }
-        var e_5, _a;
+        var e_6, _a;
     };
@@ -736,3 +759,3 @@ }
     return function (target, key, descriptor) {
-        var metadata = target[META_KEY];
+        var metadata = ensureStoreMetadata(target);
         if (descriptor.value !== null) {
@@ -742,3 +765,11 @@ var prev_1 = descriptor.value;
                 var local = getValue(state, metadata.path);
-                return prev_1(local);
+                try {
+                    return prev_1(local);
+                }
+                catch (ex) {
+                    if (ex instanceof TypeError) {
+                        return undefined;
+                    }
+                    throw ex;
+                }
             };
@@ -745,0 +776,0 @@ return {

ngxs-store.metadata.json

@@ -1,1 +0,1 @@
-{"__symbolic":"module","version":4,"metadata":{"ɵa":{"__symbolic":"class","decorators":[{"__symbolic":"call","expression":{"__symbolic":"reference","module":"@angular/core","name":"NgModule","line":11,"character":1}}],"members":{"__ctor__":[{"__symbolic":"constructor","parameterDecorators":[null,null,null,null,[{"__symbolic":"call","expression":{"__symbolic":"reference","module":"@angular/core","name":"Optional","line":18,"character":5}},{"__symbolic":"call","expression":{"__symbolic":"reference","module":"@angular/core","name":"Inject","line":19,"character":5},"arguments":[{"__symbolic":"reference","name":"ɵd"}]}]],"parameters":[{"__symbolic":"reference","name":"ɵf"},{"__symbolic":"reference","name":"StateStream"},{"__symbolic":"reference","name":"Store"},{"__symbolic":"reference","name":"ɵc"},{"__symbolic":"reference","name":"Array","arguments":[{"__symbolic":"reference","name":"any"}]}]}],"initStates":[{"__symbolic":"method"}]}},"ɵb":{"__symbolic":"class","decorators":[{"__symbolic":"call","expression":{"__symbolic":"reference","module":"@angular/core","name":"NgModule","line":40,"character":1},"arguments":[{}]}],"members":{"__ctor__":[{"__symbolic":"constructor","parameterDecorators":[null,null,null,null,[{"__symbolic":"call","expression":{"__symbolic":"reference","module":"@angular/core","name":"Optional","line":47,"character":5}},{"__symbolic":"call","expression":{"__symbolic":"reference","module":"@angular/core","name":"Inject","line":48,"character":5},"arguments":[{"__symbolic":"reference","name":"ɵe"}]}]],"parameters":[{"__symbolic":"reference","name":"ɵa"},{"__symbolic":"reference","name":"Store"},{"__symbolic":"reference","name":"StateStream"},{"__symbolic":"reference","name":"ɵf"},{"__symbolic":"reference","name":"Array","arguments":[{"__symbolic":"reference","name":"Array","arguments":[{"__symbolic":"reference","name":"any"}]}]}]}],"initStates":[{"__symbolic":"method"}]}},"ɵc":{"__symbolic":"class","decorators":[{"__symbolic":"call","expression":{"__symbolic":"reference","module":"@angular/core","name":"Injectable","line":6,"character":1}}],"members":{"__ctor__":[{"__symbolic":"constructor","parameters":[{"__symbolic":"reference","name":"Store"}]}]},"statics":{"store":{"__symbolic":"reference","name":"undefined"}}},"ɵd":{"__symbolic":"new","expression":{"__symbolic":"reference","module":"@angular/core","name":"InjectionToken","line":3,"character":36},"arguments":["ROOT_STATE_TOKEN"]},"ɵe":{"__symbolic":"new","expression":{"__symbolic":"reference","module":"@angular/core","name":"InjectionToken","line":4,"character":39},"arguments":["FEATURE_STATE_TOKEN"]},"NgxsModule":{"__symbolic":"class","decorators":[{"__symbolic":"call","expression":{"__symbolic":"reference","module":"@angular/core","name":"NgModule","line":72,"character":1},"arguments":[{}]}],"members":{},"statics":{"forRoot":{"__symbolic":"function","parameters":["states"],"defaults":[[]],"value":{"ngModule":{"__symbolic":"reference","name":"ɵa"},"providers":[{"__symbolic":"reference","name":"ɵf"},{"__symbolic":"reference","name":"Actions"},{"__symbolic":"reference","name":"Store"},{"__symbolic":"reference","name":"StateStream"},{"__symbolic":"reference","name":"ɵc"},{"__symbolic":"reference","name":"ɵg"},{"__symbolic":"spread","expression":{"__symbolic":"reference","name":"states"}},{"provide":{"__symbolic":"reference","name":"ɵd"},"useValue":{"__symbolic":"reference","name":"states"}}]}},"forFeature":{"__symbolic":"function","parameters":["states"],"value":{"ngModule":{"__symbolic":"reference","name":"ɵb"},"providers":[{"__symbolic":"reference","name":"ɵf"},{"__symbolic":"reference","name":"ɵg"},{"__symbolic":"spread","expression":{"__symbolic":"reference","name":"states"}},{"provide":{"__symbolic":"reference","name":"ɵe"},"multi":true,"useValue":{"__symbolic":"reference","name":"states"}}]}}}},"Action":{"__symbolic":"function","parameters":["actions"],"value":{"__symbolic":"error","message":"Lambda not supported","line":6,"character":9,"module":"./src/action"}},"Store":{"__symbolic":"class","decorators":[{"__symbolic":"call","expression":{"__symbolic":"reference","module":"@angular/core","name":"Injectable","line":17,"character":1}}],"members":{"__ctor__":[{"__symbolic":"constructor","parameters":[{"__symbolic":"reference","module":"@angular/core","name":"ErrorHandler","line":20,"character":27},{"__symbolic":"reference","name":"Actions"},{"__symbolic":"reference","name":"ɵf"},{"__symbolic":"reference","name":"ɵg"},{"__symbolic":"reference","name":"StateStream"}]}],"dispatch":[{"__symbolic":"method"}],"select":[{"__symbolic":"method"},{"__symbolic":"method"},{"__symbolic":"method"}],"selectOnce":[{"__symbolic":"method"},{"__symbolic":"method"},{"__symbolic":"method"}],"subscribe":[{"__symbolic":"method"}],"_dispatch":[{"__symbolic":"method"}],"_dispatchActions":[{"__symbolic":"method"}],"_handleNesting":[{"__symbolic":"method"}]}},"State":{"__symbolic":"function","parameters":["options"],"value":{"__symbolic":"error","message":"Lambda 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package.json

 {
   "name": "@ngxs/store",
-  "version": "2.0.0-dev.af22aaf",
+  "version": "2.0.0-dev.b37ec92",
   "license": "MIT",
@@ -5,0 +5,0 @@ "peerDependencies": {

src/actions-stream.d.ts

@@ -1,8 +0,9 @@
-import { BehaviorSubject } from 'rxjs/BehaviorSubject';
+import { Subject } from 'rxjs/Subject';
 /**
  * Action stream that is emitted anytime an action is dispatched.
+ *
  * You can listen to this in services to react without stores.
  */
-export declare class Actions extends BehaviorSubject<any> {
+export declare class Actions extends Subject<any> {
     constructor(parent: Actions);
 }

src/module.d.ts

@@ -7,12 +7,6 @@ import { ModuleWithProviders } from '@angular/core';
 export declare class NgxsRootModule {
-    private _factory;
-    private _stateStream;
-    constructor(_factory: StateFactory, _stateStream: StateStream, store: Store, select: SelectFactory, states: any[]);
-    initStates(states: any): void;
+    constructor(factory: StateFactory, stateStream: StateStream, store: Store, select: SelectFactory, states: any[]);
 }
 export declare class NgxsFeatureModule {
-    private _stateStream;
-    private _factory;
-    constructor(root: NgxsRootModule, store: Store, _stateStream: StateStream, _factory: StateFactory, states: any[][]);
-    initStates(stores: any): void;
+    constructor(store: Store, stateStream: StateStream, factory: StateFactory, states: any[][]);
 }
@@ -19,0 +13,0 @@ export declare class NgxsModule {

src/state-factory.d.ts

 import { Injector } from '@angular/core';
+import { Observable } from 'rxjs/Observable';
 export declare class StateFactory {
@@ -9,4 +10,14 @@ private _injector;
     add(states: any | any[]): any[];
-    addAndReturnDefaults(stores: any[]): any;
+    addAndReturnDefaults(stateKlasses: any[]): {
+        defaults: any;
+        states: any[];
+    };
+    invokeInit(getState: any, setState: any, dispatch: any, stateMetadatas: any): void;
     invokeActions(getState: any, setState: any, dispatch: any, action: any): any[];
+    createStateContext(getState: any, setState: any, dispatch: any, metadata: any): {
+        getState(): any;
+        patchState(val: any): void;
+        setState(val: any): any;
+        dispatch(actions: any): Observable<any>;
+    };
 }

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increased by3.46%

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