Angular 7, Extension method with NgModel

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I have a global.d.ts file which has the following extension method declaration:

declare global {

    interface Object {

        isEmpty(this: Object): boolean;

    }

}

And an object-extension file which has the implementation:

Object.prototype.isEmpty = function (this: any) : boolean {

    return true;//some logic

};

in main.ts I import the object-extension file.
Extension method works just fine. BUT

When I have a component with [(ngModel)] in it (in an input tag), it yields the below error:

ERROR Error: Uncaught (in promise): Error: @Output isEmpty not initialized in 'NgModel'. Error: @Output isEmpty not initialized in 'NgModel'.

    at createDirectiveInstance (core.js:18560)

    at createViewNodes (core.js:19776)

    at callViewAction (core.js:20092)

    at execComponentViewsAction (core.js:20011)

    at createViewNodes (core.js:19804)

    at createRootView (core.js:19690)

    at callWithDebugContext (core.js:20722)

    at Object.debugCreateRootView [as createRootView] (core.js:20208)

    at ComponentFactory_.push../node_modules/@angular/core/fesm5/core.js.ComponentFactory_.create (core.js:18029)

    at ComponentFactoryBoundToModule.push../node_modules/@angular/core/fesm5/core.js.ComponentFactoryBoundToModule.create (core.js:7812)

    at createDirectiveInstance (core.js:18560)

    at createViewNodes (core.js:19776)

    at callViewAction (core.js:20092)

    at execComponentViewsAction (core.js:20011)

    at createViewNodes (core.js:19804)

    at createRootView (core.js:19690)

    at callWithDebugContext (core.js:20722)

    at Object.debugCreateRootView [as createRootView] (core.js:20208)

    at ComponentFactory_.push../node_modules/@angular/core/fesm5/core.js.ComponentFactory_.create (core.js:18029)

    at ComponentFactoryBoundToModule.push../node_modules/@angular/core/fesm5/core.js.ComponentFactoryBoundToModule.create (core.js:7812)

    at resolvePromise (zone.js:814)

    at resolvePromise (zone.js:771)

    at zone.js:873

    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:421)

    at Object.onInvokeTask (core.js:14134)

    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:420)

    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js:188)

    at drainMicroTaskQueue (zone.js:595)

edited Nov 16 at 17:32

Goncalo Peres

1,3011314

asked Nov 11 at 13:35

Ori Refael

1,21321644

add a comment |

up vote
1
down vote

favorite

I have a global.d.ts file which has the following extension method declaration:

declare global {

    interface Object {

        isEmpty(this: Object): boolean;

    }

}

And an object-extension file which has the implementation:

Object.prototype.isEmpty = function (this: any) : boolean {

    return true;//some logic

};

in main.ts I import the object-extension file.
Extension method works just fine. BUT

When I have a component with [(ngModel)] in it (in an input tag), it yields the below error:

ERROR Error: Uncaught (in promise): Error: @Output isEmpty not initialized in 'NgModel'. Error: @Output isEmpty not initialized in 'NgModel'.

    at createDirectiveInstance (core.js:18560)

    at createViewNodes (core.js:19776)

    at callViewAction (core.js:20092)

    at execComponentViewsAction (core.js:20011)

    at createViewNodes (core.js:19804)

    at createRootView (core.js:19690)

    at callWithDebugContext (core.js:20722)

    at Object.debugCreateRootView [as createRootView] (core.js:20208)

    at ComponentFactory_.push../node_modules/@angular/core/fesm5/core.js.ComponentFactory_.create (core.js:18029)

    at ComponentFactoryBoundToModule.push../node_modules/@angular/core/fesm5/core.js.ComponentFactoryBoundToModule.create (core.js:7812)

    at createDirectiveInstance (core.js:18560)

    at createViewNodes (core.js:19776)

    at callViewAction (core.js:20092)

    at execComponentViewsAction (core.js:20011)

    at createViewNodes (core.js:19804)

    at createRootView (core.js:19690)

    at callWithDebugContext (core.js:20722)

    at Object.debugCreateRootView [as createRootView] (core.js:20208)

    at ComponentFactory_.push../node_modules/@angular/core/fesm5/core.js.ComponentFactory_.create (core.js:18029)

    at ComponentFactoryBoundToModule.push../node_modules/@angular/core/fesm5/core.js.ComponentFactoryBoundToModule.create (core.js:7812)

    at resolvePromise (zone.js:814)

    at resolvePromise (zone.js:771)

    at zone.js:873

    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:421)

    at Object.onInvokeTask (core.js:14134)

    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:420)

    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js:188)

    at drainMicroTaskQueue (zone.js:595)

edited Nov 16 at 17:32

Goncalo Peres

1,3011314

asked Nov 11 at 13:35

Ori Refael

1,21321644

add a comment |

up vote
1
down vote

favorite

I have a global.d.ts file which has the following extension method declaration:

declare global {

    interface Object {

        isEmpty(this: Object): boolean;

    }

}

And an object-extension file which has the implementation:

Object.prototype.isEmpty = function (this: any) : boolean {

    return true;//some logic

};

in main.ts I import the object-extension file.
Extension method works just fine. BUT

When I have a component with [(ngModel)] in it (in an input tag), it yields the below error:

ERROR Error: Uncaught (in promise): Error: @Output isEmpty not initialized in 'NgModel'. Error: @Output isEmpty not initialized in 'NgModel'.

    at createDirectiveInstance (core.js:18560)

    at createViewNodes (core.js:19776)

    at callViewAction (core.js:20092)

    at execComponentViewsAction (core.js:20011)

    at createViewNodes (core.js:19804)

    at createRootView (core.js:19690)

    at callWithDebugContext (core.js:20722)

    at Object.debugCreateRootView [as createRootView] (core.js:20208)

    at ComponentFactory_.push../node_modules/@angular/core/fesm5/core.js.ComponentFactory_.create (core.js:18029)

    at ComponentFactoryBoundToModule.push../node_modules/@angular/core/fesm5/core.js.ComponentFactoryBoundToModule.create (core.js:7812)

    at createDirectiveInstance (core.js:18560)

    at createViewNodes (core.js:19776)

    at callViewAction (core.js:20092)

    at execComponentViewsAction (core.js:20011)

    at createViewNodes (core.js:19804)

    at createRootView (core.js:19690)

    at callWithDebugContext (core.js:20722)

    at Object.debugCreateRootView [as createRootView] (core.js:20208)

    at ComponentFactory_.push../node_modules/@angular/core/fesm5/core.js.ComponentFactory_.create (core.js:18029)

    at ComponentFactoryBoundToModule.push../node_modules/@angular/core/fesm5/core.js.ComponentFactoryBoundToModule.create (core.js:7812)

    at resolvePromise (zone.js:814)

    at resolvePromise (zone.js:771)

    at zone.js:873

    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:421)

    at Object.onInvokeTask (core.js:14134)

    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:420)

    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js:188)

    at drainMicroTaskQueue (zone.js:595)

edited Nov 16 at 17:32

Goncalo Peres

1,3011314

asked Nov 11 at 13:35

Ori Refael

1,21321644

I have a global.d.ts file which has the following extension method declaration:

declare global {

    interface Object {

        isEmpty(this: Object): boolean;

    }

}

And an object-extension file which has the implementation:

Object.prototype.isEmpty = function (this: any) : boolean {

    return true;//some logic

};

in main.ts I import the object-extension file.
Extension method works just fine. BUT

When I have a component with [(ngModel)] in it (in an input tag), it yields the below error:

ERROR Error: Uncaught (in promise): Error: @Output isEmpty not initialized in 'NgModel'. Error: @Output isEmpty not initialized in 'NgModel'.

    at createDirectiveInstance (core.js:18560)

    at createViewNodes (core.js:19776)

    at callViewAction (core.js:20092)

    at execComponentViewsAction (core.js:20011)

    at createViewNodes (core.js:19804)

    at createRootView (core.js:19690)

    at callWithDebugContext (core.js:20722)

    at Object.debugCreateRootView [as createRootView] (core.js:20208)

    at ComponentFactory_.push../node_modules/@angular/core/fesm5/core.js.ComponentFactory_.create (core.js:18029)

    at ComponentFactoryBoundToModule.push../node_modules/@angular/core/fesm5/core.js.ComponentFactoryBoundToModule.create (core.js:7812)

    at createDirectiveInstance (core.js:18560)

    at createViewNodes (core.js:19776)

    at callViewAction (core.js:20092)

    at execComponentViewsAction (core.js:20011)

    at createViewNodes (core.js:19804)

    at createRootView (core.js:19690)

    at callWithDebugContext (core.js:20722)

    at Object.debugCreateRootView [as createRootView] (core.js:20208)

    at ComponentFactory_.push../node_modules/@angular/core/fesm5/core.js.ComponentFactory_.create (core.js:18029)

    at ComponentFactoryBoundToModule.push../node_modules/@angular/core/fesm5/core.js.ComponentFactoryBoundToModule.create (core.js:7812)

    at resolvePromise (zone.js:814)

    at resolvePromise (zone.js:771)

    at zone.js:873

    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:421)

    at Object.onInvokeTask (core.js:14134)

    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:420)

    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js:188)

    at drainMicroTaskQueue (zone.js:595)

angular typescript angular6 angular7

edited Nov 16 at 17:32

Goncalo Peres

1,3011314

asked Nov 11 at 13:35

Ori Refael

1,21321644

edited Nov 16 at 17:32

Goncalo Peres

1,3011314

asked Nov 11 at 13:35

Ori Refael

1,21321644

edited Nov 16 at 17:32

Goncalo Peres

1,3011314

edited Nov 16 at 17:32

Goncalo Peres

1,3011314

edited Nov 16 at 17:32

Goncalo Peres

1,3011314

asked Nov 11 at 13:35

Ori Refael

1,21321644

asked Nov 11 at 13:35

Ori Refael

1,21321644

asked Nov 11 at 13:35

Ori Refael

1,21321644

add a comment |

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