If 'choose-popup-data-reference' is an Angular component, then verify that it is part of this module. I have several modules that use the same modules, so I made a general-modules.ts file. Accordion - 'sb-item-head' is not a known element The Core module contains all of the components that I want to be shared … Angular material datepicker component not working. Core module component and Shared module implementation in angular . 0. If 'router-outlet' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. I use this component in other modules, … 1. If 'app-nav' is an Angular component, then verify that it is part of this module. If ‘jqxKanban’ is an Angular component, then verify that it is part of this module. Hello Developer, Hope you guys … 25. how to use parent module component in child module component in angular2. To allow any element add 'NO_ERRORS_SCHEMA' to the '@NgModule.schemas' of this component. If 'fa-icon' is an Angular component, then verify that it is part of this module. angular angularjs angularjs-directive. If 'full-calendar' is an Angular component, then verify that it is part of this module. 2. Imported SwiperModule in Intro Module. router-outlet' is not a known element: Code Example In one of the Angular2 components that I route to, I want to use a Material Design Button. … 'material-icon' is not a known element. 2. is not a known element If 'fa-icon' is an Angular component, then verify that it is part of this module. 2. The app ran fine when served, but ng test produced this error message: 'app-heroes' is not a known element. Adding the HeroesComponent manually to the declarations in configureTestingModule (in app.component.spec.ts) eliminates this error. app/mycomponent.component.ts import { Component, Input } from '@angular/core'; @Component({ selector: 'mycomponent', template: ` …