DevExpress engineers feature-complete Presentation Controls, IDE Productivity Tools, Business Application Frameworks, and Reporting Systems for Visual Studio, Delphi, HTML5 or iOS & Android development. Angular NG8001 Build Errors - DEV Community Angular: error NG8001: 'component' is not a known element Angular - ERROR in 'router-outlet' is not a known element: "ionic build-prod" throws several code errors that don't show up in regular buildsDescription: I have an Ionic app that is already almost done. 'mat-form-field' is not a known element: 'mat-icon' is not a known element: angular number pipe; angular onclick toggle class; reactive forms get value of control; Type 'Timeout' is not assignable to type 'number'. 'router outlet' is not a known element: - darknet-news.com error 'ng0304 is not a known element - honolulu-supplies.com [ERROR ->] "): ng:///AppRoutingModule/[email protected]:2 'mat-option' is not a known element: 1. https://readdy.net/Notes/Details/1827Angular Error NG8001: 'mat-progress-spinner' is not a known element:Angular Error is an Angular component, then verify t. Angular Errors NG8001 'mat-form-field' is not a known element + NG8002 ... 2. NG8001: 'fa-icon' is not a known element: 1. If 'ngx-datatable' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. Sign up for free to join this conversation on GitHub Sign in to comment with ng test. Angular Errors NG8001 'mat-form-field' is not a known element + NG8002: Can't bind to 'ngModel' since it isn't a known property of 'input'.