Angular Schulung und Beratung

https://www.angulararchitects.io/

Angular Components in Module

To use predefined components in a module, you have to import them into the module itself, not just the app.module. Otherwise you will get an error like this: ‘dx-tree-list’ is not a known element: If ‘dx-tree-list’ is an Angular component, then verify that it is part of this module. If ‘dx-tree-list’ is a Web Component then add ‘CUSTOM_ELEMENTS_SCHEMA’ to the ‘@NgModule.schemas’ of this component to suppress this message. So, to keep with the example, to use dx-tree-list, you need to add DxTreeListModule to DevExtremeModule and then add DevExtremeModule to your module: