Default to using UserDefinedComponent for component renderer lookup

Author: wwwillchen

mesop/web/src/component_renderer/component_renderer.ts

@@ -213,7 +213,7 @@ export class ComponentRenderer {
       };
     }
     const componentClass = typeName.getCoreModule()
-      ? typeToComponent[typeName.getFnName()!]
+      ? typeToComponent[typeName.getFnName()!] || UserDefinedComponent // Some core modules rely on UserDefinedComponent
       : UserDefinedComponent;
     // Need to insert at insertionRef and *not* viewContainerRef, otherwise
     // the component (e.g. <mesop-text> will not be properly nested inside <component-renderer>).

mesop/web/src/component_renderer/type_to_component.ts

@@ -66,9 +66,7 @@ export const typeToComponent = {
   // Textarea is a special case where it's exposed as a separate
   // component / API, but the implementation is almost identical as Input.
   'textarea': InputComponent,
-  'button': UserDefinedComponent,
   'content_button': ButtonComponent,
-  'checkbox': UserDefinedComponent,
   'content_checkbox': CheckboxComponent,
   'text': TextComponent,
   'markdown': MarkdownComponent,