+ core: add Custom component to render custom content.

lib/core/src/react/components/custom-content.tsx

@@ -1,4 +1,4 @@
-import {isValidElement} from 'preact';
+import {Component, isValidElement} from 'preact';
 import {HtmlContent} from './html-content';
 import {HElement} from './h-element';
 import {LazyContent} from './lazy-content';
@@ -71,3 +71,9 @@ export function CustomContent(props: CustomContentProps): VNode | null {
     }
     return <>{result}</>;
 }
+
+export class CustomContentClass extends Component<CustomContentProps> {
+    render(props: CustomContentProps): VNode | null {
+        return CustomContent(props);
+    }
+}

lib/core/src/react/custom.ts

@@ -0,0 +1,11 @@
+import {ComponentFromReact} from './component-from-react';
+import {CustomContentClass} from './components';
+import {CustomContentProps} from './types';
+
+export class Custom extends ComponentFromReact<CustomContentProps, CustomContentClass> {
+    static NAME = 'Custom';
+
+    static Component = CustomContentClass;
+}
+
+Custom.register();

lib/core/src/react/index.ts

@@ -2,4 +2,5 @@ export * from './preact';
 export * from './signals';
 export * from './components';
 export * from './component-from-react';
+export * from './custom';
 export * from './types';