diff --git a/demo/tiddlers/docs/useRenderTiddler.tid b/demo/tiddlers/docs/useRenderTiddler.tid
index fb2a873..f981c9e 100644
--- a/demo/tiddlers/docs/useRenderTiddler.tid
+++ b/demo/tiddlers/docs/useRenderTiddler.tid
@@ -21,9 +21,9 @@ import { IDefaultWidgetProps, ParentWidgetContext } from '$:/plugins/linonetwo/t
 ...
 
 return (
-  <ParentWidgetContext.Provider value={props.parentWidget}>
+  <ParentWidgetContext value={props.parentWidget}>
     <YourComponents />
-  </ParentWidgetContext.Provider>
+  </ParentWidgetContext>
 );
 ```
 
diff --git a/src/hooks/useRenderTiddler.ts b/src/hooks/useRenderTiddler.ts
index 824c485..531208a 100644
--- a/src/hooks/useRenderTiddler.ts
+++ b/src/hooks/useRenderTiddler.ts
@@ -15,7 +15,7 @@ export function useRenderTiddler(tiddlerTitle: string, containerReference: RefOb
     }
     if (parentWidget === undefined) {
       throw new Error(
-        'Your plugin have a bug: `parentWidget` is undefined, you should use `<ParentWidgetContext.Provider value={props.parentWidget}>`, see tw-react for document.',
+        'Your plugin have a bug: `parentWidget` is undefined, you should use `<ParentWidgetContext value={props.parentWidget}>`, see tw-react for document.',
       );
     }
     if (options?.skip === true) {
diff --git a/src/hooks/useWidget.ts b/src/hooks/useWidget.ts
index 94d1acc..ef7fbe8 100644
--- a/src/hooks/useWidget.ts
+++ b/src/hooks/useWidget.ts
@@ -16,7 +16,7 @@ export function useWidget(parseTreeNode: IParseTreeNode, containerReference: Ref
     }
     if (parentWidget === undefined) {
       throw new Error(
-        'Your plugin have a bug: `parentWidget` is undefined, you should use `<ParentWidgetContext.Provider value={props.parentWidget}>`, see tw-react for document.',
+        'Your plugin have a bug: `parentWidget` is undefined, you should use `<ParentWidgetContext value={props.parentWidget}>`, see tw-react for document.',
       );
     }
     if (options?.skip === true) {
diff --git a/src/widget.ts b/src/widget.ts
index 08771e6..926879f 100644
--- a/src/widget.ts
+++ b/src/widget.ts
@@ -16,11 +16,6 @@ if (typeof window !== 'undefined') {
   global.React = React;
 }
 
-// DEBUG: console ReactDom
-console.log(`ReactDom`, ReactDom);
-// DEBUG: console ReactDomClient
-console.log(`ReactDomClient`, ReactDomClient);
-
 class ReactWidgetImpl<
   IProps extends ITWReactProps = ITWReactPropsDefault,
 > extends Widget implements IReactWidget<IProps> {
@@ -99,7 +94,7 @@ class ReactWidgetImpl<
     if (this.reactComponent === undefined || this.reactComponent === null) {
       return;
     }
-    if (this.root === undefined) {
+    if (this.root === undefined && this.parentDomNode !== undefined) {
       const nextSibling = this.findNextSiblingDomNode();
       this.render(this.parentDomNode, nextSibling);
       return;
@@ -111,7 +106,7 @@ class ReactWidgetImpl<
       currentProps.parentWidget = this;
     }
     const reactElement = React.createElement(this.reactComponent, currentProps);
-    this.root.render(reactElement);
+    this.root?.render?.(reactElement);
   }
 
   destroy() {