doc: fix example error.

Author: jaywcjlove

core/README.md

@@ -30,15 +30,15 @@ import JsonView from '@uiw/react-json-view';
 import { lightTheme } from '@uiw/react-json-view/light';
 
 export default function Demo() {
-  const [value, setValue] = useState([]);
+  const [value, setValue] = useState();
   return (
     <React.Fragment>
       <XMLReader
         onFileLoaded={(data, iFileInfo, iOriginalFile, text) => {
           setValue(data);
         }}
       />
-      {value && value.length > 0 && (
+      {value && (
         <JsonView
           keyName="data"
           value={value}

www/src/index.tsx

@@ -30,7 +30,7 @@ root.render(
     source={data.source}
     components={data.components}
     data={data.data}
-    title="XML View for React"
+    title="XML Reader for React"
     description="React component that handles xml file input and its parsing."
     version={`v${VERSION}`}
   >