update theme document and example

Author: dev-javascript

README.md

@@ -480,6 +480,14 @@ const [TabList, PanelList, ready] = useDynTabs({isVertical: true});
   useDynTabs({theme:'classic'});
   ```
 
+#### Notes
+
+- If the `theme` option is not provided then all imported themes CSS will be applied to the `Tablist`.
+
+- If the `theme` option is set to a empty string then imported themes CSS will not be applied to the `Tablist`.
+
+- You can create your own theme CSS and set the `theme` option to your theme class name
+
 ### tablistStyle
 
 <table>

example/stories/minimal-usage/README.md

@@ -145,3 +145,39 @@ function App() {
 }
 <App />;
 ```
+
+### blank theme
+
+```jsx
+import React from 'react';
+import 'react-dyn-tabs/style/react-dyn-tabs.css';
+import useDynTabs from 'react-dyn-tabs';
+
+const initialOptions = {
+  tabs: [
+    {
+      id: '1',
+      title: 'tab 1',
+      panelComponent: (props) => <p> panel 1 </p>,
+    },
+    {
+      id: '2',
+      title: 'tab 2',
+      panelComponent: (props) => <p> panel 2 </p>,
+    },
+  ],
+  selectedTabID: '1',
+  theme: '',
+};
+
+function App() {
+  const [TabList, PanelList] = useDynTabs(initialOptions);
+  return (
+    <div>
+      <TabList></TabList>
+      <PanelList></PanelList>
+    </div>
+  );
+}
+<App />;
+```