'hello'

src/pages/book/index.tsx

@@ -40,9 +40,13 @@ marked.setOptions({
 // export default class Index extends Component {
 const Book = () => {
   const [markText, setmarkText] = useState();
+  const [isWeChat, setisWeChat] = useState(false);
+
   const [book, setbook] = useState(window.localStorage.getItem("book"));
 
-  useEffect(() => {}, []);
+  useEffect(() => {
+    isWeChatFun();
+  }, []);
 
   // const handleClick = (value) => {
   //   // 跳转到目的页面，在当前页面打开
@@ -51,6 +55,18 @@ const Book = () => {
   //   });
   // };
 
+    // 是否在微信客户端
+    const isWeChatFun = () => {
+      var ua = navigator.userAgent.toLowerCase();
+      if (ua.indexOf("micromessenger") != -1) {
+        setisWeChat(true);
+        return true;
+      } else {
+        setisWeChat(false);
+        return false;
+      }
+    };
+  
   const payh5 = (type, total_fee = 1000) => {
     // console.log("111");
     Taro.request({