chore: test;

DEV_README.md

@@ -14,6 +14,8 @@ yarn install
 
 ### 1.2 DEV
 
+注意dev-build之前需要npm run unlink && yarn install && npm run link
+
 ## Q&S
 - The operation couldn’t be completed. Unable to locate a Java Runtime
 

project/mini-react/src/App.js

@@ -1,13 +1,14 @@
+import React from 'react';
 import logo from './logo.svg';
 import './App.css';
-import {CountButton} from "./components"
+import {CountButton} from './components';
 
 function App() {
   return (
     <div className="App">
       <header className="App-header">
         <img src={logo} className="App-logo" alt="logo" />
-        <CountButton/>
+        <CountButton />
       </header>
     </div>
   );

project/mini-react/src/components/CountButton/CountButton.js

@@ -21,12 +21,14 @@ const CountButton = () => {
   useEffect(() => {
     console.log('Hello count Effect');
   }, [count]);
+
+  const ref = useRef();
   return (
-    <>
+    <div ref={ref}>
       <div>Render by state</div>
       <div>{count}</div>
       <button onClick={handleClick}>Add Count</button>
-    </>
+    </div>
   );
 };