xx

B/2/P01.html

@@ -1,7 +1,7 @@
 <!--
  * @Author: chenxuan
  * @Date: 2022-01-02 15:24:10
- * @LastEditTime: 2022-01-02 19:52:21
+ * @LastEditTime: 2022-03-20 14:16:57
  * @LastEditors: chenxuan
 -->
 <!DOCTYPE html>
@@ -34,5 +34,6 @@
             <Demo/>,document.getElementById('app')
         )
     </script>
+    <!-- 字符串类型的ref有效率问题，不推荐使用 -->
 </body>
 </html>

B/2/P03.html

@@ -1,7 +1,7 @@
 <!--
  * @Author: chenxuan
  * @Date: 2022-01-02 22:09:19
- * @LastEditTime: 2022-01-02 22:31:39
+ * @LastEditTime: 2022-03-20 14:35:58
  * @LastEditors: chenxuan
 -->
 <!DOCTYPE html>
@@ -23,7 +23,7 @@
             // 这种写法，更新时不会调用
             haha=(c)=>{
                 this.hehe=c;
-                console.log(c)
+                console.log("xx")
             }
             change=()=>{
                 const {ishot}=this.state;

B/2/P04.html

@@ -1,7 +1,7 @@
 <!--
  * @Author: chenxuan
  * @Date: 2022-01-02 23:49:08
- * @LastEditTime: 2022-01-02 23:51:41
+ * @LastEditTime: 2022-03-20 18:20:28
  * @LastEditors: chenxuan
 -->
 <!DOCTYPE html>
@@ -21,6 +21,7 @@
         class Demo extends React.Component{
             myef=React.createRef();
             getValue=()=>{
+                console.log(this.myef)
                 alert(this.myef.current.value)
             }
             render(){
@@ -36,6 +37,6 @@
             <Demo/>,document.getElementById('app')
         )
     </script>
-    
+    <!-- 该容器专人专用，只能存1个 -->
 </body>
 </html>