diff --git a/notes/Web/React/ReactBasicNotes.md b/notes/Web/React/ReactBasicNotes.md
index 1bc45976a2..2ef071ebcb 100644
--- a/notes/Web/React/ReactBasicNotes.md
+++ b/notes/Web/React/ReactBasicNotes.md
@@ -814,6 +814,10 @@ class UserInput extends Component {
     this.input = input
   }
 
+  componentDidMount() {
+    this.input.focus()
+  }
+
   render() {
     return (
       <>