[EDIT]error edir

.gitignore

@@ -2,3 +2,4 @@
 
 # Ignore node_modules directory
 node_modules/
+package.json/

react-whenMeet/package.json

@@ -19,7 +19,7 @@
     "web-vitals": "^2.1.4"
   },
   "scripts": {
-    "start": "export PORT=80 && react-scripts start",
+    "start": "react-scripts start",
     "build": "react-scripts build",
     "test": "react-scripts test",
     "eject": "react-scripts eject"

react-whenMeet/src/components/LinkPageForm.js

@@ -11,14 +11,15 @@ function LinkPageForm() {
     const {id} = location.state;
 
 
-    const copyToClipboard = async (link) => {
-        try {
-            const textToCopy = `localhost:3000/HomeParticipate/${id}`;
-            await navigator.clipboard.writeText(textToCopy);
-            alert('클립보드에 복사되었습니다');
-        } catch (err) {
-            alert('클립보드 복사에 실패하였습니다');
-        }
+    const copyToClipboard = () => {
+        const textToCopy = `localhost:3000/HomeParticipate/${id}`;
+        const tempInput = document.createElement('input');
+        document.body.appendChild(tempInput);
+        tempInput.value = textToCopy;
+        tempInput.select();
+        document.execCommand('copy');
+        document.body.removeChild(tempInput);
+        alert('클립보드에 복사되었습니다');
     };
 
     const handleSubmit = async(event) => {
@@ -30,6 +31,7 @@ function LinkPageForm() {
     return (
         <form onSubmit={handleSubmit}>
             <div>
+                <p>hey</p>
                 <Input
                     value={`localhost:3000/HomeParticipate/${id}`}
                 />

react-whenMeet/src/components/MeetingInfoForm.js

@@ -31,6 +31,7 @@ function MeetingInfoForm() {
       setNumber(inputValue);
     } else {
       alert("양수만을 입력하세요");
+      setNumber("");
     }
   };