.

client/src/Components/Login.js

 import React, { useState, useEffect } from 'react'
-import { Alert, Col, Container, Form, Row, Button, Spinner } from "react-bootstrap";
-import axios from "axios";
-import catchErrors from '../utils/catchErrors';
-import { Redirect } from 'react-router-dom';
-import { handleLogin } from '../utils/auth';
+import { Alert, Col, Container, Form, Row, Button, Spinner } from "react-bootstrap"
+import axios from "axios"
+import catchErrors from '../utils/catchErrors'
+import { Redirect } from 'react-router-dom'
+import { handleLogin } from '../utils/auth'
 
 
 const INIT_USER = {

client/src/Components/Signup.js

 import React, { useState, useEffect } from 'react'
-import { Alert, Col, Container, Form, Row, Button } from "react-bootstrap";
-import axios from "axios";
-import catchErrors from '../utils/catchErrors';
-import { Link, Redirect} from 'react-router-dom';
+import {  Col, Container, Form, Row, Button, Alert } from "react-bootstrap"
+import axios from "axios"
+import catchErrors from '../utils/catchErrors'
+import { Redirect } from 'react-router-dom'
 
 const INIT_USER = {
     name: '',
@@ -32,15 +32,19 @@ function Signup() {
             setError('')
             const response = await axios.post('/api/users/signup', user)
             console.log(response.data)
-            setUser(INIT_USER)
+            console.log(user)
+            // setUser(INIT_USER)
+            setSuccess(true)
         } catch (error) {
+            console.log(error)
             catchErrors(error, setError)
         }
     }
 
     if (success) {
+        alert('회원가입 되었습니다.')
         return <Redirect to='/'/>
-    }
+    } 
 
     return (
         <Container>

client/src/index.js

@@ -15,10 +15,6 @@ import {
 } from "react-router-dom";
 import axios from 'axios';
 
-axios.defaults.validateStatus = function (status){
-  return status < 500;
-}
-
 ReactDOM.render(
   <React.StrictMode>
     <Router>

server/controllers/auth.controller.js

 import User from "../models/User.js"
 import bcrypt from "bcryptjs"
-import jwt from "jsonwebtoken";
-import config from "../config.js";
+import jwt from "jsonwebtoken"
+import config from "../config.js"
 
 const login = async (req, res) => {
     const { email, password } = req.body //구조분해해서 하나씩

server/controllers/user.controller.js

@@ -4,7 +4,7 @@ import isEmail from "validator/lib/isEmail.js"
 import bcrypt from "bcryptjs";
 import multer from "multer";
 
-const upload = multer({ dest: 'uploads/' })
+const upload = multer({ dest: 'uploads/' }) //미들웨어
 
 const profileUpload = upload.fields([
     {name: 'avatar', maxCount: 1},
@@ -12,9 +12,9 @@ const profileUpload = upload.fields([
 ])
 
 const signup = async (req, res) => {
-    const { name, email, password } = req.body 
+    const { name, email, password } = req.body //구조분해해서 하나씩
     console.log(name, email, password)
-    try {             
+    try {             //적어도 3개 맥시멈 10개 가 아니면 
         if (!isLength(name, {min: 3, max: 10})) {
             return res.status(422).send('이름은 3-10자 사이입니다')
         }else if (!isLength(password, {min: 6})) {
@@ -31,10 +31,10 @@ const signup = async (req, res) => {
             name,
             email,
             password: hash
-        }).save()
+        }).save() //save하면 몽고 db에 들어간다 save method가 promise
         console.log(newUser)
-        res.json(newUser)
-    } catch (error) { 
+        res.json(newUser) //json형식으로 바꿔서 문자열로 보낸다 client쪽으로
+    } catch (error) { //다른 과정에서 에러가 나면 실행 
         console.log(error)
         res.status(500).send('회원가입 에러')
     }
@@ -70,7 +70,7 @@ const userById = async (req, res, next, id) => {
             res.status(404).send('사용자를 찾을 수 없습니다')
         }
         req.profile = user
-        next()
+        next() //만나는 순간 다음 미들웨어로 진행 없으면 가만히 있는다
     } catch (error) {
         console.log(error)
         res.status(500).send('사용자 아이디 검색 실패')

server/routes/auth.routes.js

 import express from "express"
-import authCtrl from "../controllers/auth.controller.js";
+import authCtrl from "../controllers/auth.controller.js"
 
 const router = express.Router()
 

server/routes/user.routes.js

-import express from "express";
-import userCtrl from "../controllers/user.controller.js";
+import express from "express"
+import userCtrl from "../controllers/user.controller.js"
 
 const router = express.Router()
 

server/server.js

@@ -14,10 +14,6 @@ app.use(express.json())
 app.use(userRouter)
 app.use(authRouter)
 
-app.get('/', (req,res) => {
-    res.send('Hello world, 안녕하세요.')
-})
-
 app.listen(3001, () => {
     console.log('Listening on port 3001')
 })
\ No newline at end of file