POST http://localhost:5000/user net::ERR_CONNECTION_REFUSED

Question

服务器端代码在这里

async function run() {     try {         // Connect the client to the server   (optional starting in v4.7)         await client.connect();         const database = client.db("userDB");         const usersC = database.collection("users");         app.post('/user', async (req, res) => {             const user = req.body;             console.log(user);             const result = await usersC.insertOne(user);             console.log(

插入了带有_id的文档：${result.insertedId}

)         })         // Send a ping to confirm a successful connection         await client.db("admin").command({ ping: 1 });         console.log("Pinged your deployment. You successfully connected to MongoDB!");     } finally {         // Ensures that the client will close when you finish/error         await client.close();     } }

客户端代码 ` const handalForm = event =>{ 事件.preventDefault(); 常量形式 = event.target;

const name = form.name.value;
const email = form.email.value;
const user ={name,email}
console.log(user);
fetch('http://localhost:5000/user',{
  method:'POST',
  headers: {
    'content-type':'application/json'
  },
  body:JSON.stringify(user)
}).then(res=> res.json()).then(data=>{
  console.log(data);
})

}`

Answer 1

可能是您的后端服务器已关闭或未在端口 5000 上运行。