I created NodeJS server with Express.js and now I’m trying to make a request for it by fetch.
fetch("http://localhost:3001/api", {
method: "POST",
headers: {
"Content-Type": "application/json",
},
body: JSON.stringify(formData),
})
.then((response) => response.json())
.then((data) => {
if (data.user) {
alert(`Welcome, ${data.user.name}!`);
} else {
alert("User not found!");
}
})
.catch((error) => {
alert("Error fetching data:" + error);
});
This is server part:
const express = require('express');
const cors = require('cors');
const bodyParser = require('body-parser');
const app = express();
app.use(cors());
app.use(bodyParser.json());
const users = {
AG0n1: {
name: "AG0n1",
status: "admin",
email: "[email protected]",
password: "111",
phoneNumber: "+375293883088",
},
Teacher: {
name: "Teacher",
status: "admin",
email: "admin",
password: "test",
phoneNumber: "+375293883088",
},
User: {
name: "User",
status: "user",
test: "test",
},
};
app.post('/api', (req, res) => {
console.log("Received a POST request");
const { email, password } = req.body;
const user = Object.values(users).find((u) => u.email === email && u.password === password);
if (user) {
console.log(user)
res.json({ user });
} else {
res.status(401).json({ error: 'Invalid credentials' });
}
});
app.get('/api', (req, res) => {
res.json(users);
});
But sometimes at random moment I get the following error:
Error fetching data:TypeError: Failed to fetch
At first glance, there seems to be no pattern to this error. Sometimes I get the expected result and sometimes this error.
Can you help me to solve this problem?
ChatGPT said that my code is normal and that I used middleware ‘cors()’. He didnt help me so i decided to ask this question here.
