can somebody help my with communication between client and server(node.js) index.js

let msg = [{ user: "Sam" }, { user: "John" }];
    const options = {
        method: "POST",
        headers: {
            "Content-Type": "application/json",
        },
        body: JSON.stringify(msg),
        mode: "no-cors",
    };
    fetch(`http://localhost:3000/data`, options);

server.js (node.js)

const express = require("express");
const app = express();
app.use(express.json()); 
app.post("/data", (req, res) => {
    console.log(req.body);
});
app.listen(3000, () => console.log("Server listening a port 3000"));

When I send request, console.log is empty, can somebody tell my why?