Cookie not show in browser

Cookie not show in browser : i try again and again but cookie send from backend but not store in browser, i also try another browser like chrome and microsoft bing
this is node js code and html, javascript

**backend code :

**

const express = require('express')
const cookieParser = require('cookie-parser')
const cors = require('cors')
const app = express();
app.listen(8080,()=>{
    console.log("express")
})
app.use(cookieParser())
app.use(cors())

app.get('/login',(req,res)=>{
    res.cookie('cookies','myid',{
        httpOnly:true
    }).json({msg:"cookies sended ! "})
})

**front end code :

**

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button onclick="myfunction()">Fetch</button>

    <script>
        const myfunction = async ()=>{
        let res = await fetch('http://localhost:8080/login',{ method:"GET"})
        res = await res.json()
        console.log(res)
        }
    </script>
</body>
</html>

output in consol :

{ msg: 'cookies sended ! '}

i am expecting :
cookies store in browser