Is firestore.collection a function in Javascript?

Building Registration api for student with using of Firebase, already initialize Firebase.

trying all the different methods and see all the answer on stack overflow but still got the error and double check my Firebase initialize error show in portman

const { error } = require('console');
const firebase = require('../db.js');
const Student = require('../models/student.js')
const firestore = require('../db.js');
const { collection, doc, setDoc, getDocs } = require("firebase/firestore");
// const firestore = firebase.firestore();


const addStudent = async (req, res, next) => {
    try {
        const data = req.body;
        // await firestore.collection('students').doc().set(data);
        // collection(firestore, "students" )
        // const q = query(collection(firestore, "students".doc().set(data)));

        const docRef = doc(collection(firestore, 'students'));
        await setDoc(docRef, data);
        console.log(q,"q is");
        res.send('Record saved successfuly');
    } catch (error) {
        res.status(400).send(error.message);
    }
}