session not persisting with express-session in mobile website

Question

I have a web app built using NodeJS ,Express and AngularJS.I am using express-session for maintaining login sessions.

In desktop browser,the login session persists,as expected,even after the browser is closed,but

While accessing the website from mobile, the user gets automatically logged out every time the mobile browser is closed.

Sample code is as following:

let express = require('express');
let app = express();
let session = require('express-session');
let MongoStore = require('connect-mongo')(session);

app.use(session({
    secret: config.sessionSecret,
    name: "test",
    store: new MongoStore({
        url: mongoConnectionUrl,
        ttl: 2 * 24 * 60 * 60, // = 2 days. Default 
        autoRemove: 'native'
    }),
    resave: true,
    saveUninitialized: true
}));

How to stop auto logout of the user in mobile when the mobile browser is closed?

Website facing the above issue: https://ayan.work/notes

Answer 1

Just use the following code for configuration:

app.use(session({
    secret: config.sessionSecret,
    name: "test",
    cookie: { maxAge: 3 * 24 * 60 * 60 * 1000 }, //user won't have to login for 3 days
    store: new (require('express-sessions'))({
        storage: 'mongodb',
        instance: mongoose, // optional 
        host: 'localhost', // optional 
        port: 27017, // optional 
        db: 'database name', // optional 
        collection: 'sessions', // optional 
        expire: 86400 // optional 
    })
}));

The option maxAge will maintain data in cookie there.