JavaScript wait for asynchronous function in if statement [duplicate]

Question

I have a function inside an if statement

isLoggedin() has an async call.

router.get('/', function(req, res, next) {     if(req.isLoggedin()){ <- never returns true         console.log('Authenticated!');     } else {         console.log('Unauthenticated');     } }); 

how do i await for isLoggedin() in this if statement?

here is my isLoggedin function in which im using passport

app.use(function (req, res, next) {    req.isLoggedin = () => {         //passport-local         if(req.isAuthenticated()) return true;          //http-bearer        passport.authenticate('bearer-login',(err, user) => {            if (err) throw err;            if (!user) return false;            return true;         })(req, res);    };     next(); }); 

Answer 1

I do this exact thing using async/await in my games code here

Assuming req.isLoggedIn() returns a boolean, it's as simple as:

const isLoggedIn = await req.isLoggedIn(); if (isLoggedIn) {     // do login stuff } 

Or shorthand it to:

if (await req.isLoggedIn()) {     // do stuff }  

Make sure you have that inside an async function though!