Variable cannot access outside .then()

Question

I am trying to set a authenticator for my local application. Found that I am not able to access my var outside my .then() method

var authenticated = false;
Auth.findtheUser({
}).then(user => {
  verified= user.name.verified;
  console.log("authenticated11", verified)
}
).catch(err => console.log(err));
console.log("authenticated", verified)

the output for authenticated11 output comes as true but not the one at the end Could anyone help me out on this. New to javascript.

score 2 · Answer 1 · answered Feb 03 '22 at 21:24

2

You cant use the result of an asynchronous function directly after it in JS. See this question: How to return the response from an asynchronous call

answered Feb 03 '22 at 21:24

Sean

1,368
2
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The question does have lot of information in it i am not sure promise would work for my case – Ajay Antonyraj Feb 03 '22 at 21:43
You are using a promise in your current code. Then .then() function is called after findtheUser resolves. – Sean Feb 03 '22 at 21:49

Alejandro Molina · Answer 2 · 2022-02-03T22:05:46.640

0

According to what you described in a comment in this answer. You are facing an exception related to the scope.

var authenticated = false;
Auth.findtheUser({
  }).then(user => {
    verified= user.name.verified;
    console.log("authenticated11", verified)
}
).catch(err => console.log(err));
// This will throw an exception because verified does not exist in this scope
console.log("authenticated", verified)

You should change that to this

var authenticated = false;
var verified;
Auth.findtheUser({
  }).then(user => {
    verified= user.name.verified;
    console.log("authenticated11", verified)
}
).catch(err => console.log(err));
// This will throw an exception because verified does not exist in this scope
console.log("authenticated", verified)

edited Feb 03 '22 at 22:05

answered Feb 03 '22 at 21:35

Alejandro Molina

170
2
13

When i declare in this way The compiler days verified is not defined no-undef – Ajay Antonyraj Feb 03 '22 at 21:50
Ok that is different! You got that exception because you had not declared the variable before and the console log is out of the scope of "verified" variable. I'll edit my answer to you – Alejandro Molina Feb 03 '22 at 21:57
I tried this approach before asking the question in stackoverflow. The answer you posted did not work, the output for the verified var is undefined – Ajay Antonyraj Feb 03 '22 at 22:11
You can't log it out of the scope of the promise – Alejandro Molina Feb 03 '22 at 22:15
That is what my issue is I want the variable to be used outside of the promise block – Ajay Antonyraj Feb 04 '22 at 04:18

Variable cannot access outside .then()

2 Answers2