Why error message "TypeError: expressJwt is not a function" is appearing? How can it be fixed?

Question

jwt.js:

const expressJwt = require('express-jwt')

function authJwt() {
    const secret = process.env.secret
    return expressJwt({
        secret,
        algorithms: ['HS256']
    })
}

module.exports = authJwt

terminal:

C:\code-wldn\final-project\wldn-api\helpers\jwt.js:5
return expressJwt({
       ^

TypeError: expressJwt is not a function
    at authJwt (C:\code-wldn\final-project\wldn-api\helpers\jwt.js:5:12)
    at Object.<anonymous> (C:\code-wldn\final-project\wldn-api\app.js:18:9)

I tried to resolve the error message

TypeError: expressJwt is not a function

by ensuring that express-jwt is properly imported and used as a function in the jwt.js file. I expected the error to be resolved, allowing the application to run without any issues related to expressJwt. However, the error persisted despite my attempts to address it.

Answer 1

As per express-jwt documentation says, it should be imported using the following syntax:

var { expressjwt } = require("express-jwt");

Answer 2

Since you are importing the whole module, you have to specify the method to use. For example:

const expressJwt = require('express-jwt');

function authJwt() {
    const secret = process.env.secret;

    return expressJwt.expressjwt({
        secret,
        algorithms: ['HS256'],
    })
  }

resources:By @ChocoNao