Access static variable from another class in React-Native app?

Question

in my react-native app I currently have a User class in which I define a current user as below:

class User {
    static currentUser = null;

    //other relevant code here

    static getCurrentUser() {
        return currentUser;
    }
}

export default User;

In a different class, I am trying to access the set value of this currentUser. I cannot figure out how to correctly call this function; I am getting the error User.getCurrentUser is not a function. Should I be calling this function in a different way?

var User = require('./User');

getInitialState: function() {

    var user = User.getCurrentUser();

    return {
        user: user
    };


},

Balázs Édes · Accepted Answer · 2016-05-30 05:46:57Z

10

You are mixing import / export styles. You should either change your import to

var User = require('./User').default

or

import User from './User'

Or change your export:

module.exports = User

answered May 30, 2016 at 5:46

Balázs Édes

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Comments

FlorianE · Accepted Answer · 2016-05-30 11:26:37Z

6

I think you also forgot the this keyword for returning the static "currentUser" field:

class User {
  constructor() {}

  static currentUser = {
    uname: 'xxx',
    firstname: 'first',
    lastname: 'last'
  };

  static getCurrentUser() {
    return this.currentUser;
  }
}

console.log(User.getCurrentUser());

answered May 30, 2016 at 11:26

FlorianE

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1 Comment

gsziszi Over a year ago

For static variables "this" is not a valid source. In this case User.currentUser is the right format.

OAslan · Accepted Answer · 2020-01-14 08:45:57Z

0

Try arrow function:

class User {
    static currentUser = null;

    static getCurrentUser = () => {
        return currentUser;
    }
}
export default User;

answered Jan 14, 2020 at 8:45

OAslan

1145 bronze badges

1 Comment

gehbiszumeis Over a year ago

Please put your answer always in context instead of just pasting code. See here for more details.

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