React-native retrieve method return value of another class

Question

I am trying to receive the return value of a method in another class with react-native.

ClassA.js

export default class ClassA{
    send(query) {
    var value = 1+query;
    return value;
  }
}

Trying to get value from class App.js

var value = ClassA.send(query);

This doesn't work however. I am receiving the following error:

ClassA.default.send is not a function, '_ClassA.default.send' is undefined

sdkcy · Accepted Answer · 2019-02-08 19:41:53Z

1

you need to add static keyword to use as a class method,

export default class ClassA{
    static send(query) {
      var value = 1+query;
      return value;
    }
}

so you can access it with,

var value = ClassA.send(query);

or you can use it as a instance method;

export default class ClassA{
   send(query) {
     var value = 1+query;
     return value;
   }
}

and in this situation you can access that method from instance;

var instance = new ClassA();
var value = instance.send(query);

answered Feb 8, 2019 at 19:41

sdkcy

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