es6 constructor objects passed from source to target file is undefined - node.js

Question

I am trying to access the object values passed from source file to target file.
Here in the code below, I pass an object named auth from ServiceFile.js to ChildClassFile.js
But outside the ChildClassFile.js the properties inside auth object is undefined. Any help on how to access it would be appreciated. Thanks in advance.
Code:
// ServiceFile.js
import ChildClass from 'ChildClass';
export default class Service {
constructor(cookie, token) {
super();
this.auth = {
cookie: 'XXX',
token: 'XXX',
};
this.checkout = new ChildClass(this.auth);
}
async serviceMethod(data) {
return await this.checkout.method1(data);
};
}
// ChildClassFile.js
class ChildClass {
constructor(auth) {
this.auth = auth;
console.log("ChildClass -> constructor -> this.auth", this.auth); // values are present
}
async method1(data) {
return await axios.post({
data: data,
headers: {
token: this.auth.token,
cookie: this.auth.cookie
}, // undefined value for both token and cookie
});
};
}

Answer 1

There are some things wrong in your code. You are calling super in the Service class but it's not extending any other class.
I've noticed that you're not adding an URL to your POST request.
The following code should work:
class Service {
constructor() {
this.auth = {
cookie: 'XXX',
token: 'XXX'
};
this.checkout = new ChildClass(this.auth);
}
async serviceMethod(data) {
return await this.checkout.method1(data);
}
}
class ChildClass {
constructor(auth) {
this.auth = auth;
console.log('ChildClass -> constructor -> this.auth', this.auth); // values are present
}
async method1(data) {
console.log('ChildClass -> this.auth.token,', this.auth.token); // value is present
console.log('ChildClass -> this.auth.cookie', this.auth.cookie); // value is present
return await axios.post('where is the url?', {
data: data,
headers: {
token: this.auth.token,
cookie: this.auth.cookie
}
});
}
}
new Service()
.serviceMethod('dummy data')
.then(res => console.log('res', res))
.catch(err => console.log('err.message', err.message));