Encountering an issue in Angular with BehaviorSubject where it states that the property 'access_token' is not found on type 'never'

Within my Angular project, I have implemented authentication methods in the auth.service. The admin access token retrieved from the API is stored in a BehaviorSubject as shown below:

adminData = new BehaviorSubject(null);

saveAdminData(token:any) {
    let admin:any = new AdminData(token);
    this.adminData.next(admin);
}

I encountered an issue when trying to access the access_token property of the admin using the following code snippet:

this.adminData.value.access_token;

This resulted in the error message Object is possibly 'null'. To address this, I attempted the following approach:

this.adminData.value!.access_token;

However, this led to a different error stating

Property 'access_token' does not exist on type 'never'.

Answer №1

To begin, make sure to set up the BehaviorSubject. It's essential to specify the data type you are working with in TypeScript. Here is an example:

userData = new BehaviorSubject<any | null>(null);

Answer №2

One option is to employ a ReplaySubject, which functions similarly to a BehaviorSubject but without requiring an initial value.

userData = new ReplaySubject<any | null>();

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