Set values to the inner property of the object

In my configuration file, I have set up nested properties as shown below

export class Config {
     public msalConfig: {
        auth: {
          authority: string;
          clientId: string;
          validateAuthority: boolean;
          redirectUri: string;
          postLogoutRedirectUri: string;
          navigateToLoginRequestUrl: boolean;
        },
        cache: {};
        scopes: {};
        system: {};
      };
}

When trying to assign values to the nested properties in the TypeScript file, an error is thrown

public Settings: Config = null;
this.Settings.msalConfig.auth.redirectUri = window.location.href;

Could someone please advise on how to correctly assign values to these nested properties?

typescriptangular8

Answer №1

If you are unable to access the inner property of the Settings variable because it is null, then the msalConfig does not exist within it yet. You must first initialize the Settings as an object before setting a value for msalConfig.

Initialize the Settings with a new instance of Config

private Settings: Config = new Config();

Next, set a value for msalConfig, such as in the constructor:

this.Settings.msalConfig = {
    auth: {
        authority: null,
        clientId: null,
        validateAuthority: false,
        redirectUri: null,
        postLogoutRedirectUri: null,
        navigateToLoginRequestUrl: false
      },
      cache: {},
      scopes: {},
      system: {}
    };

Now you can set a value for redirectUri as desired:

this.Settings.msalConfig.auth.redirectUri = window.location.href;

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