The interface IJobDetails cannot be assigned to type null

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In the code snippet below, I have created an interface called ClientState1. Now, I am attempting to define a constant named descriptionJobDetails with the type ClientState1, specifically for IJobDetails. However, I am encountering an error as illustrated in the figure.

export interface ClientState1<State> {
      state: State;
      loading: boolean;
      error: any;
}

export interface IJobDetails {
    id: number;
    aboutTheCompany: string;
}

const descriptionJobDetails: ClientState1<IJobDetails> = { state: null, loading: false, error: '' };

Answer №1

When utilizing strictNullChecks or strict, you may encounter a limitation where it prevents you from assigning null to a type that does not explicitly allow for it.

To work around this, you can clearly specify that the field accepts null:

interface ClientState1<State> {
    state: State | null;
    loading: boolean;
    error: any;
}

If you simply need to assign null to the field temporarily for specific reasons, you can utilize the non-null assertion operator (!):

const descriptionJobDetails: ClientState1<IJobDetails> = { state: null!, loading: false, error: '' };

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