Angular 4 – Http to HttpClient – property ‘someproperty’ does not exist on type Object

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You can specify the type that is being returned, using an interface, class, etc. For example, you can use something like the following:

return this.http.get<Sidebar>('http://localhost:3000/sidebar/edit-sidebar');

As an example, Sidebar might be defined as:

interface Sidebar {
    _id: string;
    content: string;
}

See Typechecking the response from the Angular docs for further information:

…TypeScript would correctly complain that the Object coming back from HTTP does not have a results property. That’s because while HttpClient parsed the JSON response into an Object, it doesn’t know what shape that object is.

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