Angular 4/5 HttpClient: Argument of type string is not assignable to 'body'

Question

The Angular docs say:

The response body doesn\'t return all the data you may need. Sometimes servers return special headers or status codes to indic

Answer 1

Typescript complains about this problem

Type 'string' is not assignable to type "body"

To solve this, convert string to body manually. Example:

    const httpOptions = {
      headers: new HttpHeaders({
        'Content-Type': 'application/json'
      }),
      observe: 'response' as 'body'
    };
    return this.http.post(url, data, httpOptions);