const headerDict = {<br /> ‘Content-Type’: ‘application/json’,<br /> ‘Accept’: ‘application/json’,<br /> ‘Access-Control-Allow-Headers’: ‘Content-Type’,<br /> }</p> <p>const requestOptions = {<br /> headers: new HttpHeaders(headerDict),<br /> };</p> <p>return this.http.get(this.heroesUrl, requestOptions)<br />

const headerDict = [{ value: ‘1’ }, { value: ‘2’ }];</p> <p>const requestOptions = {<br /> headers: new Headers(headerDict),<br /> };</p> <p>return this.http.get(this.heroesUrl, requestOptions)<br />