I added the following console messages
getHeroes(): Promise<Hero[]> {
return this.http.get(this.heroesUrl)
.toPromise()
.then(response => { console.log("service response text " +
response.statusText);
console.log("service response data " +
response.json().data);
console.log("service response status " + response.status);
response.json().data as Hero[];}
.catch(this.handleError);
}
and the output was
service response text OK
service response dataundefined
service response status 200
returned heroes is undefined
>
>
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