How do you pass headers for HTTP client?

You can directly pass object map for http client or create HttpHeaders class to supply the headers.

constructor(private _http: HttpClient) {}
this._http.get('someUrl',{
headers: {'header1':'value1','header2':'value2'}
});
(or)
let headers = new HttpHeaders().set('header1', headerValue1); // create header object
headers = headers.append('header2', headerValue2); // add a new header, creating a new object
headers = headers.append('header3', headerValue3); // add another header
let params = new HttpParams().set('param1', value1); // create params object
params = params.append('param2', value2); // add a new param, creating a new object
params = params.append('param3', value3); // add another param
return this._http.get<any[]>('someUrl', { headers: headers, params: params })

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Made by Michael Sakhniuk

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