How to add multiple headers in Angular 5 HttpInterceptor
Since the set method returns headers object every time, you can do this. This way, original headers from the intercepted request will also be retained. const authReq = req.clone({ headers: req.headers.set(‘Content-Type’, ‘application/json’) .set(‘header2’, ‘header 2 value’) .set(‘header3’, ‘header 3 value’) });