How to set http call timeout in angularjs 4?

If you are using RxJS version 6 and above the current syntax is this:

import { timeout } from 'rxjs/operators';
...
getUsers() {
   return this.http.post(API_URL, {headers: Myheaders})
      .pipe(
          timeout(5000) //5 seconds
      );
} 

Reference: https://rxjs-dev.firebaseapp.com/api/operators/timeout

There is a timeout operator:

getUsers() {
   return this.http.post(this.baseUrl + "users", {headers: Myheaders})
         .timeout(3000, new Error('timeout exceeded'))
         .map(res => res.json());
}