Prevent IE11 caching GET call in Angular 2

Question

I have a rest endpoint that returns a list on a GET call. I also have a POST endpoint to add new items and a DELETE to remove them. This works in Firefox and Chrome, and the

Answer 1

As answered above, you can use http request interceptor to modify or set a new header on the request. Below is a much simpler way of setting headers on http request interceptor for Later angular versions(Angular 4+). This approach would only set or update a certain request header. This is to avoid removing or overriding some important headers like the authorization header.

// cache-interceptor.service.ts
import { Injectable } from '@angular/core';
import {
  HttpInterceptor,
  HttpRequest,
  HttpHandler,
} from '@angular/common/http';

@Injectable()
export class CacheInterceptor implements HttpInterceptor {

  intercept(req: HttpRequest, next: HttpHandler) {
    const httpRequest = req.clone({
      headers: req.headers
        .set('Cache-Control', 'no-cache')
        .set('Pragma', 'no-cache')
        .set('Expires', 'Sat, 01 Jan 2000 00:00:00 GMT')
    })

    return next.handle(httpRequest)
  }
}

// app.module.ts

  import { HTTP_INTERCEPTORS } from '@angular/common/http'
  import { CacheInterceptor } from './cache-interceptor.service';

  // on providers
  providers: [{ provide: HTTP_INTERCEPTORS, useClass: CacheInterceptor, multi: true }]