Angular HttpClient Get method with body

Question

I\'m improving an existing API, and the requirement is to provide a single get method which can accept multiple search criteria and based on those criteria perform the query

Answer 1

This worked for me:

import { HttpClient, HttpHeaders, HttpParams } from '@angular/common/http'; 

filterBooks(category: string, year: string): Observable {
   let httpHeaders = new HttpHeaders()
                         .set('Accept', 'application/json');
   let httpParams = new HttpParams()
                        .set('category', category)
                    .set('year', year);
   console.log(httpParams.toString());
   console.log(httpHeaders.keys());
   return this.http.get(this.bookUrl, {
                headers: httpHeaders,
                params: httpParams, 
                responseType: 'json'
        });
}