core.js:6185 ERROR NullInjectorError: R3InjectorError(AppModule)[BookServiceService -> HttpClient -> HttpClient -> HttpClient]: NullInjectorError: No provider for HttpClient! code example
Example 1: angular No provider for HttpClient
// open the root app.module.ts,
import { HttpClientModule } from '@angular/common/http';
// add it to the @NgModule.imports array.
imports:[HttpClientModule, ]
Example 2: No provider for HttpClient!
import { HttpClientModule } from '@angular/common/http';